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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/mmc.c | |
| parent | dba4accab17bd2e2e09088f746257a8c14af1cc2 (diff) | |
| download | lwn-fe4a3c7a20f14d86022a8132adbf6ddb98e7197c.tar.gz lwn-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/mmc.c')
| -rw-r--r-- | drivers/mmc/mmc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index b48c277312de..9bda3fddad17 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -108,6 +108,8 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq) mrq->cmd->error = 0; mrq->cmd->mrq = mrq; if (mrq->data) { + BUG_ON(mrq->data->blksz > host->max_blk_size); + mrq->cmd->data = mrq->data; mrq->data->error = 0; mrq->data->mrq = mrq; @@ -1605,6 +1607,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) host->max_phys_segs = 1; host->max_sectors = 1 << (PAGE_CACHE_SHIFT - 9); host->max_seg_size = PAGE_CACHE_SIZE; + + host->max_blk_size = 512; } return host; |