Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Jon Hunter 2a24bb28a3 serial: tegra: Handle another RX race condition ... Commit 853a699739 ("serial: tegra: handle race condition on uart rx side") attempted to fix a race condition between the RX end of transmission interrupt and RX DMA completion callback. Despite this fix there is still another case where these two paths can race and result in duplicated data. The race condition is as follows: 1. DMA completion interrupt occurs and schedules tasklet to call DMA callback. 2. DMA callback for the UART driver starts to execute. This will copy the data from the DMA buffer and restart the DMA. This is done under uart port spinlock. 3. During the callback, UART interrupt is raised for end of receive. The UART ISR runs and waits to acquire port spinlock held by the DMA callback. 4. DMA callback gives up spinlock after copying the data, but before restarting DMA. 5. UART ISR acquires the spin lock and reads the same DMA buffer because DMA has not been restarted yet. The release of the spinlock during the DMA callback was introduced by commit 9b88748b36 ("tty: serial: tegra: drop uart_port->lock before calling tty_flip_buffer_push()") to fix a spinlock lock-up issue when calling tty_flip_buffer_push(). However, since then commit a9c3f68f3c ("tty: Fix low_latency BUG") migrated tty_flip_buffer_push() to always use a workqueue, allowing tty_flip_buffer_push() to be called from within atomic sections. Therefore, we can remove the unlocking of the spinlock from the DMA callback and UART ISR and this will ensure that the race condition no longer occurs. Reported-by: Christopher Freeman <cfreeman@nvidia.com> Signed-off-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-10-17 21:07:57 -07:00
..
accessibility
acpi	Merge branch 'acpi-ec'	2015-10-01 22:30:35 +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	regmap: Fixes for v4.3	2015-10-07 14:15:49 +01:00
bcma
block	blk-mq: fix racy updates of rq->errors	2015-10-01 10:10:55 +02:00
bluetooth	Bluetooth: hci_bcm: Fix crash on suspend	2015-08-28 21:09:14 +02:00
bus	arm-cci500: Don't enable PMU driver by default	2015-09-28 16:31:17 -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	Merge branch 'for-4.3-rc/ti-clk-fixes' of https://github.com/t-kristo/linux-pm into clk-fixes	2015-10-02 11:22:23 -07:00
clocksource	clocksource/drivers/keystone: Fix bad NO_IRQ usage	2015-09-29 14:33:51 +02:00
connector
cpufreq	cpufreq: prevent lockup on reading scaling_available_frequencies	2015-10-08 21:47:56 +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 double kfree	2015-10-02 11:05:58 +09:00
dio
dma	dmaengine fixes for 4.3-rc4	2015-10-02 14:46:15 -04:00
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	arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME regions	2015-10-01 12:51:28 +02:00
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: add some defines for logical/physical ports	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: (pwm-fan) Fix module autoload for OF platform driver	2015-09-20 17:50:19 -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	intel_idle: Skylake Client Support - updated	2015-09-10 14:03:44 -04:00
iio	This is the bulk of GPIO changes for the v4.3 kernel cycle:	2015-09-04 10:07:45 -07:00
infiniband	Changes for 4.3-rc4	2015-10-01 16:38:52 -04:00
input	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2015-10-02 17:53:25 -04:00
iommu	Merge git://git.infradead.org/intel-iommu	2015-10-02 07:59:29 -04:00
ipack
irqchip	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-10-04 11:40:09 +01:00
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	mcb: Fix error handling in mcb_pci_probe()	2015-10-05 05:10:01 +01:00
md	One bug fix for raid1/raid10.	2015-10-11 09:35:51 -07:00
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	mptfusion: prevent some memory corruption	2015-08-26 07:11:45 -07:00
mfd	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
misc	mei: hbm: fix error in state check logic	2015-10-04 12:19:23 +01:00
mmc	mmc: sdhci-of-at91: use SDHCI_QUIRK2_NEED_DELAY_AFTER_INT_CLK_RST quirk	2015-10-08 19:55:05 +02:00
mtd	A few MTD fixes:	2015-10-07 09:35:15 +01:00
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2015-10-01 21:55:35 -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	nvmem: sunxi: Check for memory allocation failure	2015-10-04 12:09:43 +01:00
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	Merge branches 'pm-pci' and 'acpi-pci'	2015-10-01 22:30:12 +02:00
pcmcia	pcmcia: soc_common: remove skt_dev_info's clk pointer	2015-09-03 16:01:03 +01:00
perf
phy	phy: berlin-sata: Fix module autoload for OF platform driver	2015-09-25 17:01:14 +05:30
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 remote-tracking branch 'regulator/fix/axp20x' into regulator-linus	2015-10-06 12:00:42 +01:00
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	SCSI fixes on 20151010	2015-10-11 10:02:30 -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/davinci' and 'spi/fix/sh-msiof' into spi-linus	2015-10-07 11:43:39 +01:00
spmi	genirq: Remove irq argument from irq flow handlers	2015-09-16 15:47:51 +02:00
ssb
staging	staging: speakup: fix speakup-r regression	2015-10-04 19:57:20 +01:00
target	iscsi-target: Avoid OFMarker + IFMarker negotiation	2015-09-24 23:24:46 -07:00
tc
thermal	thermal: avoid division by zero in power allocator	2015-10-01 21:42:35 -04:00
thunderbolt	thunderbolt: Allow loading of module on recent Apple MacBooks with thunderbolt 2 controller	2015-09-20 15:20:11 -07:00
tty	serial: tegra: Handle another RX race condition	2015-10-17 21:07:57 -07:00
uio
usb	usb: Add device quirk for Logitech PTZ cameras	2015-10-04 11:01:13 +01:00
uwb
vfio
vhost	virtio: fixes on top of 4.3-rc1	2015-09-18 09:28:20 -07:00
video	video: of: fix memory leak	2015-10-07 14:13:59 +03:00
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	watchdog: iTCO: Fix dependencies on I2C	2015-09-28 10:56:10 +02:00
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