Leo Yan f4bd619049 tty: serial: msm_serial: Fix lockup for sysrq and oops ... commit 0e4f7f920a upstream. As the commit 677fe555cb ("serial: imx: Fix recursive locking bug") has mentioned the uart driver might cause recursive locking between normal printing and the kernel debugging facilities (e.g. sysrq and oops). In the commit it gave out suggestion for fixing recursive locking issue: "The solution is to avoid locking in the sysrq case and trylock in the oops_in_progress case." This patch follows the suggestion (also used the exactly same code with other serial drivers, e.g. amba-pl011.c) to fix the recursive locking issue, this can avoid stuck caused by deadlock and print out log for sysrq and oops. Fixes: 04896a77a9 ("msm_serial: serial driver for MSM7K onboard serial peripheral.") Signed-off-by: Leo Yan <leo.yan@linaro.org> Reviewed-by: Jeffrey Hugo <jeffrey.l.hugo@gmail.com> Link: https://lore.kernel.org/r/20191127141544.4277-2-leo.yan@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-01-09 10:20:05 +01:00
..
accessibility	…
acpi	ACPI: sysfs: Change ACPI_MASKABLE_GPE_MAX to 0x100	2020-01-09 10:20:02 +01:00
amba	ARM updates for 5.4-rc:	2019-10-23 06:26:33 -04:00
android	binder: fix incorrect calculation for num_valid	2019-12-17 19:55:33 +01:00
ata	libata: Fix retrieving of active qcs	2020-01-09 10:19:59 +01:00
atm	atm: he: clean up an indentation issue	2019-09-25 13:54:45 +02:00
auxdisplay	It's a somewhat calmer cycle for docs this time, as the churn of the mass	2019-09-17 16:22:26 -07:00
base	firmware_loader: Fix labels with comma for builtin firmware	2019-12-31 16:45:39 +01:00
bcma	bcma: make arrays pwr_info_offset and sprom_sizes static const, shrinks object size	2019-09-13 16:44:49 +03:00
block	xen-blkback: prevent premature module unload	2020-01-09 10:19:51 +01:00
bluetooth	Bluetooth: btusb: fix PM leak in error case of setup	2020-01-09 10:20:04 +01:00
bus	bus: ti-sysc: Fix watchdog quirk handling	2019-10-18 08:45:32 -07:00
cdrom	cdrom: respect device capabilities during opening action	2020-01-04 19:18:25 +01:00
char	tpm: fix invalid locking in NONBLOCKING mode	2019-12-31 16:45:52 +01:00
clk	clk: pxa: fix one of the pxa RTC clocks	2020-01-04 19:18:11 +01:00
clocksource	clocksource: riscv: add notrace to riscv_sched_clock	2020-01-09 10:19:59 +01:00
connector	…
counter	…
cpufreq	cpufreq: Register drivers only after CPU devices have been registered	2019-12-31 16:45:26 +01:00
cpuidle	cpuidle: use first valid target residency as poll time	2019-12-17 19:56:23 +01:00
crypto	crypto: vmx - Avoid weird build failures	2019-12-31 16:45:45 +01:00
dax	…
dca	…
devfreq	PM / devfreq: Check NULL governor in available_governors_show	2020-01-09 10:20:01 +01:00
dio	…
dma	dmaengine: virt-dma: Fix access after free in vchan_complete()	2020-01-09 10:20:00 +01:00
dma-buf	dma-buf: Fix memory leak in sync_file_merge()	2019-12-21 11:04:48 +01:00
edac	EDAC/ghes: Fix grain calculation	2019-12-31 16:45:16 +01:00
eisa	…
extcon	extcon: sm5502: Reset registers during initialization	2019-12-31 16:44:04 +01:00
firewire	…
firmware	firmware: arm_scmi: Avoid double free in error flow	2020-01-09 10:20:03 +01:00
fpga	Char/Misc driver patches for 5.4-rc1	2019-09-18 11:14:31 -07:00
fsi	fsi: core: Fix small accesses and unaligned offsets via sysfs	2019-12-31 16:45:09 +01:00
gnss	…
gpio	gpiolib: fix up emulated open drain outputs	2020-01-09 10:19:59 +01:00
gpu	drm/msm: include linux/sched/task.h	2020-01-09 10:20:01 +01:00
