- 17 Apr, 2020 37 commits
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Qu Wenruo authored
[ Upstream commit d61acbbf ] [BUG] There are some reports about btrfs wait forever to unmount itself, with the following call trace: INFO: task umount:4631 blocked for more than 491 seconds. Tainted: G X 5.3.8-2-default #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. umount D 0 4631 3337 0x00000000 Call Trace: ([<00000000174adf7a>] __schedule+0x342/0x748) [<00000000174ae3ca>] schedule+0x4a/0xd8 [<00000000174b1f08>] schedule_timeout+0x218/0x420 [<00000000174af10c>] wait_for_common+0x104/0x1d8 [<000003ff804d6994>] btrfs_qgroup_wait_for_completion+0x84/0xb0 [btrfs] [<000003ff8044a616>] close_ctree+0x4e/0x380 [btrfs] [<0000000016fa3136>] generic_shutdown_super+0x8e/0x158 [<0000000016fa34d6>] kill_anon_super+0x26/0x40 [<000003ff8041ba88>] btrfs_kill_super+0x28/0xc8 [btrfs] [<0000000016fa39f8>] deactivate_locked_super+0x68/0x98 [<0000000016fcb198>] cleanup_mnt+0xc0/0x140 [<0000000016d6a846>] task_work_run+0xc6/0x110 [<0000000016d04f76>] do_notify_resume+0xae/0xb8 [<00000000174b30ae>] system_call+0xe2/0x2c8 [CAUSE] The problem happens when we have called qgroup_rescan_init(), but not queued the worker. It can be caused mostly by error handling. Qgroup ioctl thread | Unmount thread ----------------------------------------+----------------------------------- | btrfs_qgroup_rescan() | |- qgroup_rescan_init() | | |- qgroup_rescan_running = true; | | | |- trans = btrfs_join_transaction() | | Some error happened | | | |- btrfs_qgroup_rescan() returns error | But qgroup_rescan_running == true; | | close_ctree() | |- btrfs_qgroup_wait_for_completion() | |- running == true; | |- wait_for_completion(); btrfs_qgroup_rescan_worker is never queued, thus no one is going to wake up close_ctree() and we get a deadlock. All involved qgroup_rescan_init() callers are: - btrfs_qgroup_rescan() The example above. It's possible to trigger the deadlock when error happened. - btrfs_quota_enable() Not possible. Just after qgroup_rescan_init() we queue the work. - btrfs_read_qgroup_config() It's possible to trigger the deadlock. It only init the work, the work queueing happens in btrfs_qgroup_rescan_resume(). Thus if error happened in between, deadlock is possible. We shouldn't set fs_info->qgroup_rescan_running just in qgroup_rescan_init(), as at that stage we haven't yet queued qgroup rescan worker to run. [FIX] Set qgroup_rescan_running before queueing the work, so that we ensure the rescan work is queued when we wait for it. Fixes: 8d9eddad ("Btrfs: fix qgroup rescan worker initialization") Signed-off-by:
Jeff Mahoney <jeffm@suse.com> [ Change subject and cause analyse, use a smaller fix ] Signed-off-by:
Qu Wenruo <wqu@suse.com> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
Sasha Levin <sashal@kernel.org>
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Zhiqiang Liu authored
[ Upstream commit 2f95fa5c ] In bfq_idle_slice_timer func, bfqq = bfqd->in_service_queue is not in bfqd-lock critical section. The bfqq, which is not equal to NULL in bfq_idle_slice_timer, may be freed after passing to bfq_idle_slice_timer_body. So we will access the freed memory. In addition, considering the bfqq may be in race, we should firstly check whether bfqq is in service before doing something on it in bfq_idle_slice_timer_body func. If the bfqq in race is not in service, it means the bfqq has been expired through __bfq_bfqq_expire func, and wait_request flags has been cleared in __bfq_bfqd_reset_in_service func. So we do not need to re-clear the wait_request of bfqq which is not in service. KASAN log is given as follows: [13058.354613] ================================================================== [13058.354640] BUG: KASAN: use-after-free in bfq_idle_slice_timer+0xac/0x290 [13058.354644] Read of size 8 at addr ffffa02cf3e63f78 by task fork13/19767 [13058.354646] [13058.354655] CPU: 96 PID: 19767 Comm: fork13 [13058.354661] Call trace: [13058.354667] dump_backtrace+0x0/0x310 [13058.354672] show_stack+0x28/0x38 [13058.354681] dump_stack+0xd8/0x108 [13058.354687] print_address_description+0x68/0x2d0 [13058.354690] kasan_report+0x124/0x2e0 [13058.354697] __asan_load8+0x88/0xb0 [13058.354702] bfq_idle_slice_timer+0xac/0x290 [13058.354707] __hrtimer_run_queues+0x298/0x8b8 [13058.354710] hrtimer_interrupt+0x1b8/0x678 [13058.354716] arch_timer_handler_phys+0x4c/0x78 [13058.354722] handle_percpu_devid_irq+0xf0/0x558 [13058.354731] generic_handle_irq+0x50/0x70 [13058.354735] __handle_domain_irq+0x94/0x110 [13058.354739] gic_handle_irq+0x8c/0x1b0 [13058.354742] el1_irq+0xb8/0x140 [13058.354748] do_wp_page+0x260/0xe28 [13058.354752] __handle_mm_fault+0x8ec/0x9b0 [13058.354756] handle_mm_fault+0x280/0x460 [13058.354762] do_page_fault+0x3ec/0x890 [13058.354765] do_mem_abort+0xc0/0x1b0 [13058.354768] el0_da+0x24/0x28 [13058.354770] [13058.354773] Allocated by task 19731: [13058.354780] kasan_kmalloc+0xe0/0x190 [13058.354784] kasan_slab_alloc+0x14/0x20 [13058.354788] kmem_cache_alloc_node+0x130/0x440 [13058.354793] bfq_get_queue+0x138/0x858 [13058.354797] bfq_get_bfqq_handle_split+0xd4/0x328 [13058.354801] bfq_init_rq+0x1f4/0x1180 [13058.354806] bfq_insert_requests+0x264/0x1c98 [13058.354811] blk_mq_sched_insert_requests+0x1c4/0x488 [13058.354818] blk_mq_flush_plug_list+0x2d4/0x6e0 [13058.354826] blk_flush_plug_list+0x230/0x548 [13058.354830] blk_finish_plug+0x60/0x80 [13058.354838] read_pages+0xec/0x2c0 [13058.354842] __do_page_cache_readahead+0x374/0x438 [13058.354846] ondemand_readahead+0x24c/0x6b0 [13058.354851] page_cache_sync_readahead+0x17c/0x2f8 [13058.354858] generic_file_buffered_read+0x588/0xc58 [13058.354862] generic_file_read_iter+0x1b4/0x278 [13058.354965] ext4_file_read_iter+0xa8/0x1d8 [ext4] [13058.354972] __vfs_read+0x238/0x320 [13058.354976] vfs_read+0xbc/0x1c0 [13058.354980] ksys_read+0xdc/0x1b8 [13058.354984] __arm64_sys_read+0x50/0x60 [13058.354990] el0_svc_common+0xb4/0x1d8 [13058.354994] el0_svc_handler+0x50/0xa8 [13058.354998] el0_svc+0x8/0xc [13058.354999] [13058.355001] Freed by task 19731: [13058.355007] __kasan_slab_free+0x120/0x228 [13058.355010] kasan_slab_free+0x10/0x18 [13058.355014] kmem_cache_free+0x288/0x3f0 [13058.355018] bfq_put_queue+0x134/0x208 [13058.355022] bfq_exit_icq_bfqq+0x164/0x348 [13058.355026] bfq_exit_icq+0x28/0x40 [13058.355030] ioc_exit_icq+0xa0/0x150 [13058.355035] put_io_context_active+0x250/0x438 [13058.355038] exit_io_context+0xd0/0x138 [13058.355045] do_exit+0x734/0xc58 [13058.355050] do_group_exit+0x78/0x220 [13058.355054] __wake_up_parent+0x0/0x50 [13058.355058] el0_svc_common+0xb4/0x1d8 [13058.355062] el0_svc_handler+0x50/0xa8 [13058.355066] el0_svc+0x8/0xc [13058.355067] [13058.355071] The buggy address belongs to the object at ffffa02cf3e63e70#012 which belongs to the cache bfq_queue of size 464 [13058.355075] The buggy address is located 264 bytes inside of#012 464-byte region [ffffa02cf3e63e70, ffffa02cf3e64040) [13058.355077] The buggy address belongs to the page: [13058.355083] page:ffff7e80b3cf9800 count:1 mapcount:0 mapping:ffff802db5c90780 index:0xffffa02cf3e606f0 compound_mapcount: 0 [13058.366175] flags: 0x2ffffe0000008100(slab|head) [13058.370781] raw: 2ffffe0000008100 ffff7e80b53b1408 ffffa02d730c1c90 ffff802db5c90780 [13058.370787] raw: ffffa02cf3e606f0 0000000000370023 00000001ffffffff 0000000000000000 [13058.370789] page dumped because: kasan: bad access detected [13058.370791] [13058.370792] Memory state around the buggy address: [13058.370797] ffffa02cf3e63e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fb fb [13058.370801] ffffa02cf3e63e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [13058.370805] >ffffa02cf3e63f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [13058.370808] ^ [13058.370811] ffffa02cf3e63f80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [13058.370815] ffffa02cf3e64000: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [13058.370817] ================================================================== [13058.370820] Disabling lock debugging due to kernel taint Here, we directly pass the bfqd to bfq_idle_slice_timer_body func. -- V2->V3: rewrite the comment as suggested by Paolo Valente V1->V2: add one comment, and add Fixes and Reported-by tag. Fixes: aee69d78 ("block, bfq: introduce the BFQ-v0 I/O scheduler as an extra scheduler") Acked-by:
Paolo Valente <paolo.valente@linaro.org> Reported-by:
Wang Wang <wangwang2@huawei.com> Signed-off-by:
Zhiqiang Liu <liuzhiqiang26@huawei.com> Signed-off-by:
Feilong Lin <linfeilong@huawei.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
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Boqun Feng authored
[ Upstream commit 25016bd7 ] Qian Cai reported a bug when PROVE_RCU_LIST=y, and read on /proc/lockdep triggered a warning: [ ] DEBUG_LOCKS_WARN_ON(current->hardirqs_enabled) ... [ ] Call Trace: [ ] lock_is_held_type+0x5d/0x150 [ ] ? rcu_lockdep_current_cpu_online+0x64/0x80 [ ] rcu_read_lock_any_held+0xac/0x100 [ ] ? rcu_read_lock_held+0xc0/0xc0 [ ] ? __slab_free+0x421/0x540 [ ] ? kasan_kmalloc+0x9/0x10 [ ] ? __kmalloc_node+0x1d7/0x320 [ ] ? kvmalloc_node+0x6f/0x80 [ ] __bfs+0x28a/0x3c0 [ ] ? class_equal+0x30/0x30 [ ] lockdep_count_forward_deps+0x11a/0x1a0 The warning got triggered because lockdep_count_forward_deps() call __bfs() without current->lockdep_recursion being set, as a result a lockdep internal function (__bfs()) is checked by lockdep, which is unexpected, and the inconsistency between the irq-off state and the state traced by lockdep caused the warning. Apart from this warning, lockdep internal functions like __bfs() should always be protected by current->lockdep_recursion to avoid potential deadlocks and data inconsistency, therefore add the current->lockdep_recursion on-and-off section to protect __bfs() in both lockdep_count_forward_deps() and lockdep_count_backward_deps() Reported-by:
Qian Cai <cai@lca.pw> Signed-off-by:
Boqun Feng <boqun.feng@gmail.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200312151258.128036-1-boqun.feng@gmail.comSigned-off-by:
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Junyong Sun authored
[ Upstream commit bcfbd352 ] fw_sysfs_wait_timeout may return err with -ENOENT at fw_load_sysfs_fallback and firmware is already in abort status, no need to abort again, so skip it. This issue is caused by concurrent situation like below: when thread 1# wait firmware loading, thread 2# may write -1 to abort loading and wakeup thread 1# before it timeout. so wait_for_completion_killable_timeout of thread 1# would return remaining time which is != 0 with fw_st->status FW_STATUS_ABORTED.And the results would be converted into err -ENOENT in __fw_state_wait_common and transfered to fw_load_sysfs_fallback in thread 1#. The -ENOENT means firmware status is already at ABORTED, so fw_load_sysfs_fallback no need to get mutex to abort again. ----------------------------- thread 1#,wait for loading fw_load_sysfs_fallback ->fw_sysfs_wait_timeout ->__fw_state_wait_common ->wait_for_completion_killable_timeout in __fw_state_wait_common, ... 93 ret = wait_for_completion_killable_timeout(&fw_st->completion, timeout); 94 if (ret != 0 && fw_st->status == FW_STATUS_ABORTED) 95 return -ENOENT; 96 if (!ret) 97 return -ETIMEDOUT; 98 99 return ret < 0 ? ret : 0; ----------------------------- thread 2#, write -1 to abort loading firmware_loading_store ->fw_load_abort ->__fw_load_abort ->fw_state_aborted ->__fw_state_set ->complete_all in __fw_state_set, ... 111 if (status == FW_STATUS_DONE || status == FW_STATUS_ABORTED) 112 complete_all(&fw_st->completion); ------------------------------------------- BTW,the double abort issue would not cause kernel panic or create an issue, but slow down it sometimes.The change is just a minor optimization. Signed-off-by:
Junyong Sun <sunjunyong@xiaomi.com> Acked-by:
Luis Chamberlain <mcgrof@kernel.org> Link: https://lore.kernel.org/r/1583202968-28792-1-git-send-email-sunjunyong@xiaomi.comSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Guoqing Jiang authored
[ Upstream commit 6b40bec3 ] Don't call quiesce(1) and quiesce(0) if array is already suspended, otherwise in level_store, the array is writable after mddev_detach in below part though the intention is to make array writable after resume. mddev_suspend(mddev); mddev_detach(mddev); ... mddev_resume(mddev); And it also causes calltrace as follows in [1]. [48005.653834] WARNING: CPU: 1 PID: 45380 at kernel/kthread.c:510 kthread_park+0x77/0x90 [...] [48005.653976] CPU: 1 PID: 45380 Comm: mdadm Tainted: G OE 5.4.10-arch1-1 #1 [48005.653979] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./J4105-ITX, BIOS P1.40 08/06/2018 [48005.653984] RIP: 0010:kthread_park+0x77/0x90 [48005.654015] Call Trace: [48005.654039] r5l_quiesce+0x3c/0x70 [raid456] [48005.654052] raid5_quiesce+0x228/0x2e0 [raid456] [48005.654073] mddev_detach+0x30/0x70 [md_mod] [48005.654090] level_store+0x202/0x670 [md_mod] [48005.654099] ? security_capable+0x40/0x60 [48005.654114] md_attr_store+0x7b/0xc0 [md_mod] [48005.654123] kernfs_fop_write+0xce/0x1b0 [48005.654132] vfs_write+0xb6/0x1a0 [48005.654138] ksys_write+0x67/0xe0 [48005.654146] do_syscall_64+0x4e/0x140 [48005.654155] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [48005.654161] RIP: 0033:0x7fa0c8737497 [1]: https://bugzilla.kernel.org/show_bug.cgi?id=206161Signed-off-by:
Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by:
Song Liu <songliubraving@fb.com> Signed-off-by:
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Marc Zyngier authored
[ Upstream commit 7809f701 ] On a very heavily loaded D05 with GICv4, I managed to trigger the following lockdep splat: [ 6022.598864] ====================================================== [ 6022.605031] WARNING: possible circular locking dependency detected [ 6022.611200] 5.6.0-rc4-00026-geee7c7b0f498 #680 Tainted: G E [ 6022.618061] ------------------------------------------------------ [ 6022.624227] qemu-system-aar/7569 is trying to acquire lock: [ 6022.629789] ffff042f97606808 (&p->pi_lock){-.-.}, at: try_to_wake_up+0x54/0x7a0 [ 6022.637102] [ 6022.637102] but task is already holding lock: [ 6022.642921] ffff002fae424cf0 (&irq_desc_lock_class){-.-.}, at: __irq_get_desc_lock+0x5c/0x98 [ 6022.651350] [ 6022.651350] which lock already depends on the new lock. [ 6022.651350] [ 6022.659512] [ 6022.659512] the existing dependency chain (in reverse order) is: [ 6022.666980] [ 6022.666980] -> #2 (&irq_desc_lock_class){-.-.}: [ 6022.672983] _raw_spin_lock_irqsave+0x50/0x78 [ 6022.677848] __irq_get_desc_lock+0x5c/0x98 [ 6022.682453] irq_set_vcpu_affinity+0x40/0xc0 [ 6022.687236] its_make_vpe_non_resident+0x6c/0xb8 [ 6022.692364] vgic_v4_put+0x54/0x70 [ 6022.696273] vgic_v3_put+0x20/0xd8 [ 6022.700183] kvm_vgic_put+0x30/0x48 [ 6022.704182] kvm_arch_vcpu_put+0x34/0x50 [ 6022.708614] kvm_sched_out+0x34/0x50 [ 6022.712700] __schedule+0x4bc/0x7f8 [ 6022.716697] schedule+0x50/0xd8 [ 6022.720347] kvm_arch_vcpu_ioctl_run+0x5f0/0x978 [ 6022.725473] kvm_vcpu_ioctl+0x3d4/0x8f8 [ 6022.729820] ksys_ioctl+0x90/0xd0 [ 6022.733642] __arm64_sys_ioctl+0x24/0x30 [ 6022.738074] el0_svc_common.constprop.3+0xa8/0x1e8 [ 6022.743373] do_el0_svc+0x28/0x88 [ 6022.747198] el0_svc+0x14/0x40 [ 6022.750761] el0_sync_handler+0x124/0x2b8 [ 6022.755278] el0_sync+0x140/0x180 [ 6022.759100] [ 6022.759100] -> #1 (&rq->lock){-.-.}: [ 6022.764143] _raw_spin_lock+0x38/0x50 [ 6022.768314] task_fork_fair+0x40/0x128 [ 6022.772572] sched_fork+0xe0/0x210 [ 6022.776484] copy_process+0x8c4/0x18d8 [ 6022.780742] _do_fork+0x88/0x6d8 [ 6022.784478] kernel_thread+0x64/0x88 [ 6022.788563] rest_init+0x30/0x270 [ 6022.792390] arch_call_rest_init+0x14/0x1c [ 6022.796995] start_kernel+0x498/0x4c4 [ 6022.801164] [ 6022.801164] -> #0 (&p->pi_lock){-.-.}: [ 6022.806382] __lock_acquire+0xdd8/0x15c8 [ 6022.810813] lock_acquire+0xd0/0x218 [ 6022.814896] _raw_spin_lock_irqsave+0x50/0x78 [ 6022.819761] try_to_wake_up+0x54/0x7a0 [ 6022.824018] wake_up_process+0x1c/0x28 [ 6022.828276] wakeup_softirqd+0x38/0x40 [ 6022.832533] __tasklet_schedule_common+0xc4/0xf0 [ 6022.837658] __tasklet_schedule+0x24/0x30 [ 6022.842176] check_irq_resend+0xc8/0x158 [ 6022.846609] irq_startup+0x74/0x128 [ 6022.850606] __enable_irq+0x6c/0x78 [ 6022.854602] enable_irq+0x54/0xa0 [ 6022.858431] its_make_vpe_non_resident+0xa4/0xb8 [ 6022.863557] vgic_v4_put+0x54/0x70 [ 6022.867469] kvm_arch_vcpu_blocking+0x28/0x38 [ 6022.872336] kvm_vcpu_block+0x48/0x490 [ 6022.876594] kvm_handle_wfx+0x18c/0x310 [ 6022.880938] handle_exit+0x138/0x198 [ 6022.885022] kvm_arch_vcpu_ioctl_run+0x4d4/0x978 [ 6022.890148] kvm_vcpu_ioctl+0x3d4/0x8f8 [ 6022.894494] ksys_ioctl+0x90/0xd0 [ 6022.898317] __arm64_sys_ioctl+0x24/0x30 [ 6022.902748] el0_svc_common.constprop.3+0xa8/0x1e8 [ 6022.908046] do_el0_svc+0x28/0x88 [ 6022.911871] el0_svc+0x14/0x40 [ 6022.915434] el0_sync_handler+0x124/0x2b8 [ 6022.919951] el0_sync+0x140/0x180 [ 6022.923773] [ 6022.923773] other info that might help us debug this: [ 6022.923773] [ 6022.931762] Chain exists of: [ 6022.931762] &p->pi_lock --> &rq->lock --> &irq_desc_lock_class [ 6022.931762] [ 6022.942101] Possible unsafe locking scenario: [ 6022.942101] [ 6022.948007] CPU0 CPU1 [ 6022.952523] ---- ---- [ 6022.957039] lock(&irq_desc_lock_class); [ 6022.961036] lock(&rq->lock); [ 6022.966595] lock(&irq_desc_lock_class); [ 6022.973109] lock(&p->pi_lock); [ 6022.976324] [ 6022.976324] *** DEADLOCK *** This is happening because we have a pending doorbell that requires retrigger. As SW retriggering is done in a tasklet, we trigger the circular dependency above. The easy cop-out is to provide a retrigger callback that doesn't require acquiring any extra lock. Signed-off-by:
Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200310184921.23552-5-maz@kernel.orgSigned-off-by:
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Neil Armstrong authored
[ Upstream commit 7ba6b09f ] In certain circumstances, the XHCI SuperSpeed instance in park mode can fail to recover, thus on Amlogic G12A/G12B/SM1 SoCs when there is high load on the single XHCI SuperSpeed instance, the controller can crash like: xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command. xhci-hcd xhci-hcd.0.auto: Host halt failed, -110 xhci-hcd xhci-hcd.0.auto: xHCI host controller not responding, assume dead xhci-hcd xhci-hcd.0.auto: xHCI host not responding to stop endpoint command. hub 2-1.1:1.0: hub_ext_port_status failed (err = -22) xhci-hcd xhci-hcd.0.auto: HC died; cleaning up usb 2-1.1-port1: cannot reset (err = -22) Setting the PARKMODE_DISABLE_SS bit in the DWC3_USB3_GUCTL1 mitigates the issue. The bit is described as : "When this bit is set to '1' all SS bus instances in park mode are disabled" Synopsys explains: The GUCTL1.PARKMODE_DISABLE_SS is only available in dwc_usb3 controller running in host mode. This should not be set for other IPs. This can be disabled by default based on IP, but I recommend to have a property to enable this feature for devices that need this. CC: Dongjin Kim <tobetter@gmail.com> Cc: Jianxin Pan <jianxin.pan@amlogic.com> Cc: Thinh Nguyen <thinhn@synopsys.com> Cc: Jun Li <lijun.kernel@gmail.com> Reported-by:
Tim <elatllat@gmail.com> Signed-off-by:
