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
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core	mmc: block: Let MMC_IOC_MULTI_CMD return zero again for zero entries	2017-07-11 16:27:49 +02:00
host	mmc: sdhci-acpi: Workaround conflict with PCI wifi on GPD Win handheld	2017-07-11 14:11:59 +02:00
Kconfig	mmc: block: Move files to core	2016-12-12 16:30:05 +01:00
Makefile	mmc: block: Move files to core	2016-12-12 16:30:05 +01:00