1. 16 Feb, 2016 3 commits
    • Mauro Carvalho Chehab's avatar
      [media] rc-core: don't lock device at rc_register_device() · c73bbaa4
      Mauro Carvalho Chehab authored
      The mutex lock at rc_register_device() was added by commit 08aeb7c9
      ("[media] rc: add locking to fix register/show race").
      
      It is meant to avoid race issues when trying to open a sysfs file while
      the RC register didn't complete.
      
      Adding a lock there causes troubles, as detected by the Kernel lock
      debug instrumentation at the Kernel:
      
          ======================================================
          [ INFO: possible circular locking dependency detected ]
          4.5.0-rc3+ #46 Not tainted
          -------------------------------------------------------
          systemd-udevd/2681 is trying to acquire lock:
           (s_active#171){++++.+}, at: [<ffffffff8171a115>] kernfs_remove_by_name_ns+0x45/0xa0
      
          but task is already holding lock:
           (&dev->lock){+.+.+.}, at: [<ffffffffa0724def>] rc_register_device+0xb2f/0x1450 [rc_core]
      
          which lock already depends on the new lock.
      
          the existing dependency chain (in reverse order) is:
      
          -> #1 (&dev->lock){+.+.+.}:
                 [<ffffffff8124817d>] lock_acquire+0x13d/0x320
                 [<ffffffff822de966>] mutex_lock_nested+0xb6/0x860
                 [<ffffffffa0721f2b>] show_protocols+0x3b/0x3f0 [rc_core]
                 [<ffffffff81cdaba5>] dev_attr_show+0x45/0xc0
                 [<ffffffff8171f1b3>] sysfs_kf_seq_show+0x203/0x3c0
                 [<ffffffff8171a6a1>] kernfs_seq_show+0x121/0x1b0
                 [<ffffffff81617c71>] seq_read+0x2f1/0x1160
                 [<ffffffff8171c911>] kernfs_fop_read+0x321/0x460
                 [<ffffffff815abc20>] __vfs_read+0xe0/0x3d0
                 [<ffffffff815ae90e>] vfs_read+0xde/0x2d0
                 [<ffffffff815b1d01>] SyS_read+0x111/0x230
                 [<ffffffff822e8636>] entry_SYSCALL_64_fastpath+0x16/0x76
      
          -> #0 (s_active#171){++++.+}:
                 [<ffffffff81244f24>] __lock_acquire+0x4304/0x5990
                 [<ffffffff8124817d>] lock_acquire+0x13d/0x320
                 [<ffffffff81717d3a>] __kernfs_remove+0x58a/0x810
                 [<ffffffff8171a115>] kernfs_remove_by_name_ns+0x45/0xa0
                 [<ffffffff81721592>] remove_files.isra.0+0x72/0x190
                 [<ffffffff8172174b>] sysfs_remove_group+0x9b/0x150
                 [<ffffffff81721854>] sysfs_remove_groups+0x54/0xa0
                 [<ffffffff81cd97d0>] device_remove_attrs+0xb0/0x140
                 [<ffffffff81cdb27c>] device_del+0x38c/0x6b0
                 [<ffffffffa0724b8b>] rc_register_device+0x8cb/0x1450 [rc_core]
                 [<ffffffffa1326a7b>] dvb_usb_remote_init+0x66b/0x14d0 [dvb_usb]
                 [<ffffffffa1321c81>] dvb_usb_device_init+0xf21/0x1860 [dvb_usb]
                 [<ffffffffa13517dc>] dib0700_probe+0x14c/0x410 [dvb_usb_dib0700]
                 [<ffffffff81dbb1dd>] usb_probe_interface+0x45d/0x940
                 [<ffffffff81ce7e7a>] driver_probe_device+0x21a/0xc30
                 [<ffffffff81ce89b1>] __driver_attach+0x121/0x160
                 [<ffffffff81ce21bf>] bus_for_each_dev+0x11f/0x1a0
                 [<ffffffff81ce6cdd>] driver_attach+0x3d/0x50
                 [<ffffffff81ce5df9>] bus_add_driver+0x4c9/0x770
                 [<ffffffff81cea39c>] driver_register+0x18c/0x3b0
                 [<ffffffff81db6e98>] usb_register_driver+0x1f8/0x440
                 [<ffffffffa074001e>] dib0700_driver_init+0x1e/0x1000 [dvb_usb_dib0700]
                 [<ffffffff810021b1>] do_one_initcall+0x141/0x300
                 [<ffffffff8144d8eb>] do_init_module+0x1d0/0x5ad
                 [<ffffffff812f27b6>] load_module+0x6666/0x9ba0
                 [<ffffffff812f5fe8>] SyS_finit_module+0x108/0x130
                 [<ffffffff822e8636>] entry_SYSCALL_64_fastpath+0x16/0x76
      
          other info that might help us debug this:
      