Neil Armstrong <narmstrong@baylibre.com> Signed-off-by:
Felipe Balbi <balbi@kernel.org> Signed-off-by:
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Dongchun Zhu authored
[ Upstream commit f1a64f56 ] From the measured hardware signal, OV5695 reset pin goes high for a short period of time during boot-up. From the sensor specification, the reset pin is active low and the DT binding defines the pin as active low, which means that the values set by the driver are inverted and thus the value requested in probe ends up high. Fix it by changing probe to request the reset GPIO initialized to high, which makes the initial state of the physical signal low. In addition, DOVDD rising must occur before DVDD rising from spec., but regulator_bulk_enable() API enables all the regulators asynchronously. Use an explicit loops of regulator_enable() instead. For power off sequence, it is required that DVDD falls first. Given the bulk API does not give any guarantee about the order of regulators, change the driver to use regulator_disable() instead. The sensor also requires a delay between reset high and first I2C transaction, which was assumed to be 8192 XVCLK cycles, but 1ms is recommended by the vendor. Fix this as well. Signed-off-by:
Dongchun Zhu <dongchun.zhu@mediatek.com> Signed-off-by:
Tomasz Figa <tfiga@chromium.org> Signed-off-by:
Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by:
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by:
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Sahitya Tummala authored
[ Upstream commit 30a2da7b ] There is a potential race between ioc_release_fn() and ioc_clear_queue() as shown below, due to which below kernel crash is observed. It also can result into use-after-free issue. context#1: context#2: ioc_release_fn() __ioc_clear_queue() gets the same icq ->spin_lock(&ioc->lock); ->spin_lock(&ioc->lock); ->ioc_destroy_icq(icq); ->list_del_init(&icq->q_node); ->call_rcu(&icq->__rcu_head, icq_free_icq_rcu); ->spin_unlock(&ioc->lock); ->ioc_destroy_icq(icq); ->hlist_del_init(&icq->ioc_node); This results into below crash as this memory is now used by icq->__rcu_head in context#1. There is a chance that icq could be free'd as well. 22150.386550: <6> Unable to handle kernel write to read-only memory at virtual address ffffffaa8d31ca50 ... Call trace: 22150.607350: <2> ioc_destroy_icq+0x44/0x110 22150.611202: <2> ioc_clear_queue+0xac/0x148 22150.615056: <2> blk_cleanup_queue+0x11c/0x1a0 22150.619174: <2> __scsi_remove_device+0xdc/0x128 22150.623465: <2> scsi_forget_host+0x2c/0x78 22150.627315: <2> scsi_remove_host+0x7c/0x2a0 22150.631257: <2> usb_stor_disconnect+0x74/0xc8 22150.635371: <2> usb_unbind_interface+0xc8/0x278 22150.639665: <2> device_release_driver_internal+0x198/0x250 22150.644897: <2> device_release_driver+0x24/0x30 22150.649176: <2> bus_remove_device+0xec/0x140 22150.653204: <2> device_del+0x270/0x460 22150.656712: <2> usb_disable_device+0x120/0x390 22150.660918: <2> usb_disconnect+0xf4/0x2e0 22150.664684: <2> hub_event+0xd70/0x17e8 22150.668197: <2> process_one_work+0x210/0x480 22150.672222: <2> worker_thread+0x32c/0x4c8 Fix this by adding a new ICQ_DESTROYED flag in ioc_destroy_icq() to indicate this icq is once marked as destroyed. Also, ensure __ioc_clear_queue() is accessing icq within rcu_read_lock/unlock so that icq doesn't get free'd up while it is still using it. Signed-off-by:
Sahitya Tummala <stummala@codeaurora.org> Co-developed-by:
Pradeep P V K <ppvk@codeaurora.org> Signed-off-by:
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Alexander Sverdlin authored
[ Upstream commit 87f2d1c6 ] irq_domain_alloc_irqs_hierarchy() has 3 call sites in the compilation unit but only one of them checks for the pointer which is being dereferenced inside the called function. Move the check into the function. This allows for catching the error instead of the following crash: Unable to handle kernel NULL pointer dereference at virtual address 00000000 PC is at 0x0 LR is at gpiochip_hierarchy_irq_domain_alloc+0x11f/0x140 ... [<c06c23ff>] (gpiochip_hierarchy_irq_domain_alloc) [<c0462a89>] (__irq_domain_alloc_irqs) [<c0462dad>] (irq_create_fwspec_mapping) [<c06c2251>] (gpiochip_to_irq) [<c06c1c9b>] (gpiod_to_irq) [<bf973073>] (gpio_irqs_init [gpio_irqs]) [<bf974048>] (gpio_irqs_exit+0xecc/0xe84 [gpio_irqs]) Code: bad PC value Signed-off-by:
Alexander Sverdlin <alexander.sverdlin@nokia.com> Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200306174720.82604-1-alexander.sverdlin@nokia.comSigned-off-by:
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Ard Biesheuvel authored
[ Upstream commit dd09fad9 ] Commit: 3a6b6c6f ("efi: Make EFI_MEMORY_ATTRIBUTES_TABLE initialization common across all architectures") moved the call to efi_memattr_init() from ARM specific to the generic EFI init code, in order to be able to apply the restricted permissions described in that table on x86 as well. We never enabled this feature fully on i386, and so mapping and reserving this table is pointless. However, due to the early call to memblock_reserve(), the memory bookkeeping gets confused to the point where it produces the splat below when we try to map the memory later on: ------------[ cut here ]------------ ioremap on RAM at 0x3f251000 - 0x3fa1afff WARNING: CPU: 0 PID: 0 at arch/x86/mm/ioremap.c:166 __ioremap_caller ... Modules linked in: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.20.0 #48 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015 EIP: __ioremap_caller.constprop.0+0x249/0x260 Code: 90 0f b7 05 4e 38 40 de 09 45 e0 e9 09 ff ff ff 90 8d 45 ec c6 05 ... EAX: 00000029 EBX: 00000000 ECX: de59c228 EDX: 00000001 ESI: 3f250fff EDI: 00000000 EBP: de3edf20 ESP: de3edee0 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00200296 CR0: 80050033 CR2: ffd17000 CR3: 1e58c000 CR4: 00040690 Call Trace: ioremap_cache+0xd/0x10 ? old_map_region+0x72/0x9d old_map_region+0x72/0x9d efi_map_region+0x8/0xa efi_enter_virtual_mode+0x260/0x43b start_kernel+0x329/0x3aa i386_start_kernel+0xa7/0xab startup_32_smp+0x164/0x168 ---[ end trace e15ccf6b9f356833 ]--- Let's work around this by disregarding the memory attributes table altogether on i386, which does not result in a loss of functionality or protection, given that we never consumed the contents. Fixes: 3a6b6c6f ("efi: Make EFI_MEMORY_ATTRIBUTES_TABLE ... ") Tested-by:
