- 20 May, 2015 40 commits
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Doug Anderson authored
commit c5272a28 upstream. Way back, when the world was a simpler place and there was no war, no evil, and no kernel bugs, there was just a single pinctrl lock. That was how the world was when (57291ce2 pinctrl: core device tree mapping table parsing support) was written. In that case, there were instances where the pinctrl mutex was already held when pinctrl_register_map() was called, hence a "locked" parameter was passed to the function to indicate that the mutex was already locked (so we shouldn't lock it again). A few years ago in (42fed7ba pinctrl: move subsystem mutex to pinctrl_dev struct), we switched to a separate pinctrl_maps_mutex. ...but (oops) we forgot to re-think about the whole "locked" parameter for pinctrl_register_map(). Basically the "locked" parameter appears to still refer to whether the bigger pinctrl_dev mutex is locked, but we're using it to skip locks of our (now separate) pinctrl_maps_mutex. That's kind of a bad thing(TM). Probably nobody noticed because most of the calls to pinctrl_register_map happen at boot time and we've got synchronous device probing. ...and even cases where we're asynchronous don't end up actually hitting the race too often. ...but after banging my head against the wall for a bug that reproduced 1 out of 1000 reboots and lots of looking through kgdb, I finally noticed this. Anyway, we can now safely remove the "locked" parameter and go back to a war-free, evil-free, and kernel-bug-free world. Fixes: 42fed7ba ("pinctrl: move subsystem mutex to pinctrl_dev struct") Signed-off-by:
Doug Anderson <dianders@chromium.org> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
Luis Henriques <luis.henriques@canonical.com>
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Chuanxiao Dong authored
commit 4e93b9a6 upstream. During kernel boot, it will try to read some logical sectors of each block device node for the possible partition table. But since RPMB partition is special and can not be accessed by normal eMMC read / write CMDs, it will cause below error messages during kernel boot: ... mmc0: Got data interrupt 0x00000002 even though no data operation was in progress. mmcblk0rpmb: error -110 transferring data, sector 0, nr 32, cmd response 0x900, card status 0xb00 mmcblk0rpmb: retrying using single block read mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 mmcblk0rpmb: timed out sending r/w cmd command, card status 0x400900 end_request: I/O error, dev mmcblk0rpmb, sector 0 Buffer I/O error on device mmcblk0rpmb, logical block 0 end_request: I/O error, dev mmcblk0rpmb, sector 8 Buffer I/O error on device mmcblk0rpmb, logical block 1 end_request: I/O error, dev mmcblk0rpmb, sector 16 Buffer I/O error on device mmcblk0rpmb, logical block 2 end_request: I/O error, dev mmcblk0rpmb, sector 24 Buffer I/O error on device mmcblk0rpmb, logical block 3 ... This patch will discard the access request in eMMC queue if it is RPMB partition access request. By this way, it avoids trigger above error messages. Fixes: 090d25fe ("mmc: core: Expose access to RPMB partition") Signed-off-by:
Yunpeng Gao <yunpeng.gao@intel.com> Signed-off-by:
Chuanxiao Dong <chuanxiao.dong@intel.com> Tested-by:
Michael Shigorin <mike@altlinux.org> Signed-off-by:
Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by:
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Takeshi Kihara authored
commit bad4371d upstream. f9fd54f2 ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout") changed the timeout value from 1000 jiffies to 1s. In the case where HZ is 1000 the values are the same. However, for smaller HZ values the timeout is now smaller, 1s instead of 10s in the case of HZ=100. Since the timeout occurs in spite of a normal data transfer a timeout of 10s seems more appropriate. This restores the previous timeout in the case where HZ=100 and results in an increase over the previous timeout for larger values of HZ. Fixes: f9fd54f2 ("mmc: sh_mmcif: Use msecs_to_jiffies() for host->timeout") Signed-off-by:
Takeshi Kihara <takeshi.kihara.df@renesas.com> [horms: rewrote changelog to refer to HZ] Signed-off-by:
Simon Horman <horms+renesas@verge.net.au> Signed-off-by:
Yoshihiro Kaneko <ykaneko0929@gmail.com> Signed-off-by:
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Grygorii Strashko authored
