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| author | Wolfgang Muees <wolfgang.mues@auerswald.de> | 2009-03-11 14:17:43 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2009-03-24 21:30:02 +0100 |
| commit | ea15ba5cd7bb370902cd9f6a73c2d288bfba6b2c (patch) | |
| tree | 9ddf3e768f120407fa5ebe804b13a5d8f1143d80 /drivers/mmc/host | |
| parent | 48881caec426786cd451383ee53943cc5d3bfdeb (diff) | |
| download | op-kernel-dev-ea15ba5cd7bb370902cd9f6a73c2d288bfba6b2c.zip op-kernel-dev-ea15ba5cd7bb370902cd9f6a73c2d288bfba6b2c.tar.gz | |
mmc_spi: wait more bytes for card response
Some cards are slower than the standard allows and need more
time to respond to a command. Max. observed number of bytes
was 12.
Signed-off-by: Wolfgang Muees <wolfgang.mues@auerswald.de>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/mmc_spi.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c index ad9e0e2..69e1442 100644 --- a/drivers/mmc/host/mmc_spi.c +++ b/drivers/mmc/host/mmc_spi.c @@ -279,8 +279,11 @@ static int mmc_spi_response_get(struct mmc_spi_host *host, * so it can always DMA directly into the target buffer. * It'd probably be better to memcpy() the first chunk and * avoid extra i/o calls... + * + * Note we check for more than 8 bytes, because in practice, + * some SD cards are slow... */ - for (i = 2; i < 9; i++) { + for (i = 2; i < 16; i++) { value = mmc_spi_readbytes(host, 1); if (value < 0) goto done; |