Arvind Sankar <nivedita@alum.mit.edu> Signed-off-by:
Ard Biesheuvel <ardb@kernel.org> Signed-off-by:
Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20200304165917.5893-1-ardb@kernel.org Link: https://lore.kernel.org/r/20200308080859.21568-21-ardb@kernel.orgSigned-off-by:
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Arvind Sankar authored
[ Upstream commit 81a34892 ] The load address is compared with LOAD_PHYSICAL_ADDR using a signed comparison currently (using jge instruction). When loading a 64-bit kernel using the new efi32_pe_entry() point added by: 97aa2765 ("efi/x86: Add true mixed mode entry point into .compat section") using Qemu with -m 3072, the firmware actually loads us above 2Gb, resulting in a very early crash. Use the JAE instruction to perform a unsigned comparison instead, as physical addresses should be considered unsigned. Signed-off-by:
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Bob Peterson authored
[ Upstream commit df5db5f9 ] Before this patch, run_queue would demote glocks based on whether there are any more holders. But if the glock has pending revokes that haven't been written to the media, giving up the glock might end in file system corruption if the revokes never get written due to io errors, node crashes and fences, etc. In that case, another node will replay the metadata blocks associated with the glock, but because the revoke was never written, it could replay that block even though the glock had since been granted to another node who might have made changes. This patch changes the logic in run_queue so that it never demotes a glock until its count of pending revokes reaches zero. Signed-off-by:
Bob Peterson <rpeterso@redhat.com> Reviewed-by:
Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by:
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chenqiwu authored
[ Upstream commit 8a57d6d4 ] There is a potential mem leak when pstore_init_fs failed, since the pstore compression maybe unlikey to initialized successfully. We must clean up the allocation once this unlikey issue happens. Signed-off-by:
chenqiwu <chenqiwu@xiaomi.com> Link: https://lore.kernel.org/r/1581068800-13817-1-git-send-email-qiwuchen55@gmail.comSigned-off-by:
Kees Cook <keescook@chromium.org> Signed-off-by:
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John Garry authored
[ Upstream commit 1d72f7ae ] If the call to scsi_add_host_with_dma() in ata_scsi_add_hosts() fails, then we may get use-after-free KASAN warns: ================================================================== BUG: KASAN: use-after-free in kobject_put+0x24/0x180 Read of size 1 at addr ffff0026b8c80364 by task swapper/0/1 CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 5.6.0-rc3-00004-g5a71b206ea82-dirty #1765 Hardware name: Huawei TaiShan 200 (Model 2280)/BC82AMDD, BIOS 2280-V2 CS V3.B160.01 02/24/2020 Call trace: dump_backtrace+0x0/0x298 show_stack+0x14/0x20 dump_stack+0x118/0x190 print_address_description.isra.9+0x6c/0x3b8 __kasan_report+0x134/0x23c kasan_report+0xc/0x18 __asan_load1+0x5c/0x68 kobject_put+0x24/0x180 put_device+0x10/0x20 scsi_host_put+0x10/0x18 ata_devres_release+0x74/0xb0 release_nodes+0x2d0/0x470 devres_release_all+0x50/0x78 really_probe+0x2d4/0x560 driver_probe_device+0x7c/0x148 device_driver_attach+0x94/0xa0 __driver_attach+0xa8/0x110 bus_for_each_dev+0xe8/0x158 driver_attach+0x30/0x40 bus_add_driver+0x220/0x2e0 driver_register+0xbc/0x1d0 __pci_register_driver+0xbc/0xd0 ahci_pci_driver_init+0x20/0x28 do_one_initcall+0xf0/0x608 kernel_init_freeable+0x31c/0x384 kernel_init+0x10/0x118 ret_from_fork+0x10/0x18 Allocated by task 5: save_stack+0x28/0xc8 __kasan_kmalloc.isra.8+0xbc/0xd8 kasan_kmalloc+0xc/0x18 __kmalloc+0x1a8/0x280 scsi_host_alloc+0x44/0x678 ata_scsi_add_hosts+0x74/0x268 ata_host_register+0x228/0x488 ahci_host_activate+0x1c4/0x2a8 ahci_init_one+0xd18/0x1298 local_pci_probe+0x74/0xf0 work_for_cpu_fn+0x2c/0x48 process_one_work+0x488/0xc08 worker_thread+0x330/0x5d0 kthread+0x1c8/0x1d0 ret_from_fork+0x10/0x18 Freed by task 5: save_stack+0x28/0xc8 __kasan_slab_free+0x118/0x180 kasan_slab_free+0x10/0x18 slab_free_freelist_hook+0xa4/0x1a0 kfree+0xd4/0x3a0 scsi_host_dev_release+0x100/0x148 device_release+0x7c/0xe0 kobject_put+0xb0/0x180 put_device+0x10/0x20 scsi_host_put+0x10/0x18 ata_scsi_add_hosts+0x210/0x268 ata_host_register+0x228/0x488 ahci_host_activate+0x1c4/0x2a8 ahci_init_one+0xd18/0x1298 local_pci_probe+0x74/0xf0 work_for_cpu_fn+0x2c/0x48 process_one_work+0x488/0xc08 worker_thread+0x330/0x5d0 kthread+0x1c8/0x1d0 ret_from_fork+0x10/0x18 There is also refcount issue, as well: WARNING: CPU: 1 PID: 1 at lib/refcount.c:28 refcount_warn_saturate+0xf8/0x170 The issue is that we make an erroneous extra call to scsi_host_put() for that host: So in ahci_init_one()->ata_host_alloc_pinfo()->ata_host_alloc(), we setup a device release method - ata_devres_release() - which intends to release the SCSI hosts: static void ata_devres_release(struct device *gendev, void *res) { ... for (i = 0; i < host->n_ports; i++) { struct ata_port *ap = host->ports[i]; if (!ap) continue; if (ap->scsi_host) scsi_host_put(ap->scsi_host); } ... } However in the ata_scsi_add_hosts() error path, we also call scsi_host_put() for the SCSI hosts. Fix by removing the the scsi_host_put() calls in ata_scsi_add_hosts() and leave this to ata_devres_release(). Fixes: f3187195 ("libata: separate out ata_host_alloc() and ata_host_register()") Signed-off-by:
John Garry <john.garry@huawei.com> Signed-off-by:
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Matt Ranostay authored
[ Upstream commit 64d4fc99 ] Fix build fault when CONFIG_HWMON is a module, and CONFIG_VIDEO_I2C as builtin. This is due to 'imply hwmon' in the respective Kconfig. Issue build log: ld: drivers/media/i2c/video-i2c.o: in function `amg88xx_hwmon_init': video-i2c.c:(.text+0x2e1): undefined reference to `devm_hwmon_device_register_with_info Cc: rdunlap@infradead.org Fixes: acbea679 (media: video-i2c: add hwmon support for amg88xx) Signed-off-by:
Matt Ranostay <matt.ranostay@konsulko.com> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
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Logan Gunthorpe authored