commit 184af16b upstream. The PM_RESTORE_PREPARE is not handled now in mmc_pm_notify(), as result mmc_rescan() could be scheduled and executed at late hibernation restore stages when MMC device is suspended already - which, in turn, will lead to system crash on TI dra7-evm board: WARNING: CPU: 0 PID: 3188 at drivers/bus/omap_l3_noc.c:148 l3_interrupt_handler+0x258/0x374() 44000000.ocp:L3 Custom Error: MASTER MPU TARGET L4_PER1_P3 (Idle): Data Access in User mode during Functional access Hence, add missed PM_RESTORE_PREPARE PM event in mmc_pm_notify(). Fixes: 4c2ef25f (mmc: fix all hangs related to mmc/sd card...) Signed-off-by:
Grygorii Strashko <Grygorii.Strashko@linaro.org> Signed-off-by:
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Ben Hutchings authored
commit 8014bcc8 upstream. The variable for the 'permissive' module parameter used to be static but was recently changed to be extern. This puts it in the kernel global namespace if the driver is built-in, so its name should begin with a prefix identifying the driver. Signed-off-by:
Ben Hutchings <ben@decadent.org.uk> Fixes: af6fc858 ("xen-pciback: limit guest control of command register") Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
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Ulf Hansson authored
commit 11133db7 upstream. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by:
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Ulf Hansson authored
commit f9a8c391 upstream. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
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Ulf Hansson authored
commit 53d26698 upstream. The GPIO regulator for the SD-card isn't a ux500 SOC configuration, but instead it's specific to the board. Move the definition of it, into the board DTSs. Fixes: c94a4ab7 ("ARM: ux500: Disable the MMCI gpio-regulator by default") Signed-off-by:
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Eric W. Biederman authored
commit 7e96c1b0 upstream. This fixes a dumb bug in fs_fully_visible that allows proc or sys to be mounted if there is a bind mount of part of /proc/ or /sys/ visible. Reported-by:
Eric Windisch <ewindisch@docker.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by:
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Al Viro authored
commit f15133df upstream. path_openat() jumps to the wrong place after do_tmpfile() - it has already done path_cleanup() (as part of path_lookupat() called by do_tmpfile()), so doing that again can lead to double fput(). Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> [ luis: backported to 3.16: - adjusted context as 3.16 doesn't have path_cleanup() helper, introduced by 893b7775 ("fs/namei.c: new helper (path_cleanup())") ] Signed-off-by:
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Christian König authored
commit d52cdfa4 upstream. MPEG 2/4 are only supported since UVD3. Signed-off-by:
Christian König <christian.koenig@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Signed-off-by:
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Christian König authored
commit a1b403da upstream. Invalid messages can crash the hw otherwise. Signed-off-by:
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Christian König authored
commit 29c63fe2 upstream. Invalid handles can crash the hw. Signed-off-by:
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Jani Nikula authored
commit 9fcb1704 upstream. The eDP port A register on PCH split platforms has a slightly different register layout from the other ports, with bit 6 being either alternate scrambler reset or reserved, depending on the generation. Our misinterpretation of the bit as audio has lead to warning. Fix this by not enabling audio on port A, since none of our platforms support audio on port A anyway. v2: DDI doesn't have audio on port A either (Sivakumar Thulasimani) Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89958Reported-and-tested-by:
Chris Bainbridge <chris.bainbridge@gmail.com> Reviewed-by:
Sivakumar Thulasimani <sivakumar.thulasimani@intel.com> Signed-off-by:
Jani Nikula <jani.nikula@intel.com> [ luis: backported to 3.16: adjusted context ] Signed-off-by:
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Junxiao Bi authored
commit b1432a2a upstream. There is a race window in dlm_get_lock_resource(), which may return a lock resource which has been purged. This will cause the process to hang forever in dlmlock() as the ast msg can't be handled due to its lock resource not existing. dlm_get_lock_resource { ... spin_lock(&dlm->spinlock); tmpres = __dlm_lookup_lockres_full(dlm, lockid, namelen, hash); if (tmpres) { spin_unlock(&dlm->spinlock); >>>>>>>> race window, dlm_run_purge_list() may run and purge the lock resource spin_lock(&tmpres->spinlock); ... spin_unlock(&tmpres->spinlock); } } Signed-off-by:
Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Ryusuke Konishi authored
commit d8fd150f upstream. The range check for b-tree level parameter in nilfs_btree_root_broken() is wrong; it accepts the case of "level == NILFS_BTREE_LEVEL_MAX" even though the level is limited to values in the range of 0 to (NILFS_BTREE_LEVEL_MAX - 1). Since the level parameter is read from storage device and used to index nilfs_btree_path array whose element count is NILFS_BTREE_LEVEL_MAX, it can cause memory overrun during btree operations if the boundary value is set to the level parameter on device. This fixes the broken sanity check and adds a comment to clarify that the upper bound NILFS_BTREE_LEVEL_MAX is exclusive. Signed-off-by:
Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by:
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Naoya Horiguchi authored
commit 602498f9 upstream. If multiple soft offline events hit one free page/hugepage concurrently, soft_offline_page() can handle the free page/hugepage multiple times, which makes num_poisoned_pages counter increased more than once. This patch fixes this wrong counting by checking TestSetPageHWPoison for normal papes and by checking the return value of dequeue_hwpoisoned_huge_page() for hugepages. Signed-off-by:
Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by:
Dean Nelson <dnelson@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Signed-off-by:
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Naoya Horiguchi authored
commit 09789e5d upstream. Currently memory_failure() calls shake_page() to sweep pages out from pcplists only when the victim page is 4kB LRU page or thp head page. But we should do this for a thp tail page too. Consider that a memory error hits a thp tail page whose head page is on a pcplist when memory_failure() runs. Then, the current kernel skips shake_pages() part, so hwpoison_user_mappings() returns without calling split_huge_page() nor try_to_unmap() because PageLRU of the thp head is still cleared due to the skip of shake_page(). As a result, me_huge_page() runs for the thp, which is broken behavior. One effect is a leak of the thp. And another is to fail to isolate the memory error, so later access to the error address causes another MCE, which kills the processes which used the thp. This patch fixes this problem by calling shake_page() for thp tail case. Fixes: 385de357 ("thp: allow a hwpoisoned head page to be put back to LRU") Signed-off-by:
Andi Kleen <ak@linux.intel.com> Acked-by:
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Boris Ostrovsky authored
commit 16e6bd59 upstream. .. because bind_evtchn_to_cpu(evtchn, cpu) will map evtchn to 'info' and pass 'info' down to xen_evtchn_port_bind_to_cpu(). Signed-off-by:
Boris Ostrovsky <boris.ostrovsky@oracle.com> Tested-by:
Annie Li <annie.li@oracle.com> Signed-off-by:
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Boris Ostrovsky authored
commit b9d934f2 upstream. After a resume the hypervisor/tools may change console event channel number. We should re-query it. Signed-off-by:
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Boris Ostrovsky authored
commit 16f1cf3b upstream. After a resume the hypervisor/tools may change xenbus event channel number. We should re-query it. Signed-off-by:
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Boris Ostrovsky authored
commit 5cec9883 upstream. When a guest is resumed, the hypervisor may change event channel assignments. If this happens and the guest uses 2-level events it is possible for the interrupt to be claimed by wrong VCPU since cpu_evtchn_mask bits may be stale. This can happen even though evtchn_2l_bind_to_cpu() attempts to clear old bits: irq_info that is passed in is not necessarily the original one (from pre-migration times) but instead is freshly allocated during resume and so any information about which CPU the channel was bound to is lost. Thus we should clear the mask during resume. We also need to make sure that bits for xenstore and console channels are set when these two subsystems are resumed. While rebind_evtchn_irq() (which is invoked for both of them on a resume) calls irq_set_affinity(), the latter will in fact postpone setting affinity until handling the interrupt. But because cpu_evtchn_mask will have bits for these two cleared we won't be able to take the interrupt. With that in mind, we need to bind those two channels explicitly in rebind_evtchn_irq(). We will keep irq_set_affinity() so that we have a pass through generic irq affinity code later, in case something needs to be updated there as well. (Also replace cpumask_of(0) with cpumask_of(info->cpu) in rebind_evtchn_irq(): it should be set to zero in preceding xen_irq_info_evtchn_setup().) Signed-off-by:
