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aab2ee0391
tmp_suning_uos_patched/drivers
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Geert Uytterhoeven aab2ee0391 mmc: block: Let MMC_IOC_MULTI_CMD return zero again for zero entries 
With gcc 4.1.2:

    drivers/mmc/core/block.c: In function ‘mmc_blk_ioctl_cmd_issue’:
    drivers/mmc/core/block.c:630: warning: ‘ioc_err’ may be used uninitialized in this function

Indeed, if mq_rq->ioc_count is zero, an uninitialized value will be
stored in mq_rq->drv_op_result and passed to blk_end_request_all().

Can mq_rq->ioc_count be zero?
  - mmc_blk_ioctl_cmd() sets ioc_count to 1, so this is safe,
  - mmc_blk_ioctl_multi_cmd() obtains ioc_count from user space in
    response to the MMC_IOC_MULTI_CMD ioctl, and does allow zero.

To avoid returning an uninitialized value, and as it is pointless to do
all this work when the MMC_IOC_MULTI_CMD ioctl is used with zero
entries, check for this early in mmc_blk_ioctl_multi_cmd(), and return
zero, like was returned before.

Fixes: 3ecd8cf23f ("mmc: block: move multi-ioctl() to use block layer")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2017-07-11 16:27:49 +02:00
..
accessibility
acpi Device properties framework updates for v4.13-rc1 2017-07-10 15:23:45 -07:00
amba
android
ata Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-07-06 09:41:58 -07:00
atm
auxdisplay
base Merge branch 'akpm' (patches from Andrew) 2017-07-10 16:58:42 -07:00
bcma
block ARM: fix rd_size declaration 2017-07-10 16:32:34 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
bus main drm pull for v4.13 2017-07-09 18:48:37 -07:00
cdrom
char Some small fixes for IPMI, and one medium sized changed. 2017-07-10 10:59:29 -07:00
clk ARM: Device-tree updates 2017-07-04 14:37:25 -07:00
clocksource ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
connector
cpufreq More power management updates for v4.13-rc1 2017-07-10 15:16:21 -07:00
cpuidle powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
crypto This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
dax Writeback error handling fixes (pile #2) 2017-07-07 19:38:17 -07:00
dca
devfreq
dio
dma dmaengine updates for 4.13-rc1 2017-07-08 12:36:50 -07:00
dma-buf
edac
eisa
extcon
firewire
firmware This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
fmc
fpga
fsi
gpio Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
gpu main drm pull for v4.13 2017-07-09 18:48:37 -07:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2017-07-10 09:22:48 -07:00
hsi HSI changes for the v4.13 series 2017-07-04 14:28:22 -07:00
hv SCSI misc on 20170704 2017-07-06 12:10:33 -07:00
hwmon
hwspinlock
hwtracing Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
i2c Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
ide
idle
iio hwmon updates for v4.13: 2017-07-04 11:48:27 -07:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-07-07 17:06:28 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-07-08 12:39:37 -07:00
iommu This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
ipack
irqchip arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
isdn Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 13:13:32 -07:00
leds LED updates for 4.13 2017-07-06 11:32:40 -07:00
lguest
lightnvm
macintosh Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 13:13:32 -07:00
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2017-07-07 10:24:07 -07:00
mcb
md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-07-08 12:50:18 -07:00
media main drm pull for v4.13 2017-07-09 18:48:37 -07:00
memory ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
memstick
message
mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-07-08 12:39:37 -07:00
misc powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
mmc mmc: block: Let MMC_IOC_MULTI_CMD return zero again for zero entries 2017-07-11 16:27:49 +02:00
mtd This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
mux
net pci-v4.13-changes 2017-07-08 15:51:57 -07:00
nfc
ntb
nubus
nvdimm libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
nvme pci-v4.13-changes 2017-07-08 15:51:57 -07:00
nvmem
of Device properties framework updates for v4.13-rc1 2017-07-10 15:23:45 -07:00
oprofile
parisc parisc: ->mapping_error 2017-07-05 21:46:42 +02:00
parport
pci pci-v4.13-changes 2017-07-08 15:51:57 -07:00
pcmcia
perf
phy
pinctrl This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
platform Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
pnp This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
power power supply and reset changes for the v4.13 series 2017-07-04 14:25:14 -07:00
powercap
pps
ps3
ptp ptp: dte: Use LL suffix for 64-bit constants 2017-07-06 11:40:58 +01:00
pwm
rapidio
ras arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
regulator Merge remote-tracking branches 'regulator/topic/settle', 'regulator/topic/tps65910' and 'regulator/topic/tps65917' into regulator-next 2017-07-03 16:52:21 +01:00
remoteproc
reset ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
rpmsg rpmsg updates for v4.13 2017-07-06 15:38:31 -07:00
rtc
s390 libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
sbus
scsi SCSI misc on 20170704 2017-07-06 12:10:33 -07:00
sfi
sh drivers/sh/intc/virq.c: delete an error message for a failed memory allocation in add_virq_to_pirq() 2017-07-06 16:24:30 -07:00
sn
soc ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
spi Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-08 10:41:53 -07:00
spmi
ssb
staging Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2017-07-10 09:22:48 -07:00
target Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 14:35:57 -07:00
tc
tee
thermal Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
thunderbolt
tty This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
uio
usb USB fixes for 4.13-rc1 2017-07-07 13:42:04 -07:00
uwb driver core patches for 4.13-rc1 2017-07-03 20:27:48 -07:00
vfio
vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
video main drm pull for v4.13 2017-07-09 18:48:37 -07:00
virt
virtio
vlynq
vme
w1
watchdog
xen This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
zorro
Kconfig
Makefile