Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Dave Airlie 274d835248 drm/dp/mst: drop cancel work sync in the mstb destroy path (v2) ... Since 9eb1e57f56 drm/dp/mst: make sure mst_primary mstb is valid in work function we validate the mstb structs in the work function, and doing that takes a reference. So we should never get here with the work function running using the mstb device, only if the work function hasn't run yet or is running for another mstb. So we don't need to sync the work here, this was causing lockdep spew as below. [ +0.000160] ============================================= [ +0.000001] [ INFO: possible recursive locking detected ] [ +0.000002] 3.10.0-320.el7.rhel72.stable.backport.3.x86_64.debug #1 Tainted: G W ------------ [ +0.000001] --------------------------------------------- [ +0.000001] kworker/4:2/1262 is trying to acquire lock: [ +0.000001] ((&mgr->work)){+.+.+.}, at: [<ffffffff810b29a5>] flush_work+0x5/0x2e0 [ +0.000007] but task is already holding lock: [ +0.000001] ((&mgr->work)){+.+.+.}, at: [<ffffffff810b57e4>] process_one_work+0x1b4/0x710 [ +0.000004] other info that might help us debug this: [ +0.000001] Possible unsafe locking scenario: [ +0.000002] CPU0 [ +0.000000] ---- [ +0.000001] lock((&mgr->work)); [ +0.000002] lock((&mgr->work)); [ +0.000001] *** DEADLOCK *** [ +0.000001] May be due to missing lock nesting notation [ +0.000002] 2 locks held by kworker/4:2/1262: [ +0.000001] #0: (events_long){.+.+.+}, at: [<ffffffff810b57e4>] process_one_work+0x1b4/0x710 [ +0.000004] #1: ((&mgr->work)){+.+.+.}, at: [<ffffffff810b57e4>] process_one_work+0x1b4/0x710 [ +0.000003] stack backtrace: [ +0.000003] CPU: 4 PID: 1262 Comm: kworker/4:2 Tainted: G W ------------ 3.10.0-320.el7.rhel72.stable.backport.3.x86_64.debug #1 [ +0.000001] Hardware name: LENOVO 20EGS0R600/20EGS0R600, BIOS GNET71WW (2.19 ) 02/05/2015 [ +0.000008] Workqueue: events_long drm_dp_mst_link_probe_work [drm_kms_helper] [ +0.000001] ffffffff82c26c90 00000000a527b914 ffff88046399bae8 ffffffff816fe04d [ +0.000004] ffff88046399bb58 ffffffff8110f47f ffff880461438000 0001009b840fc003 [ +0.000002] ffff880461438a98 0000000000000000 0000000804dc26e1 ffffffff824a2c00 [ +0.000003] Call Trace: [ +0.000004] [<ffffffff816fe04d>] dump_stack+0x19/0x1b [ +0.000004] [<ffffffff8110f47f>] __lock_acquire+0x115f/0x1250 [ +0.000002] [<ffffffff8110fd49>] lock_acquire+0x99/0x1e0 [ +0.000002] [<ffffffff810b29a5>] ? flush_work+0x5/0x2e0 [ +0.000002] [<ffffffff810b29ee>] flush_work+0x4e/0x2e0 [ +0.000002] [<ffffffff810b29a5>] ? flush_work+0x5/0x2e0 [ +0.000004] [<ffffffff81025905>] ? native_sched_clock+0x35/0x80 [ +0.000002] [<ffffffff81025959>] ? sched_clock+0x9/0x10 [ +0.000002] [<ffffffff810da1f5>] ? local_clock+0x25/0x30 [ +0.000002] [<ffffffff8110dca9>] ? mark_held_locks+0xb9/0x140 [ +0.000003] [<ffffffff810b4ed5>] ? __cancel_work_timer+0x95/0x160 [ +0.000002] [<ffffffff810b4ee8>] __cancel_work_timer+0xa8/0x160 [ +0.000002] [<ffffffff810b4fb0>] cancel_work_sync+0x10/0x20 [ +0.000007] [<ffffffffa0160d17>] drm_dp_destroy_mst_branch_device+0x27/0x120 [drm_kms_helper] [ +0.000006] [<ffffffffa0163968>] drm_dp_mst_link_probe_work+0x78/0xa0 [drm_kms_helper] [ +0.000002] [<ffffffff810b5850>] process_one_work+0x220/0x710 [ +0.000002] [<ffffffff810b57e4>] ? process_one_work+0x1b4/0x710 [ +0.000005] [<ffffffff810b5e5b>] worker_thread+0x11b/0x3a0 [ +0.000003] [<ffffffff810b5d40>] ? process_one_work+0x710/0x710 [ +0.000002] [<ffffffff810beced>] kthread+0xed/0x100 [ +0.000003] [<ffffffff810bec00>] ? insert_kthread_work+0x80/0x80 [ +0.000003] [<ffffffff817121d8>] ret_from_fork+0x58/0x90 v2: add flush_work. Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>		2015-10-02 15:34:42 +10:00
..