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Dan Carpenter authored
commit d67e1996 upstream. I spotted two (difficult to hit) bugs while reviewing this. 1) There is a double free bug because we unregister "map_kset" in add_sysfs_runtime_map_entry() and also efi_runtime_map_init(). 2) If we fail to allocate "entry" then we should return ERR_PTR(-ENOMEM) instead of NULL. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Cc: Dave Young <dyoung@redhat.com> Cc: Guangyu Sun <guangyu.sun@oracle.com> Signed-off-by:
Matt Fleming <matt.fleming@intel.com> Signed-off-by:
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Lukas Wunner authored
commit 3916e3fd upstream. Single channel LVDS maxes out at 112 MHz. The 15" pre-retina models shipped with 1440x900 (106 MHz) by default or 1680x1050 (119 MHz) as a BTO option, both versions used dual channel LVDS even though the smaller one would have fit into a single channel. Notes: Bug report showing that the MacBookPro8,2 with 1440x900 uses dual channel LVDS (this lead to it being hardcoded in intel_lvds.c by Daniel Vetter with commit 618563e3): https://bugzilla.kernel.org/show_bug.cgi?id=42842 If i915.lvds_channel_mode=2 is missing even though the machine needs it, every other vertical line is white and consequently, only the left half of the screen is visible (verified by myself on a MacBookPro9,1). Forum posting concerning a MacBookPro6,2 with 1440x900, author is using i915.lvds_channel_mode=2 on the kernel command line, proving that the machine uses dual channels: https://bbs.archlinux.org/viewtopic.php?id=185770 Chi Mei N154C6-L04 with 1440x900 is a replacement panel for all MacBook Pro "A1286" models, and that model number encompasses the MacBookPro6,2 / 8,2 / 9,1. Page 17 of the panel's datasheet shows it's driven with dual channel LVDS: http://www.ebay.com/itm/-/400690878560 http://www.everymac.com/ultimate-mac-lookup/?search_keywords=A1286 http://www.taopanel.com/chimei/datasheet/N154C6-L04.pdf Those three 15" models, MacBookPro6,2 / 8,2 / 9,1, are the only ones with i915 graphics and dual channel LVDS, so that list should be complete. And the 8,2 is already in intel_lvds.c. Possible motivation to use dual channel LVDS even on the 1440x900 models: Reduce the number of different parts, i.e. use identical logic boards and display cabling on both versions and the only differing component is the panel. Signed-off-by:
Lukas Wunner <lukas@wunner.de> Acked-by:
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Jason Gunthorpe authored
commit 28521440 upstream. When accepting a new IPv4 connect to an IPv6 socket, the CMA tries to canonize the address family to IPv4, but does not properly process the listening sockaddr to get the listening port, and does not properly set the address family of the canonized sockaddr. Fixes: e51060f0 ("IB: IP address based RDMA connection manager") Reported-By:
Yotam Kenneth <yotamke@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgunthorpe@obsidianresearch.com> Tested-by:
Haggai Eran <haggaie@mellanox.com> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
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Christian König authored
commit 013ead48 upstream. Hardware doesn't seem to work correctly, just block userspace in this case. v2: add missing defines Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=85320Signed-off-by:
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Pavel Machek authored
commit 1819e303 upstream. N900 audio recording needs that codec provides bias voltage for integrated digital microphone and headset microphone depending which one is used. Digital microphone uses 2 V bias and it comes from the codec A part. Codec B part drives the headset microphone bias and that is set to 2.5 V. Signed-off-by:
Pavel Machek <pavel@ucw.cz> [Jarkko: Headset mic bias changed to 2 (2.5 V) as it was before commit e2e8bfdf ("ASoC: tlv320aic3x: Convert mic bias to a supply widget")] Signed-off-by:
