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| author | Pierre Ossman <drzeus@drzeus.cx> | 2006-11-21 17:54:23 +0100 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-02-04 20:54:10 +0100 |
| commit | fe4a3c7a20f14d86022a8132adbf6ddb98e7197c (patch) | |
| tree | 0719b8eb2d8c04c286095365ebff3d29285a5796 /drivers/mmc/wbsd.c | |
| parent | tifm_sd: add suspend and resume functionality (diff) | |
| download | linux-fe4a3c7a20f14d86022a8132adbf6ddb98e7197c.tar.xz linux-fe4a3c7a20f14d86022a8132adbf6ddb98e7197c.zip | |
mmc: Allow host drivers to specify a max block size
Most controllers have an upper limit on the block size. Allow the host
drivers to specify this and make sure we avoid hitting this limit.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/wbsd.c')
| -rw-r--r-- | drivers/mmc/wbsd.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c index 7a282672f8e9..5711beecb4e8 100644 --- a/drivers/mmc/wbsd.c +++ b/drivers/mmc/wbsd.c @@ -1354,6 +1354,12 @@ static int __devinit wbsd_alloc_mmc(struct device *dev) */ mmc->max_seg_size = mmc->max_sectors * 512; + /* + * Maximum block size. We have 12 bits (= 4095) but have to subtract + * space for CRC. So the maximum is 4095 - 4*2 = 4087. + */ + mmc->max_blk_size = 4087; + dev_set_drvdata(dev, mmc); return 0; |