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authorPierre Ossman <drzeus@drzeus.cx>2006-11-21 17:54:23 +0100
committerPierre Ossman <drzeus@drzeus.cx>2007-02-04 20:54:10 +0100
commitfe4a3c7a20f14d86022a8132adbf6ddb98e7197c (patch)
tree0719b8eb2d8c04c286095365ebff3d29285a5796 /drivers/mmc/mmc.c
parentdba4accab17bd2e2e09088f746257a8c14af1cc2 (diff)
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.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index b48c277312d..9bda3fddad1 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;