Jarkko Nikula <jarkko.nikula@bitmer.com> Signed-off-by:
Tony Lindgren <tony@atomide.com> Signed-off-by:
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Tony Lindgren authored
commit 102bcb6e upstream. If we use a combination of VMODE and I2C4 for retention modes, eventually the off idle power consumption will creep up by about 23mW, even during off mode with I2C4 always staying enabled. Turns out this is because of erratum i531 "Extra Power Consumed When Repeated Start Operation Mode Is Enabled on I2C Interface Dedicated for Smart Reflex (I2C4)" as pointed out by Nishanth Menon <nm@ti.com>. Let's fix the issue by adding i2c_cfg_clear_mask for the bits to clear when initializing the I2C4 adapter so we can clear SREN bit that drives the I2C4 lines low otherwise when there is no traffic. Fixes: 3b8c4ebb ("ARM: OMAP3: Fix idle mode signaling for sys_clkreq and sys_off_mode") Cc: Kevin Hilman <khilman@kernel.org> Cc: Tero Kristo <t-kristo@ti.com> Reviewed-by:
Nishanth Menon <nm@ti.com> Signed-off-by:
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Witold Szczeponik authored
commit 622532bb upstream. Commit eec15edb (ACPI / PNP: use device ID list for PNPACPI device enumeration) changed the way how ACPI devices are enumerated and when they are added to the PNP bus. However, it broke the sound card support on (at least) a vintage IBM ThinkPad 600E: with said commit applied, two of the necessary "CSC01xx" devices are not added to the PNP bus and hence can not be found during the initialization of the "snd-cs4236" module. As a consequence, loading "snd-cs4236" causes null pointer exceptions. The attached patch fixes the problem end re-enables sound on the IBM ThinkPad 600E. Fixes: eec15edb (ACPI / PNP: use device ID list for PNPACPI device enumeration) Signed-off-by:
Witold Szczeponik <Witold.Szczeponik@gmx.net> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Johan Hovold authored
commit 483d8211 upstream. Unregister GPIOs requested through sysfs at chip remove to avoid leaking the associated memory and sysfs entries. The stale sysfs entries prevented the gpio numbers from being exported when the gpio range was later reused (e.g. at device reconnect). This also fixes the related module-reference leak. Note that kernfs makes sure that any on-going sysfs operations finish before the class devices are unregistered and that further accesses fail. The chip exported flag is used to prevent gpiod exports during removal. This also makes it harder to trigger, but does not fix, the related race between gpiochip_remove and export_store, which is really a race with gpiod_request that needs to be addressed separately. Also note that this would prevent the crashes (e.g. NULL-dereferences) at reconnect that affects pre-3.18 kernels, as well as use-after-free on operations on open attribute files on pre-3.14 kernels (prior to kernfs). Fixes: d8f388d8 ("gpio: sysfs interface") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit 01cca93a upstream. Unregister gpiochip device (used to export information through sysfs) before removing it internally. This way removal will reverse addition. Signed-off-by:
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Marek Vasut authored
commit 4ada77e3 upstream. Fix a typo in the TX DMA interrupt name for AUART4. This patch makes AUART4 operational again. Signed-off-by:
Marek Vasut <marex@denx.de> Fixes: f30fb03d ("ARM: dts: add generic DMA device tree binding for mxs-dma") Acked-by:
Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by:
Shawn Guo <shawn.guo@linaro.org> Signed-off-by:
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Markus Pargmann authored
commit f90d3f0d upstream. The property '#pwm-cells' is currently missing. It is not possible to use pwm4 without this property. Signed-off-by:
Markus Pargmann <mpa@pengutronix.de> Fixes: 5658a68f ("ARM i.MX25: Add devicetree") Reviewed-by:
Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by:
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Philipp Zabel authored
commit 7f8d49dc upstream. The fixed-regulator bindings require a separate property enable-active-high, the standard gpio phandle property polarity setting is ignored. Signed-off-by:
Philipp Zabel <p.zabel@pengutronix.de> Fixes: 4fe69a93 ("ARM: dts: Add Phytec pfla02 with i.MX6 DualLite/Solo") Signed-off-by:
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Stefan Wahren authored
