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authorSonic Zhang <sonic.zhang@analog.com>2010-07-12 15:50:56 +0800
committerChris Ball <cjb@laptop.org>2010-10-23 21:11:22 +0800
commit061c6c847eeb11743e489a16e907b41c6f9042b6 (patch)
tree37bb835b50342cc459366e36da1117b137760f6d /Documentation/devices.txt
parent95f25efe0ce22e28d61722d655d2ef582f5f7520 (diff)
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mmc_spi: Recover from CRC errors for r/w operation over SPI.
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>
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