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mmc: Allow host drivers to specify a max block size

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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>
This commit is contained in:
Pierre Ossman
2006-11-21 17:54:23 +01:00
parent dba4accab1
commit fe4a3c7a20
12 changed files with 44 additions and 12 deletions
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4
drivers/mmc/mmc.c
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@ -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;