commit 0fdebe1a upstream. The dr_mode of usb0 on imx233-olinuxino is left to default "otg". Since the green LED (GPIO2_1) on imx233-olinuxino is connected to the same pin as USB_OTG_ID it's possible to disable USB host by LED toggling: echo 0 > /sys/class/leds/green/brightness [ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1 [ 1068.890000] usb usb1: USB disconnect, device number 1 [ 1068.920000] usb 1-1: USB disconnect, device number 2 [ 1068.920000] usb 1-1.1: USB disconnect, device number 3 [ 1069.070000] usb 1-1.2: USB disconnect, device number 4 [ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered [ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11 This patch fixes the issue by setting dr_mode to "host" in the dts file. Reported-by:
Harald Geyer <harald@ccbib.org> Signed-off-by:
Peter Chen <peter.chen@freescale.com> Fixes: b4931294 ("ARM: dts: imx23-olinuxino: Add USB host support") Signed-off-by:
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Fabio Estevam authored
commit cfe8c597 upstream. On imx23-olinuxino the LED turns on when level logic high is aplied to GPIO2_1. Fix the gpios property accordingly. Fixes: b34aa185 ("ARM: dts: imx23-olinuxino: Remove unneeded "default-on"") Reported-by:
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Gregory CLEMENT authored
commit 750e30d4 upstream. There is no crystal connected to the internal RTC on the Open Block AX3. So let's disable it in order to prevent the kernel probing the driver uselessly. Eventually this patches removes the following warning message from the boot log: "rtc-mv d0010300.rtc: internal RTC not ticking" Acked-by:
Andrew Lunn <andrew@lunn.ch> Signed-off-by:
Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by:
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Tejun Heo authored
commit 464d1387 upstream. mm/page-writeback.c has several places where 1 is added to the divisor to prevent division by zero exceptions; however, if the original divisor is equivalent to -1, adding 1 leads to division by zero. There are three places where +1 is used for this purpose - one in pos_ratio_polynom() and two in bdi_position_ratio(). The second one in bdi_position_ratio() actually triggered div-by-zero oops on a machine running a 3.10 kernel. The divisor is x_intercept - bdi_setpoint + 1 == span + 1 span is confirmed to be (u32)-1. It isn't clear how it ended up that but it could be from write bandwidth calculation underflow fixed by c72efb65 ("writeback: fix possible underflow in write bandwidth calculation"). At any rate, +1 isn't a proper protection against div-by-zero. This patch converts all +1 protections to |1. Note that bdi_update_dirty_ratelimit() was already using |1 before this patch. Signed-off-by:
Tejun Heo <tj@kernel.org> Reviewed-by:
Jan Kara <jack@suse.cz> Signed-off-by:
Jens Axboe <axboe@fb.com> Signed-off-by:
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Ming Lei authored
commit 2a34c087 upstream. hctx->tags has to be set as NULL in case that it is to be unmapped no matter if set->tags[hctx->queue_num] is NULL or not in blk_mq_map_swqueue() because shared tags can be freed already from another request queue. The same situation has to be considered during handling CPU online too. Unmapped hw queue can be remapped after CPU topo is changed, so we need to allocate tags for the hw queue in blk_mq_map_swqueue(). Then tags allocation for hw queue can be removed in hctx cpu online notifier, and it is reasonable to do that after mapping is updated. Reported-by:
Dongsu Park <dongsu.park@profitbricks.com> Tested-by:
Ming Lei <ming.lei@canonical.com> Signed-off-by:
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Roy Franz authored
commit 98b228f5 upstream. Until now, the EFI stub was only setting the 32 bit cmd_line_ptr in the setup_header structure, so on 64 bit platforms this could be truncated. This patch adds setting the upper bits of the buffer address in ext_cmd_line_ptr. This case was likely never hit, as the allocation for this buffer is done at the lowest available address. Only x86_64 kernels have this problem, as the 1-1 mapping mandated by EFI ensures that all memory is 32 bit addressable on 32 bit platforms. The EFI stub does not support mixed mode, so the 32 bit kernel on 64 bit firmware case does not need to be handled. Signed-off-by:
Roy Franz <roy.franz@linaro.org> Signed-off-by:
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