[ Upstream commit efbdc769 ] The call to init_completion() in mrpc_queue_cmd() can theoretically race with the call to poll_wait() in switchtec_dev_poll(). poll() write() switchtec_dev_poll() switchtec_dev_write() poll_wait(&s->comp.wait); mrpc_queue_cmd() init_completion(&s->comp) init_waitqueue_head(&s->comp.wait) To my knowledge, no one has hit this bug. Fix this by using reinit_completion() instead of init_completion() in mrpc_queue_cmd(). Fixes: 080b47de ("MicroSemi Switchtec management interface driver") Reported-by:
Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by:
Logan Gunthorpe <logang@deltatee.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Link: https://lkml.kernel.org/r/20200313183608.2646-1-logang@deltatee.comSigned-off-by:
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Andy Lutomirski authored
[ Upstream commit 630b99ab ] If AT_SYSINFO is not present, don't try to call a NULL pointer. Reported-by:
kbuild test robot <lkp@intel.com> Signed-off-by:
Andy Lutomirski <luto@kernel.org> Signed-off-by:
Borislav Petkov <bp@suse.de> Link: https://lkml.kernel.org/r/faaf688265a7e1a5b944d6f8bc0f6368158306d3.1584052409.git.luto@kernel.orgSigned-off-by:
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Michael Wang authored
[ Upstream commit 26cf5222 ] During our testing, we found a case that shares no longer working correctly, the cgroup topology is like: /sys/fs/cgroup/cpu/A (shares=102400) /sys/fs/cgroup/cpu/A/B (shares=2) /sys/fs/cgroup/cpu/A/B/C (shares=1024) /sys/fs/cgroup/cpu/D (shares=1024) /sys/fs/cgroup/cpu/D/E (shares=1024) /sys/fs/cgroup/cpu/D/E/F (shares=1024) The same benchmark is running in group C & F, no other tasks are running, the benchmark is capable to consumed all the CPUs. We suppose the group C will win more CPU resources since it could enjoy all the shares of group A, but it's F who wins much more. The reason is because we have group B with shares as 2, since A->cfs_rq.load.weight == B->se.load.weight == B->shares/nr_cpus, so A->cfs_rq.load.weight become very small. And in calc_group_shares() we calculate shares as: load = max(scale_load_down(cfs_rq->load.weight), cfs_rq->avg.load_avg); shares = (tg_shares * load) / tg_weight; Since the 'cfs_rq->load.weight' is too small, the load become 0 after scale down, although 'tg_shares' is 102400, shares of the se which stand for group A on root cfs_rq become 2. While the se of D on root cfs_rq is far more bigger than 2, so it wins the battle. Thus when scale_load_down() scale real weight down to 0, it's no longer telling the real story, the caller will have the wrong information and the calculation will be buggy. This patch add check in scale_load_down(), so the real weight will be >= MIN_SHARES after scale, after applied the group C wins as expected. Suggested-by:
Michael Wang <yun.wang@linux.alibaba.com> Signed-off-by:
Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/38e8e212-59a1-64b2-b247-b6d0b52d8dc1@linux.alibaba.comSigned-off-by:
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Sungbo Eo authored
[ Upstream commit 486562da ] Enclose the chained handler with chained_irq_{enter,exit}(), so that the muxed interrupts get properly acked. This patch also fixes a reboot bug on OX820 SoC, where the jiffies timer interrupt is never acked. The kernel waits a clock tick forever in calibrate_delay_converge(), which leads to a boot hang. Fixes: c41b16f8 ("ARM: integrator/versatile: consolidate FPGA IRQ handling code") Signed-off-by:
Sungbo Eo <mans0n@gorani.run> Signed-off-by:
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Konstantin Khlebnikov authored
[ Upstream commit e74d93e9 ] Field bdi->io_pages added in commit 9491ae4a ("mm: don't cap request size based on read-ahead setting") removes unneeded split of read requests. Stacked drivers do not call blk_queue_max_hw_sectors(). Instead they set limits of their devices by blk_set_stacking_limits() + disk_stack_limits(). Field bio->io_pages stays zero until user set max_sectors_kb via sysfs. This patch updates io_pages after merging limits in disk_stack_limits(). Commit c6d6e9b0 ("dm: do not allow readahead to limit IO size") fixed the same problem for device-mapper devices, this one fixes MD RAIDs. Fixes: 9491ae4a ("mm: don't cap request size based on read-ahead setting") Reviewed-by:
Paul Menzel <pmenzel@molgen.mpg.de> Reviewed-by:
Bob Liu <bob.liu@oracle.com> Signed-off-by:
Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Signed-off-by:
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Thomas Hellstrom authored
[ Upstream commit 6db73f17 ] When SEV or SME is enabled and active, vm_get_page_prot() typically returns with the encryption bit set. This means that users of pgprot_modify(, vm_get_page_prot()) (mprotect_fixup(), do_mmap()) end up with a value of vma->vm_pg_prot that is not consistent with the intended protection of the PTEs. This is also important for fault handlers that rely on the VMA vm_page_prot to set the page protection. Fix this by not allowing pgprot_modify() to change the encryption bit, similar to how it's done for PAT bits. Signed-off-by:
Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by:
Dave Hansen <dave.hansen@linux.intel.com> Acked-by:
Tom Lendacky <thomas.lendacky@amd.com> Link: https://lkml.kernel.org/r/20200304114527.3636-2-thomas_os@shipmail.orgSigned-off-by:
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Mathias Nyman authored
[ Upstream commit 72ae1947 ] Bail out early if the xHC host needs to be reset at resume but driver can't access xHC PCI registers. If xhci driver already fails to reset the controller then there is no point in attempting to free, re-initialize, re-allocate and re-start the host. If failure to access the host is detected later, failing the resume, xhci interrupts will be double freed when remove is called. Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Link: https://lore.kernel.org/r/20200312144517.1593-2-mathias.nyman@linux.intel.comSigned-off-by:
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Alexey Dobriyan authored
[ Upstream commit ff770422 ] Steps to reproduce: BLKRESETZONE zone 0 // force EIO pwrite(fd, buf, 4096, 4096); [issue more IO including zone ioctls] It will start failing randomly including IO to unrelated zones because of ->error "reuse". Trigger can be partition detection as well if test is not run immediately which is even more entertaining. The fix is of course to clear ->error where necessary. Reviewed-by:
Christoph Hellwig <hch@lst.de> Signed-off-by:
Alexey Dobriyan (SK hynix) <adobriyan@gmail.com> Signed-off-by:
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Bart Van Assche authored
