mmc: block: don't use CMD23 with very old MMC cards
authorDaniel Glöckner <dg@emlix.com>
Tue, 30 Aug 2016 12:17:30 +0000 (14:17 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 28 Oct 2016 07:01:26 +0000 (03:01 -0400)
commitbc7e4a29a556f753ed916cdd90f6f860d7d9a5cb
tree91bea70589a8e844f4a8bad13a1914cac1799cb8
parent7dcd1cd07760224f046713e7234113d08f151f06
mmc: block: don't use CMD23 with very old MMC cards

commit 0ed50abb2d8fc81570b53af25621dad560cd49b3 upstream.

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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/mmc/card/block.c