mmc: increase SD write timeout for crappy cards

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>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 044d84eeed7c..f7284b905eb3 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -280,7 +280,11 @@ void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
                         (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;