greybus	staging: greybus: move es2 to drivers/greybus/	2019-08-27 19:03:08 +02:00
hid	HID: i2c-hid: Reset ALPS touchpads on resume	2020-01-09 10:20:02 +01:00
hsi	HSI changes for the 5.4 series	2019-09-22 12:02:21 -07:00
hv	Drivers: hv: vmbus: Fix crash handler reset of Hyper-V synic	2020-01-04 19:18:21 +01:00
hwmon	hwmon: (ina3221) Fix read timeout issue	2019-10-28 18:46:55 -07:00
hwspinlock	…
hwtracing	intel_th: msu: Fix window switching without windows	2019-12-31 16:46:09 +01:00
i2c	i2c: stm32f7: fix & reorder remove & probe error handling	2020-01-04 19:17:27 +01:00
i3c	i3c: master: Use dev_to_i3cmaster()	2019-08-27 09:43:59 +02:00
ide	…
idle	x86/intel: Aggregate microserver naming	2019-08-28 11:29:32 +02:00
iio	iio: adc: max9611: Fix too short conversion time delay	2020-01-09 10:19:43 +01:00
infiniband	IB/mlx5: Fix steering rule of drop and count	2020-01-09 10:19:50 +01:00
input	Input: ili210x - handle errors from input_mt_init_slots()	2020-01-04 19:17:34 +01:00
interconnect	interconnect: qcom: qcs404: Walk the list safely on node removal	2019-12-17 19:55:39 +01:00
iommu	iommu/vt-d: Remove incorrect PSI capability check	2020-01-09 10:20:02 +01:00
ipack	…
irqchip	irqchip: ingenic: Error out if IRQ domain creation failed	2020-01-04 19:17:22 +01:00
isdn	net: use skb_queue_empty_lockless() in poll() handlers	2019-10-28 13:33:41 -07:00
leds	leds: trigger: netdev: fix handling on interface rename	2020-01-04 19:17:05 +01:00
lightnvm	lightnvm: print error when target is not found	2019-09-05 13:17:01 -06:00
macintosh	cpufreq: Use per-policy frequency QoS	2019-10-21 02:05:21 +02:00
mailbox	mailbox: imx: Fix Tx doorbell shutdown path	2020-01-04 19:18:30 +01:00
mcb	…
md	md: raid1: check rdev before reference in raid1_sync_request func	2020-01-09 10:19:48 +01:00
media	media: usb: fix memory leak in af9005_identify_state	2020-01-09 10:20:05 +01:00
memory	iommu/mediatek: Clean up struct mtk_smi_iommu	2019-08-30 15:57:27 +02:00
memstick	memstick: jmb38x_ms: Fix an error handling path in 'jmb38x_ms_probe()'	2019-10-09 11:08:03 +02:00
message	…
mfd	mfd: mt6397: Fix probe after changing mt6397-core	2019-10-24 08:49:25 +01:00
misc	habanalabs: skip VA block list update in reset flow	2020-01-04 19:18:18 +01:00
mmc	mmc: sdhci-of-esdhc: re-implement erratum A-009204 workaround	2020-01-04 19:19:19 +01:00
mtd	mtd: rawnand: Change calculating of position page containing BBM	2019-12-17 19:55:54 +01:00
mux	…
net	net: ena: fix napi handler misbehavior when the napi budget is zero	2020-01-04 19:19:17 +01:00
nfc	NFC: nxp-nci: Fix probing without ACPI	2019-12-31 16:41:49 +01:00
ntb	NTB: fix IDT Kconfig typos/spellos	2019-09-23 17:20:40 -04:00
nubus	…
nvdimm	libnvdimm/btt: fix variable 'rc' set but not used	2020-01-04 19:18:12 +01:00
nvme	nvme/pci: Fix read queue count	2020-01-09 10:19:43 +01:00
nvmem	nvmem: imx-ocotp: reset error status on probe	2019-12-31 16:44:42 +01:00
of	of: overlay: add_changeset_property() memory leak	2020-01-09 10:20:03 +01:00
opp	opp: Reinitialize the list_kref before adding the static OPPs again	2019-10-23 10:58:44 +05:30
oprofile	…
parisc	parisc: Remove 32-bit DMA enforcement from sba_iommu	2019-10-14 21:44:26 +02:00
parport	parport: load lowlevel driver if ports not found	2019-12-31 16:45:25 +01:00
pci	PCI: Add a helper to check Power Resource Requirements _PR3 existence	2020-01-09 10:19:52 +01:00
pcmcia	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