           Possible unsafe locking scenario:
      
                 CPU0                    CPU1
                 ----                    ----
            lock(&dev->lock);
                                         lock(s_active#171);
                                         lock(&dev->lock);
            lock(s_active#171);
      
           *** DEADLOCK ***
      
          3 locks held by systemd-udevd/2681:
           #0:  (&dev->mutex){......}, at: [<ffffffff81ce8933>] __driver_attach+0xa3/0x160
           #1:  (&dev->mutex){......}, at: [<ffffffff81ce8941>] __driver_attach+0xb1/0x160
           #2:  (&dev->lock){+.+.+.}, at: [<ffffffffa0724def>] rc_register_device+0xb2f/0x1450 [rc_core]
      
      In this specific case, some error happened during device init,
      causing IR to be disabled.
      
      Let's fix it by adding a var that will tell when the device is
      initialized. Any calls before that will return a -EINVAL.
      
      That should prevent the race issues.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
      c73bbaa4
    • Mauro Carvalho Chehab's avatar
      [media] v4l2-mc: add a routine to create USB media_device · eee7d353
      Mauro Carvalho Chehab authored
      Instead of copying exactly the same code on all USB devices,
      add an ancillary routine that will create and fill the
      struct media_device with the values imported from the USB
      device.
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
      eee7d353
    • Mauro Carvalho Chehab's avatar
      [media] v4l2-mc.h: prevent it for being included twice · db152276
      Mauro Carvalho Chehab authored
      Don't let it be included twice, to avoid compiler issues.
      Acked-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
      Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
      db152276
  2. 11 Feb, 2016 3 commits
  3. 10 Feb, 2016 25 commits
  4. 09 Feb, 2016 1 commit
    • Mauro Carvalho Chehab's avatar
      Merge tag 'v4.5-rc3' into patchwork · 85e91f80
      Mauro Carvalho Chehab authored
      Linux 4.5-rc3
      
      * tag 'v4.5-rc3': (644 commits)
        Linux 4.5-rc3
        epoll: restrict EPOLLEXCLUSIVE to POLLIN and POLLOUT
        radix-tree: fix oops after radix_tree_iter_retry
        MAINTAINERS: trim the file triggers for ABI/API
        dax: dirty inode only if required
        thp: make deferred_split_scan() work again
        mm: replace vma_lock_anon_vma with anon_vma_lock_read/write
        ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup
        um: asm/page.h: remove the pte_high member from struct pte_t
        mm, hugetlb: don't require CMA for runtime gigantic pages
        mm/hugetlb: fix gigantic page initialization/allocation
        mm: downgrade VM_BUG in isolate_lru_page() to warning
        mempolicy: do not try to queue pages from !vma_migratable()
        mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress
        vmstat: make vmstat_update deferrable
        mm, vmstat: make quiet_vmstat lighter
        mm/Kconfig: correct description of DEFERRED_STRUCT_PAGE_INIT
        memblock: don't mark memblock_phys_mem_size() as __init
        dump_stack: avoid potential deadlocks
        mm: validate_mm browse_rb SMP race condition
        ...
      85e91f80
  5. 07 Feb, 2016 5 commits
    • Linus Torvalds's avatar
      Linux 4.5-rc3 · 388f7b1d
      Linus Torvalds authored
      388f7b1d
    • Linus Torvalds's avatar
      Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · c17dfb01
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "The first real batch of fixes for this release cycle, so there are a
        few more than usual.
      
        Most of these are fixes and tweaks to board support (DT bugfixes,
        etc).  I've also picked up a couple of small cleanups that seemed
        innocent enough that there was little reason to wait (const/
        __initconst and Kconfig deps).
      
        Quite a bit of the changes on OMAP were due to fixes to no longer
        write to rodata from assembly when ARM_KERNMEM_PERMS was enabled, but
        there were also other fixes.
      
        Kirkwood had a bunch of gpio fixes for some boards.  OMAP had RTC
        fixes on OMAP5, and Nomadik had changes to MMC parameters in DT.
      
