tree 40bff3a9b00b7e8f5b5f5d4871e9b4cf00b445cf
parent 92add82e0ce0946d7aa6f2ae71cd160d914d2f48
author Daniel Glöckner <dg@emlix.com> 1472559450 +0200
committer Ulf Hansson <ulf.hansson@linaro.org> 1474918277 +0200

mmc: block: don't use CMD23 with very old MMC cards

CMD23 aka SET_BLOCK_COUNT was introduced with MMC v3.1.
Older versions of the specification allowed to terminate
multi-block transfers only with CMD12.

The patch fixes the following problem:

  mmc0: new MMC card at address 0001
  mmcblk0: mmc0:0001 SDMB-16 15.3 MiB
  mmcblk0: timed out sending SET_BLOCK_COUNT command, card status 0x400900
  ...
  blk_update_request: I/O error, dev mmcblk0, sector 0
  Buffer I/O error on dev mmcblk0, logical block 0, async page read
   mmcblk0: unable to read partition table

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>