diff options
| author | Bing Zhao <bzhao@marvell.com> | 2010-03-05 13:43:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-06 11:26:36 -0800 |
| commit | 3fb7fb4a01d09f81d1daaf65e52d929734bd691f (patch) | |
| tree | 8feac2d211f833fc1ef287aba3b138886454f45c /drivers/mmc | |
| parent | 729adf1b5f4562f67fe8bf6c1df97edc1128fac7 (diff) | |
sdio: add quirk to clamp byte mode transfer
Some SDIO cards expect byte transfers not to exceed the configured block
transfer size. Add a quirk to that effect.
Patches to make use of this quirk will be sent separately.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/sdio_io.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/core/sdio_io.c b/drivers/mmc/core/sdio_io.c index f9aa8a7deff..87c618904ee 100644 --- a/drivers/mmc/core/sdio_io.c +++ b/drivers/mmc/core/sdio_io.c @@ -189,7 +189,12 @@ static inline unsigned int sdio_max_byte_size(struct sdio_func *func) { unsigned mval = min(func->card->host->max_seg_size, func->card->host->max_blk_size); - mval = min(mval, func->max_blksize); + + if (mmc_blksz_for_byte_mode(func->card)) + mval = min(mval, func->cur_blksize); + else + mval = min(mval, func->max_blksize); + return min(mval, 512u); /* maximum size for byte mode */ } |