        All in all, mostly the usual mix of various fixes"
      
      * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (46 commits)
        ARM: multi_v7_defconfig: enable DW_WATCHDOG
        ARM: nomadik: fix up SD/MMC DT settings
        ARM64: tegra: Add chosen node for tegra132 norrin
        ARM: realview: use "depends on" instead of "if" after prompt
        ARM: tango: use "depends on" instead of "if" after prompt
        ARM: tango: use const and __initconst for smp_operations
        ARM: realview: use const and __initconst for smp_operations
        bus: uniphier-system-bus: revive tristate prompt
        arm64: dts: Add missing DMA Abort interrupt to Juno
        bus: vexpress-config: Add missing of_node_put
        ARM: dts: am57xx: sbc-am57x: correct Eth PHY settings
        ARM: dts: am57xx: cl-som-am57x: fix CPSW EMAC pinmux
        ARM: dts: am57xx: sbc-am57x: fix UART3 pinmux
        ARM: dts: am57xx: cl-som-am57x: update SPI Flash frequency
        ARM: dts: am57xx: cl-som-am57x: set HOST mode for USB2
        ARM: dts: am57xx: sbc-am57x: fix SB-SOM EEPROM I2C address
        ARM: dts: LogicPD Torpedo: Revert Duplicative Entries
        ARM: dts: am437x: pixcir_tangoc: use correct flags for irq types
        ARM: dts: am4372: fix irq type for arm twd and global timer
        ARM: dts: at91: sama5d4 xplained: fix phy0 IRQ type
        ...
      c17dfb01
    • Linus Torvalds's avatar
      Merge branch 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration · 63fee123
      Linus Torvalds authored
      Pull mailbox fixes from Jassi Brar:
      
       - fix getting element from the pcc-channels array by simply indexing
         into it
      
       - prevent building mailbox-test driver for archs that don't have IOMEM
      
      * 'mailbox-devel' of git://git.linaro.org/landing-teams/working/fujitsu/integration:
        mailbox: Fix dependencies for !HAS_IOMEM archs
        mailbox: pcc: fix channel calculation in get_pcc_channel()
      63fee123
    • Linus Torvalds's avatar
      Merge tag 'usb-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb · 46df55ce
      Linus Torvalds authored
      Pull USB fixes from Greg KH:
       "Here are some USB fixes for 4.5-rc3.
      
        The usual, xhci fixes for reported issues, combined with some small
        gadget driver fixes, and a MAINTAINERS file update.  All have been in
        linux-next with no reported issues"
      
      * tag 'usb-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
        xhci: harden xhci_find_next_ext_cap against device removal
        xhci: Fix list corruption in urb dequeue at host removal
        usb: host: xhci-plat: fix NULL pointer in probe for device tree case
        usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling
        usb: xhci-mtk: fix bpkts value of LS/HS periodic eps not behind TT
        usb: xhci: apply XHCI_PME_STUCK_QUIRK to Intel Broxton-M platforms
        usb: xhci: set SSIC port unused only if xhci_suspend succeeds
        usb: xhci: add a quirk bit for ssic port unused
        usb: xhci: handle both SSIC ports in PME stuck quirk
        usb: dwc3: gadget: set the OTG flag in dwc3 gadget driver.
        Revert "xhci: don't finish a TD if we get a short-transfer event mid TD"
        MAINTAINERS: fix my email address
        usb: dwc2: Fix probe problem on bcm2835
        Revert "usb: dwc2: Move reset into dwc2_get_hwparams()"
        usb: musb: ux500: Fix NULL pointer dereference at system PM
        usb: phy: mxs: declare variable with initialized value
        usb: phy: msm: fix error handling in probe.
      46df55ce
    • Linus Torvalds's avatar
      Merge tag 'staging-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging · dacd53c8
      Linus Torvalds authored
      Pull staging and IIO driver fixes from Greg KH:
       "Here are some IIO and staging driver fixes for 4.5-rc3.
      
