mmc_spi: Recover from CRC errors for r/w operation over SPI.

Browse source

The SPI bus is not reliable for large data transfers on all platforms.
The current mmc_spi driver fails SD read/write commands immediately if
occasional CRC errors are reported by the SD device.  This patch makes
the operation recover from CRC errors by repeating the last SD command.
The retry count is set to 5 to ensure the driver passes stress tests.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Chris Ball <cjb@laptop.org>

...

This commit is contained in:

Sonic Zhang 2010-07-12 15:50:56 +08:00 • committed by Chris Ball

parent 95f25efe0c

commit 061c6c847e

1 changed files with 21 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

21

drivers/mmc/host/mmc_spi.c

View file