accessibility
acpi	ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()	2015-09-15 03:05:45 +02:00
amba
android	mm: mark most vm_operations_struct const	2015-09-10 13:29:01 -07:00
ata	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2015-09-03 16:55:55 -07:00
atm	solos-pci: Increase headroom on received packets	2015-09-17 21:29:07 -07:00
auxdisplay
base	driver core fix for 4.3-rc3	2015-09-26 20:54:53 -04:00
bcma
block	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2015-09-19 18:57:09 -07:00
bluetooth	Bluetooth: hci_bcm: Fix crash on suspend	2015-08-28 21:09:14 +02:00
bus	regmap: Changes for v4.3	2015-09-08 16:48:55 -07:00
cdrom
char	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2015-09-26 21:05:23 -04:00
clk	A few driver fixes for tegra, rockchip, and st SoCs and a two-liner	2015-09-19 20:17:40 -07:00
clocksource	- New Device Support	2015-09-04 11:35:03 -07:00
connector
cpufreq	cpufreq: acpi-cpufreq: Use cpufreq_cpu_get_raw() in ->get()	2015-09-16 02:17:49 +02:00
cpuidle	Additional power management and ACPI material for v4.3-rc1	2015-09-11 19:11:06 -07:00
crypto	Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2015-09-26 21:05:23 -04:00
dca
devfreq	PM / devfreq: Fix incorrect type issue.	2015-09-11 14:23:30 +09:00
dio
dma	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
dma-buf
edac	edac updates for v4.3-rc1	2015-09-11 16:21:12 -07:00
eisa
extcon	extcon: Fix attached value returned by is_extcon_changed	2015-09-21 15:07:19 +09:00
firewire
firmware	ARM: SoC fixes for v4.3-rc	2015-09-27 06:45:18 -04:00
fmc
gpio	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-18 08:11:42 -07:00
gpu	drm/dp/mst: drop cancel work sync in the mstb destroy path (v2)	2015-10-02 15:34:42 +10:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-09-04 12:02:11 -07:00
hsi	mm: mark most vm_operations_struct const	2015-09-10 13:29:01 -07:00
hv	Drivers: hv: vmbus: fix init_vp_index() for reloading hv_netvsc	2015-09-20 22:44:51 -07:00
hwmon	hwmon: (nct6775) Add support for NCT6793D	2015-09-12 19:43:02 -07:00
hwspinlock
hwtracing/coresight
i2c	Merge branch 'i2c/for-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2015-09-08 16:16:26 -07:00
ide
idle
iio	This is the bulk of GPIO changes for the v4.3 kernel cycle:	2015-09-04 10:07:45 -07:00
infiniband	Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-09-26 21:02:42 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-09-11 19:17:28 -07:00
iommu	fs/seq_file: convert int seq_vprint/seq_printf/etc... returns to void	2015-09-11 15:21:34 -07:00
ipack
irqchip	irqchip/atmel-aic5: Use per chip mask caches in mask/unmask()	2015-09-22 15:55:51 +02:00
isdn	libnvdimm for 4.3:	2015-09-08 14:35:59 -07:00
leds	leds:lp55xx: Correct Kconfig dependency for f/w user helper	2015-09-17 10:02:20 +02:00
lguest
macintosh	powerpc updates for 4.3	2015-09-03 16:41:38 -07:00
mailbox	Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration	2015-09-05 18:11:04 -07:00
mcb
md	dm crypt: constrain crypt device's max_segment_size to PAGE_SIZE	2015-09-14 12:04:24 -04:00
media	media updates for v4.3-rc1	2015-09-11 16:42:39 -07:00
memory	IOMMU Updates for Linux v4.3	2015-09-08 17:22:35 -07:00
memstick
message
mfd	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