[ Upstream commit 9b03b713 ] If null_add_dev() fails then null_del_dev() is called with a NULL argument. Make null_del_dev() handle this scenario correctly. This patch fixes the following KASAN complaint: null-ptr-deref in null_del_dev+0x28/0x280 [null_blk] Read of size 8 at addr 0000000000000000 by task find/1062 Call Trace: dump_stack+0xa5/0xe6 __kasan_report.cold+0x65/0x99 kasan_report+0x16/0x20 __asan_load8+0x58/0x90 null_del_dev+0x28/0x280 [null_blk] nullb_group_drop_item+0x7e/0xa0 [null_blk] client_drop_item+0x53/0x80 [configfs] configfs_rmdir+0x395/0x4e0 [configfs] vfs_rmdir+0xb6/0x220 do_rmdir+0x238/0x2c0 __x64_sys_unlinkat+0x75/0x90 do_syscall_64+0x6f/0x2f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Signed-off-by:
Bart Van Assche <bvanassche@acm.org> Reviewed-by:
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Cc: Johannes Thumshirn <jth@kernel.org> Cc: Hannes Reinecke <hare@suse.com> Cc: Ming Lei <ming.lei@redhat.com> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by:
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Bart Van Assche authored
[ Upstream commit 2004bfde ] If null_add_dev() fails, clear dev->nullb. This patch fixes the following KASAN complaint: BUG: KASAN: use-after-free in nullb_device_submit_queues_store+0xcf/0x160 [null_blk] Read of size 8 at addr ffff88803280fc30 by task check/8409 Call Trace: dump_stack+0xa5/0xe6 print_address_description.constprop.0+0x26/0x260 __kasan_report.cold+0x7b/0x99 kasan_report+0x16/0x20 __asan_load8+0x58/0x90 nullb_device_submit_queues_store+0xcf/0x160 [null_blk] configfs_write_file+0x1c4/0x250 [configfs] __vfs_write+0x4c/0x90 vfs_write+0x145/0x2c0 ksys_write+0xd7/0x180 __x64_sys_write+0x47/0x50 do_syscall_64+0x6f/0x2f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff370926317 Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24 RSP: 002b:00007fff2dd2da48 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007ff370926317 RDX: 0000000000000002 RSI: 0000559437ef23f0 RDI: 0000000000000001 RBP: 0000559437ef23f0 R08: 000000000000000a R09: 0000000000000001 R10: 0000559436703471 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ff370a006a0 R14: 00007ff370a014a0 R15: 00007ff370a008a0 Allocated by task 8409: save_stack+0x23/0x90 __kasan_kmalloc.constprop.0+0xcf/0xe0 kasan_kmalloc+0xd/0x10 kmem_cache_alloc_node_trace+0x129/0x4c0 null_add_dev+0x24a/0xe90 [null_blk] nullb_device_power_store+0x1b6/0x270 [null_blk] configfs_write_file+0x1c4/0x250 [configfs] __vfs_write+0x4c/0x90 vfs_write+0x145/0x2c0 ksys_write+0xd7/0x180 __x64_sys_write+0x47/0x50 do_syscall_64+0x6f/0x2f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8409: save_stack+0x23/0x90 __kasan_slab_free+0x112/0x160 kasan_slab_free+0x12/0x20 kfree+0xdf/0x250 null_add_dev+0xaf3/0xe90 [null_blk] nullb_device_power_store+0x1b6/0x270 [null_blk] configfs_write_file+0x1c4/0x250 [configfs] __vfs_write+0x4c/0x90 vfs_write+0x145/0x2c0 ksys_write+0xd7/0x180 __x64_sys_write+0x47/0x50 do_syscall_64+0x6f/0x2f0 entry_SYSCALL_64_after_hwframe+0x49/0xbe Fixes: 2984c868 ("nullb: factor disk parameters") Signed-off-by:
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James Morse authored
[ Upstream commit 6ded0b61 ] SDEI has private events that must be registered on each CPU. When CPUs come and go they must re-register and re-enable their private events. Each event has flags to indicate whether this should happen to protect against an event being registered on a CPU coming online, while all the others are unregistering the event. These flags are protected by the sdei_list_lock spinlock, because the cpuhp callbacks can't take the mutex. Hibernate needs to unregister all events, but keep the in-memory re-register and re-enable as they are. sdei_unregister_shared() takes the spinlock to walk the list, then calls _sdei_event_unregister() on each shared event. _sdei_event_unregister() tries to take the same spinlock to update re-register and re-enable. This doesn't go so well. Push the re-register and re-enable updates out to their callers. sdei_unregister_shared() doesn't want these values updated, so doesn't need to do anything. This also fixes shared events getting lost over hibernate as this path made them look unregistered. Fixes: da351827 ("firmware: arm_sdei: Add support for CPU and system power states") Reported-by:
Liguang Zhang <zhangliguang@linux.alibaba.com> Signed-off-by:
James Morse <james.morse@arm.com> Signed-off-by:
Catalin Marinas <catalin.marinas@arm.com> Signed-off-by:
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Stephan Gerhold authored
[ Upstream commit c50cc6dc ] Some older MSM8916 Venus firmware versions also seem to indicate support for encoding HEVC, even though they really can't. This will lead to errors later because hfi_session_init() fails in this case. HEVC is already ignored for "dec_codecs", so add the same for "enc_codecs" to make these old firmware versions work correctly. Signed-off-by:
Stephan Gerhold <stephan@gerhold.net> Signed-off-by:
Stanimir Varbanov <stanimir.varbanov@linaro.org> Signed-off-by:
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Christoph Niedermaier authored
[ Upstream commit 36eb7dc1 ] imx6ul_opp_check_speed_grading is called for both i.MX6UL and i.MX6ULL. Since the i.MX6ULL was introduced to a separate ocotp compatible node later, it is possible that the i.MX6ULL has also dtbs with "fsl,imx6ull-ocotp". On a system without nvmem-cell speed grade a missing check on this node causes a driver fail without considering the cpu speed grade. This patch prevents unwanted cpu overclocking on i.MX6ULL with compatible node "fsl,imx6ull-ocotp" in old dtbs without nvmem-cell speed grade. Fixes: 2733fb0d ("cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull") Signed-off-by:
Christoph Niedermaier <cniedermaier@dh-electronics.com> Signed-off-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
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Alain Volmat authored
[ Upstream commit f491c668 ] Fix a missing struct parameter description to allow warning free W=1 compilation. Signed-off-by:
Alain Volmat <avolmat@me.com> Reviewed-by:
Patrice Chotard <patrice.chotard@st.com> Signed-off-by:
Wolfram Sang <wsa@the-dreams.de> Signed-off-by:
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Xu Wang authored
[ Upstream commit bcaeb886 ] In qlcnic_83xx_get_reset_instruction_template, the variable of null test is bad, so correct it. Signed-off-by:
