openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity
linux/drivers
History
Xiaofei Tan 6ba0fbc35a scsi: hisi_sas: fix the risk of freeing slot twice 
The function hisi_sas_slot_task_free() is used to free the slot and do
tidy-up of LLDD resources. The LLDD generally should know the state of
a slot and decide when to free it, and it should only be done once.

For some scenarios, we really don't know the state, like when TMF
timeout. In this case, we check task->lldd_task before calling
hisi_sas_slot_task_free().

However, we may miss some scenarios when we should also check
task->lldd_task, and it is not SMP safe to check task->lldd_task as we
don't protect it within spin lock.

This patch is to fix this risk of freeing slot twice, as follows:

  1. Check task->lldd_task in the hisi_sas_slot_task_free(), and give
     up freeing of this time if task->lldd_task is NULL.

  2. Set slot->buf to NULL after it is freed.

Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
 		2017-10-25 08:21:04 -04:00
..
accessibility
…
acpi libnvdimm for 4.14 2017-09-11 13:10:57 -07:00
amba
…
android ANDROID: binder: don't queue async transactions to thread. 2017-09-01 09:22:50 +02:00
ata Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-09-06 22:41:21 -07:00
atm
…
auxdisplay
…
base dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
bcma
…
block The highlights include: 2017-09-12 20:03:53 -07:00
bluetooth
…
bus ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
cdrom
…
char dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
clk The diff is dominated by the Allwinner A10/A20 SoCs getting converted to 2017-09-13 11:04:14 -07:00
clocksource Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 13:06:34 -07:00
connector
…
cpufreq ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
cpuidle Power management updates for v4.14-rc1 2017-09-05 12:19:08 -07:00
crypto dmaengine updates for 4.14-rc1 2017-09-07 14:03:05 -07:00
dax dax: fix FS_DAX=n BLOCK=y compilation 2017-09-03 10:17:53 -07:00
dca
…
devfreq
…
dio
…
dma dmaengine updates for 4.14-rc1 2017-09-07 14:03:05 -07:00
dma-buf
…
edac
…
eisa
…
extcon
…
firewire
…
firmware Just a single conversion to the new UUID API for this merge window. 2017-09-12 13:27:21 -07:00
fmc
…
fpga
…
fsi
…
gpio - New Drivers 2017-09-07 13:51:13 -07:00
gpu Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
hid media updates for v4.14-rc1 2017-09-07 12:53:14 -07:00
hsi
…
hv Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-07 09:25:15 -07:00
hwmon Merge branches 'ib-mfd-arm-i2c-4.14', 'ib-mfd-arm-usb-video-4.14', 'ib-mfd-hwmon-4.14', 'ib-mfd-iio-pwm-4.14', 'ib-mfd-input-rtc-4.14', 'ib-mfd-many-4.14' and 'ib-mfd-pinctrl-regulator-4.14' into ibs-for-mfd-merged 2017-09-05 08:45:36 +01:00
hwspinlock
…
hwtracing
…
i2c Merge branch 'i2c/for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-09-09 14:18:40 -07:00
ide Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
idle Power management updates for v4.14-rc1 2017-09-05 12:19:08 -07:00
iio - New Drivers 2017-09-07 13:51:13 -07:00
infiniband More RDMA work and some op-structure constification from Chuck Lever, 2017-09-09 13:31:49 -07:00
input - New Drivers 2017-09-07 13:51:13 -07:00
iommu IOMMU Updates for Linux v4.14 2017-09-09 15:03:24 -07:00
ipack
…
irqchip Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-09-04 13:08:27 -07:00
isdn isdn: isdnloop: fix logic error in isdnloop_sendbuf 2017-09-07 20:03:54 -07:00