misc	Char/Misc driver fixes for 4.3-rc3	2015-09-26 20:53:15 -04:00
mmc	MMC core:	2015-09-08 16:33:16 -07:00
mtd	MTD updates #2 for 4.3-rc1:	2015-09-09 11:17:33 -07:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-09-26 06:01:33 -04:00
nfc	This is the bulk of GPIO changes for the v4.3 kernel cycle:	2015-09-04 10:07:45 -07:00
ntb	NTB: Fix range check on memory window index	2015-09-07 15:27:12 -04:00
nubus
nvdimm	pmem: add proper fencing to pmem_rw_page()	2015-09-17 11:49:28 -04:00
nvmem
of	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-09-26 06:01:33 -04:00
oprofile
parisc	PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code"	2015-09-15 13:18:04 -05:00
parport
pci	PCI updates for v4.3:	2015-09-25 11:16:53 -07:00
pcmcia	pcmcia: soc_common: remove skt_dev_info's clk pointer	2015-09-03 16:01:03 +01:00
perf
phy	This is the bulk of GPIO changes for the v4.3 kernel cycle:	2015-09-04 10:07:45 -07:00
pinctrl	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-09-18 08:11:42 -07:00
platform	platform-drivers-x86 for 4.3-2	2015-09-17 21:41:02 -07:00
pnp
power	power supply and reset fixes for the v4.3 series	2015-09-17 12:25:42 -07:00
powercap	powercap / RAPL: disable the 2nd power limit properly	2015-08-29 01:46:40 +02:00
pps
ps3
ptp
pwm	pwm: Changes for v4.3-rc1	2015-09-09 10:55:32 -07:00
rapidio
ras
regulator	Merge commit 'b8c93646fd5c' into omap-for-v4.3/fixes	2015-09-24 16:23:20 -07:00
remoteproc
reset	reset: ath79: Fix missing spin_lock_init	2015-09-01 14:48:40 +02:00
rpmsg
rtc	rtc: abx80x: fix RTC write bit	2015-09-05 19:37:31 +02:00
s390	virtio: fixes on top of 4.3-rc1	2015-09-18 09:28:20 -07:00
sbus
scsi	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending	2015-09-11 19:00:42 -07:00
sfi
sh	SH Drivers Updates for v4.3	2015-09-21 12:02:27 -07:00
sn
soc	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
spi	Merge remote-tracking branches 'spi/fix/spidev' and 'spi/fix/xtfpga' into spi-linus	2015-09-22 09:48:41 -07:00
spmi	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
ssb
staging	Staging driver fixes for 4.3-rc3	2015-09-26 20:56:50 -04:00
target	iscsi-target: Avoid OFMarker + IFMarker negotiation	2015-09-24 23:24:46 -07:00
tc
thermal	thermal: power_allocator: exit early if there are no cooling devices	2015-09-20 15:37:16 +08:00
thunderbolt	thunderbolt: Allow loading of module on recent Apple MacBooks with thunderbolt 2 controller	2015-09-20 15:20:11 -07:00
tty	tty: serial: Add missing module license for 8250_base.ko	2015-09-22 09:09:15 -07:00
uio
usb	USB: whiteheat: fix potential null-deref at probe	2015-09-23 12:15:19 -07:00
uwb
vfio
vhost	virtio: fixes on top of 4.3-rc1	2015-09-18 09:28:20 -07:00
video	Merge branch 'akpm' (patches from Andrew)	2015-09-10 18:19:42 -07:00
virt
virtio	virtio_balloon: do not change memory amount visible via /proc/meminfo	2015-09-08 13:32:11 +03:00
vlynq
vme
w1	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-09-01 18:46:42 -07:00
watchdog	Merge git://www.linux-watchdog.org/linux-watchdog	2015-09-11 15:12:59 -07:00
xen	Merge branch 'akpm' (patches from Andrew)	2015-09-10 18:19:42 -07:00
zorro
Kconfig	Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm	2015-09-03 16:27:01 -07:00
Makefile	This is the bulk of pin control changes for the v4.3 development	2015-09-04 10:22:09 -07:00