Xu Wang <vulab@iscas.ac.cn> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Raju Rangoju authored
[ Upstream commit 50e0d28d ] cxgb4_ptp_fineadjtime() doesn't pass the signedness of offset delta in FW_PTP_CMD. Fix it by passing correct sign. Signed-off-by:
Raju Rangoju <rajur@chelsio.com> Signed-off-by:
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Luo bin authored
[ Upstream commit 0da7c322 ] the second input parameter of wait_for_completion_timeout should be jiffies instead of millisecond Signed-off-by:
Luo bin <luobin9@huawei.com> Signed-off-by:
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Luo bin authored
[ Upstream commit 96758117 ] it's unreliable for fw to check whether IO is stopped, so driver wait for enough time to ensure IO process is done in hw before freeing resources Signed-off-by:
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Zheng Wei authored
[ Upstream commit b317538c ] printk in macro vxge_debug_ll uses __VA_ARGS__ without "##" prefix, it causes a build error when there is no variable arguments(e.g. only fmt is specified.). Signed-off-by:
Zheng Wei <wei.zheng@vivo.com> Signed-off-by:
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Ondrej Jirman authored
[ Upstream commit a43ab30d ] When doing a 16-bit read that returns data in the MSB byte, the RSB_DATA register will keep the MSB byte unchanged when doing the following 8-bit read. sunxi_rsb_read() will then return a result that contains high byte from 16-bit read mixed with the 8-bit result. The consequence is that after this happens the PMIC's regmap will look like this: (0x33 is the high byte from the 16-bit read) % cat /sys/kernel/debug/regmap/sunxi-rsb-3a3/registers 00: 33 01: 33 02: 33 03: 33 04: 33 05: 33 06: 33 07: 33 08: 33 09: 33 0a: 33 0b: 33 0c: 33 0d: 33 0e: 33 [snip] Fix this by masking the result of the read with the correct mask based on the size of the read. There are no 16-bit users in the mainline kernel, so this doesn't need to get into the stable tree. Signed-off-by:
Ondrej Jirman <megous@megous.com> Acked-by:
Chen-Yu Tsai <wens@csie.org> Signed-off-by:
Maxime Ripard <maxime@cerno.tech> Signed-off-by:
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Ondrej Jirman authored
[ Upstream commit a4055095 ] Lowering the voltage solves the quick image degradation over time (minutes), that was probably caused by overheating. Signed-off-by:
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- 13 Apr, 2020 3 commits
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Greg Kroah-Hartman authored
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Rob Clark authored
commit 3de433c5 upstream. [subject was: drm/msm: shake fist angrily at dma-mapping] So, using dma_sync_* for our cache needs works out w/ dma iommu ops, but it falls appart with dma direct ops. The problem is that, depending on display generation, we can have either set of dma ops (mdp4 and dpu have iommu wired to mdss node, which maps to toplevel drm device, but mdp5 has iommu wired up to the mdp sub-node within mdss). Fixes this splat on mdp5 devices: Unable to handle kernel paging request at virtual address ffffffff80000000 Mem abort info: ESR = 0x96000144 Exception class = DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000144 CM = 1, WnR = 1 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000000810e4000 [ffffffff80000000] pgd=0000000000000000 Internal error: Oops: 96000144 [#1] SMP Modules linked in: btqcomsmd btqca bluetooth cfg80211 ecdh_generic ecc rfkill libarc4 panel_simple msm wcnss_ctrl qrtr_smd drm_kms_helper venus_enc venus_dec videobuf2_dma_sg videobuf2_memops drm venus_core ipv6 qrtr qcom_wcnss_pil v4l2_mem2mem qcom_sysmon videobuf2_v4l2 qmi_helpers videobuf2_common crct10dif_ce mdt_loader qcom_common videodev qcom_glink_smem remoteproc bmc150_accel_i2c bmc150_magn_i2c bmc150_accel_core bmc150_magn snd_soc_lpass_apq8016 snd_soc_msm8916_analog mms114 mc nf_defrag_ipv6 snd_soc_lpass_cpu snd_soc_apq8016_sbc industrialio_triggered_buffer kfifo_buf snd_soc_lpass_platform snd_soc_msm8916_digital drm_panel_orientation_quirks CPU: 2 PID: 33 Comm: kworker/2:1 Not tainted 5.3.0-rc2 #1 Hardware name: Samsung Galaxy A5U (EUR) (DT) Workqueue: events deferred_probe_work_func pstate: 80000005 (Nzcv daif -PAN -UAO) pc : __clean_dcache_area_poc+0x20/0x38 lr : arch_sync_dma_for_device+0x28/0x30 sp : ffff0000115736a0 x29: ffff0000115736a0 x28: 0000000000000001 x27: ffff800074830800 x26: ffff000011478000 x25: 0000000000000000 x24: 0000000000000001 x23: ffff000011478a98 x22: ffff800009fd1c10 x21: 0000000000000001 x20: ffff800075ad0a00 x19: 0000000000000000 x18: ffff0000112b2000 x17: 0000000000000000 x16: 0000000000000000 x15: 00000000fffffff0 x14: ffff000011455d70 x13: 0000000000000000 x12: 0000000000000028 x11: 0000000000000001 x10: ffff00001106c000 x9 : ffff7e0001d6b380 x8 : 0000000000001000 x7 : ffff7e0001d6b380 x6 : ffff7e0001d6b382 x5 : 0000000000000000 x4 : 0000000000001000 x3 : 000000000000003f x2 : 0000000000000040 x1 : ffffffff80001000 x0 : ffffffff80000000 Call trace: __clean_dcache_area_poc+0x20/0x38 dma_direct_sync_sg_for_device+0xb8/0xe8 get_pages+0x22c/0x250 [msm] msm_gem_get_and_pin_iova+0xdc/0x168 [msm] ... Fixes the combination of two patches: Fixes: 0036bc73 (drm/msm: stop abusing dma_map/unmap for cache) Fixes: 449fa54d (dma-direct: correct the physical addr in dma_direct_sync_sg_for_cpu/device) Tested-by:
Rob Clark <robdclark@chromium.org> [seanpaul changed subject to something more desriptive] Signed-off-by:
Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190730214633.17820-1-robdclark@gmail.com Cc: nobuhiro1.iwamatsu@toshiba.co.jp Signed-off-by:
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Hans Verkuil authored
commit a4c30a48 upstream. When parsing the reply of a DP_REMOTE_DPCD_READ DPCD command the result is wrong due to a missing idx increment. This was never noticed since DP_REMOTE_DPCD_READ is currently not used, but if you enable it, then it is all wrong. Signed-off-by:
Hans Verkuil <hans.verkuil@cisco.com> Reviewed-by:
Lyude Paul <lyude@redhat.com> Acked-by:
Alex Deucher <alexander.deucher@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/e72ddac2-1dc0-100a-d816-9ac98ac009dd@xs4all.nlSigned-off-by:
Lee Jones <lee.jones@linaro.org> Signed-off-by:
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