[patch 45/49] mmc: increase SD write timeout for crappy cards

Greg KH
2008-11-12T00:43:19Z

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2.6.27-stable review patch. If anyone has any objections, please let us know.

------------------

From: Pierre Ossman <drzeus@drzeus.cx>

commit 493890e75d98810a3470b4aae23be628ee5e9667 upstream.

It seems that some cards are slightly out of spec and occasionally
will not be able to complete a write in the alloted 250 ms [1].
Incease the timeout slightly to allow even these cards to function
properly.

[1] http://lkml.org/lkml/2008/9/23/390

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/mmc/core/core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -280,7 +280,11 @@ void mmc_set_data_timeout(struct mmc_dat
(card->host->ios.clock / 1000);

if (data->flags & MMC_DATA_WRITE)
- limit_us = 250000;
+ /*
+ * The limit is really 250 ms, but that is
+ * insufficient for some crappy cards.
+ */
+ limit_us = 300000;
else
limit_us = 100000;

--