linux/drivers/mmc
Grant Grundler b093410c9a mmc: block: copy resp[] data on err for MMC_IOC_MULTI_CMD
MMC_IOC_CMD and MMC_IOC_MULTI_CMD ioctl() code currently bails on
any eMMC errors. However, in case there is any resp[] data, we
should attempt to copy resp[] back to user space. The user app
can then determine which command(s) failed in the MMC_IOC_MULTI_CMD
case AND/OR report better diagnostics in both cases.

Gwendal Grignou provided the idea and it was previously implemented
and tested on v3.18 ChromeOS kernel:
    https://chromium-review.googlesource.com/#/c/299956

Signed-off-by: Grant Grundler <grundler@chromium.org>
Reviewed-by: Hyung Taek Ryoo <hryoo@nvidia.com>
Reviewed-by: Gwendal Grignou <gwendal@chromium.org>
Tested-by: David Riley <davidriley@chromium.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2015-10-26 16:00:03 +01:00
..
card mmc: block: copy resp[] data on err for MMC_IOC_MULTI_CMD 2015-10-26 16:00:03 +01:00
core mmc: debugfs: implement ios show for SDR12 and SDR25 2015-10-26 16:00:02 +01:00
host mmc: sunxi: Add card busy detection 2015-10-26 16:00:02 +01:00
Kconfig
Makefile mmc: sdhci-pci: add platform data 2012-01-11 23:58:47 -05:00