perf	Merge branches 'for-next/52-bit-kva', 'for-next/cpu-topology', 'for-next/error-injection', 'for-next/perf', 'for-next/psci-cpuidle', 'for-next/rng', 'for-next/smpboot', 'for-next/tbi' and 'for-next/tlbi' into for-next/core	2019-08-30 12:46:12 +01:00
phy	phy: renesas: rcar-gen3-usb2: Use platform_get_irq_optional() for optional irq	2020-01-09 10:20:05 +01:00
pinctrl	pinctrl: baytrail: Really serialize all register accesses	2019-12-31 16:46:12 +01:00
platform	platform/x86: pmc_atom: Add Siemens CONNECT X300 to critclk_systems DMI table	2020-01-09 10:20:03 +01:00
pnp	…
power	power: supply: cpcap-battery: Check voltage before orderly_poweroff	2019-12-31 16:44:12 +01:00
powercap	Power management updates for 5.4-rc1	2019-09-17 19:15:14 -07:00
pps	…
ps3	…
ptp	ptp: fix the race between the release of ptp_clock and cdev	2020-01-04 19:18:48 +01:00
pwm	pwm: bcm-iproc: Prevent unloading the driver module while in use	2019-11-08 18:38:06 +01:00
rapidio	…
ras	…
regulator	regulator: ab8500: Remove AB8505 USB regulator	2020-01-09 10:20:04 +01:00
remoteproc	remoteproc updates for v5.4	2019-09-22 10:55:08 -07:00
reset	reset: fix of_reset_control_get_count kerneldoc comment	2019-10-24 10:26:33 +02:00
rpmsg	rpmsg: glink: Free pending deferred work on remove	2019-12-21 11:04:41 +01:00
rtc	rtc: disable uie before setting time and enable after	2019-12-17 19:56:52 +01:00
s390	s390/zcrypt: handle new reply code FILTERED_BY_HYPERVISOR	2020-01-04 19:18:27 +01:00
sbus	…
scsi	scsi: lpfc: Fix rpi release when deleting vport	2020-01-09 10:20:01 +01:00
sfi	…
sh	…
siox	…
slimbus	…
soc	soc: mediatek: cmdq: fixup wrong input order of write api	2019-12-13 08:42:40 +01:00
soundwire	soundwire: intel: fix PDI/stream mapping for Bulk	2019-12-31 16:45:11 +01:00
spi	spi: uniphier: Fix FIFO threshold	2020-01-09 10:20:04 +01:00
spmi	…
ssb	ssb: make array pwr_info_offset static const, makes object smaller	2019-09-13 17:23:18 +03:00
staging	staging/wlan-ng: add CRC32 dependency in Kconfig	2020-01-09 10:19:46 +01:00
target	scsi: target: iscsi: Wait for all commands to finish before freeing a session	2020-01-04 19:18:17 +01:00
tc	…
tee	tee/shm: untag user pointers in tee_shm_register	2019-09-25 17:51:41 -07:00
thermal	thermal: Fix deadlock in thermal thermal_zone_device_check	2019-12-13 08:43:21 +01:00
thunderbolt	thunderbolt: Power cycle the router if NVM authentication fails	2019-12-04 22:30:50 +01:00
tty	tty: serial: msm_serial: Fix lockup for sysrq and oops	2020-01-09 10:20:05 +01:00
uio	Char/Misc driver patches for 5.4-rc1	2019-09-18 11:14:31 -07:00
usb	usb: gadget: fix wrong endpoint desc	2020-01-09 10:19:47 +01:00
vfio	vfio/pci: call irq_bypass_unregister_producer() before freeing irq	2019-12-21 11:04:48 +01:00
vhost	vhost/vsock: accept only packets with the right dst_cid	2020-01-04 19:19:18 +01:00
video	video/hdmi: Fix AVI bar unpack	2019-12-17 19:56:42 +01:00
virt	virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr	2019-10-10 14:50:32 +02:00
virtio	virtio-balloon: fix managed page counts when migrating pages between zones	2019-12-17 19:55:56 +01:00
visorbus	…
vlynq	…
vme	…
w1	w1: ds250x: Fix build error without CRC16	2019-10-10 15:35:41 +02:00
watchdog	watchdog: tqmx86_wdt: Fix build error	2020-01-09 10:20:03 +01:00
xen	xen/balloon: fix ballooned page accounting without hotplug enabled	2020-01-09 10:19:51 +01:00
zorro	…
Kconfig	Staging/IIO driver patches for 5.4-rc1	2019-09-18 11:05:34 -07:00
Makefile	Staging/IIO driver patches for 5.4-rc1	2019-09-18 11:05:34 -07:00