leds LED updates for 4.14 2017-09-07 14:33:13 -07:00
lightnvm
…
macintosh powerpc/macintosh: constify wf_sensor_ops structures 2017-09-01 16:42:54 +10:00
mailbox Just behavorial changes to a controller driver: 2017-09-07 13:23:37 -07:00
mcb Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
md Merge branch 'for-4.14/block-postmerge' of git://git.kernel.dk/linux-block 2017-09-09 12:49:01 -07:00
media dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
memory ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
memstick
…
message scsi: scsi_transport_sas: switch to bsg-lib for SMP passthrough 2017-08-29 21:51:45 -04:00
mfd - New Drivers 2017-09-07 13:51:13 -07:00
misc pci-v4.14-changes 2017-09-08 15:47:43 -07:00
mmc mmc: renesas_sdhi: Add r8a7743/5 support 2017-09-01 15:31:01 +02:00
mtd MTD changes for 4.14: 2017-09-09 14:48:21 -07:00
mux
…
net dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
nfc
…
ntb
…
nubus
…
nvdimm libnvdimm for 4.14 2017-09-11 13:10:57 -07:00
nvme nvme-pci: implement the HMB entry number and size limitations 2017-09-11 12:29:40 -04:00
nvmem
…
of dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
oprofile
…
parisc
…
parport Char/Misc drivers for 4.14-rc1 2017-09-05 11:08:17 -07:00
pci pci-v4.14-changes 2017-09-08 15:47:43 -07:00
pcmcia
…
perf
…
phy pci-v4.14-changes 2017-09-08 15:47:43 -07:00
pinctrl - New Drivers 2017-09-07 13:51:13 -07:00
platform platform-drivers-x86 for v4.14-1 2017-09-08 16:04:50 -07:00
pnp
…
power power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
powercap
…
pps drivers/pps: use surrounding "if PPS" to remove numerous dependency checks 2017-09-08 18:26:51 -07:00
ps3
…
ptp
…
pwm pwm: Changes for v4.14-rc1 2017-09-11 13:04:32 -07:00
rapidio
…
ras
…
regulator - New Drivers 2017-09-07 13:51:13 -07:00
remoteproc rpmsg updates for v4.14 2017-09-09 14:34:38 -07:00
reset ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
rpmsg rpmsg: glink: initialize ret to zero to ensure error status check is correct 2017-09-04 10:52:30 -07:00
rtc RTC for 4.14 2017-09-13 10:56:00 -07:00
s390 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2017-09-12 06:01:59 -07:00
sbus
…
scsi scsi: hisi_sas: fix the risk of freeing slot twice 2017-10-25 08:21:04 -04:00
sfi
…
sh
…
sn
…
soc ARM: SoC driver updates for v4.14 2017-09-10 20:40:00 -07:00
spi ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
spmi
…
ssb
…
staging MTD changes for 4.14: 2017-09-09 14:48:21 -07:00
target Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block 2017-09-07 11:59:42 -07:00
tc
…
tee
…
thermal Merge branches 'thermal-core', 'thermal-soc', 'thermal-intel' and 'const-thermal-zone-structure' into next 2017-09-08 11:20:04 +08:00
thunderbolt ACPI updates for v4.14-rc1 2017-09-05 12:45:03 -07:00
tty Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2017-09-10 09:57:23 -07:00
uio
…
usb dma-mapping updates for 4.14: 2017-09-12 13:30:06 -07:00
uwb
…
vfio vfio: platform: constify amba_id 2017-08-30 14:03:42 -06:00
vhost lib/interval_tree: fast overlap detection 2017-09-08 18:26:49 -07:00
video - Fix-ups 2017-09-07 13:55:16 -07:00
virt
…
virtio SCSI misc on 20170907 2017-09-07 21:11:05 -07:00
vlynq
…
vme
…
w1 power supply and reset changes for the v4.14 series 2017-09-09 14:44:39 -07:00
watchdog mfd: twl: Move header file out of I2C realm 2017-09-04 14:41:02 +01:00
xen xen: fixes and features for 4.14 2017-09-07 10:24:21 -07:00
zorro
…
Kconfig
…
Makefile
…