mmc: block: add eMMC hardware reset support

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For cards that support hardware reset (just eMMC), try a reset and
retry before returning an I/O error.  However this is not done for
ECC errors and is never done twice for the same operation type
(READ, WRITE, DISCARD, SECURE DISCARD) until that type of operation
again succeeds.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

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This commit is contained in:

Adrian Hunter 2011-08-29 16:42:15 +03:00 • committed by Chris Ball

parent 2311344c33

commit 67716327ee

2 changed files with 144 additions and 61 deletions

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201

drivers/mmc/card/block.c

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4

drivers/mmc/core/core.c

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