        All of them, except one, are for IIO drivers, and one is for a speakup
        driver fix caused by some earlier patches, to resolve a reported build
        failure"
      
      * tag 'staging-4.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
        Staging: speakup: Fix allyesconfig build on mn10300
        iio: dht11: Use boottime
        iio: ade7753: avoid uninitialized data
        iio: pressure: mpl115: fix temperature offset sign
        iio: imu: Fix dependencies for !HAS_IOMEM archs
        staging: iio: Fix dependencies for !HAS_IOMEM archs
        iio: adc: Fix dependencies for !HAS_IOMEM archs
        iio: inkern: fix a NULL dereference on error
        iio:adc:ti_am335x_adc Fix buffered mode by identifying as software buffer.
        iio: light: acpi-als: Report data as processed
        iio: dac: mcp4725: set iio name property in sysfs
        iio: add HAS_IOMEM dependency to VF610_ADC
        iio: add IIO_TRIGGER dependency to STK8BA50
        iio: proximity: lidar: correct return value
        iio-light: Use a signed return type for ltr501_match_samp_freq()
      dacd53c8
  6. 06 Feb, 2016 3 commits
    • Linus Torvalds's avatar
      Merge branch 'akpm' (patches from Andrew) · 5af9c2e1
      Linus Torvalds authored
      Merge fixes from Andrew Morton:
       "22 fixes"
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits)
        epoll: restrict EPOLLEXCLUSIVE to POLLIN and POLLOUT
        radix-tree: fix oops after radix_tree_iter_retry
        MAINTAINERS: trim the file triggers for ABI/API
        dax: dirty inode only if required
        thp: make deferred_split_scan() work again
        mm: replace vma_lock_anon_vma with anon_vma_lock_read/write
        ocfs2/dlm: clear refmap bit of recovery lock while doing local recovery cleanup
        um: asm/page.h: remove the pte_high member from struct pte_t
        mm, hugetlb: don't require CMA for runtime gigantic pages
        mm/hugetlb: fix gigantic page initialization/allocation
        mm: downgrade VM_BUG in isolate_lru_page() to warning
        mempolicy: do not try to queue pages from !vma_migratable()
        mm, vmstat: fix wrong WQ sleep when memory reclaim doesn't make any progress
        vmstat: make vmstat_update deferrable
        mm, vmstat: make quiet_vmstat lighter
        mm/Kconfig: correct description of DEFERRED_STRUCT_PAGE_INIT
        memblock: don't mark memblock_phys_mem_size() as __init
        dump_stack: avoid potential deadlocks
        mm: validate_mm browse_rb SMP race condition
        m32r: fix build failure due to SMP and MMU
        ...
      5af9c2e1
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · 5d6a6a75
      Linus Torvalds authored
      Pull Ceph fixes from Sage Weil:
       "We have a few wire protocol compatibility fixes, ports of a few recent
        CRUSH mapping changes, and a couple error path fixes"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
        libceph: MOSDOpReply v7 encoding
        libceph: advertise support for TUNABLES5
        crush: decode and initialize chooseleaf_stable
        crush: add chooseleaf_stable tunable
        crush: ensure take bucket value is valid
        crush: ensure bucket id is valid before indexing buckets array
        ceph: fix snap context leak in error path
        ceph: checking for IS_ERR instead of NULL
      5d6a6a75
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 9b108828
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "Fixes all over the place:
      
         - amdkfd: two static checker fixes
         - mst: a bunch of static checker and spec/hw interaction fixes
         - amdgpu: fix Iceland hw properly, and some fiji bugs, along with
           some write-combining fixes.
         - exynos: some regression fixes
         - adv7511: fix some EDID reading issues"
      
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (38 commits)
        drm/dp/mst: deallocate payload on port destruction
        drm/dp/mst: Reverse order of MST enable and clearing VC payload table.
        drm/dp/mst: move GUID storage from mgr, port to only mst branch
        drm/dp/mst: change MST detection scheme
        drm/dp/mst: Calculate MST PBN with 31.32 fixed point
        drm: Add drm_fixp_from_fraction and drm_fixp2int_ceil
        drm/mst: Add range check for max_payloads during init
        drm/mst: Don't ignore the MST PBN self-test result
        drm: fix missing reference counting decrease
        drm/amdgpu: disable uvd and vce clockgating on Fiji
        drm/amdgpu: remove exp hardware support from iceland
        drm/amdgpu: load MEC ucode manually on iceland
        drm/amdgpu: don't load MEC2 on topaz
        drm/amdgpu: drop topaz support from gmc8 module
        drm/amdgpu: pull topaz gmc bits into gmc_v7
        drm/amdgpu: The VI specific EXE bit should only apply to GMC v8.0 above
        drm/amdgpu: iceland use CI based MC IP
        drm/amdgpu: move gmc7 support out of CIK dependency
        drm/amdgpu/gfx7: enable cp inst/reg error interrupts
        drm/amdgpu/gfx8: enable cp inst/reg error interrupts
        ...
      9b108828