diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2007-05-12 00:26:16 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-07-09 21:22:53 +0200 |
| commit | 98ccf14909ba02a41c5925b0b2c92aeeef23d3b9 (patch) | |
| tree | 331b645ee008f858305f7406f4639119b275ff82 /drivers/mmc/card/block.c | |
| parent | 7dcca30a32aadb0520417521b0c44f42d09fe05c (diff) | |
mmc: bounce requests for simple hosts
Some hosts cannot do scatter/gather in hardware. Since not doing sg
is such a big performance hit, we (optionally) bounce the requests
to a simple linear buffer that we hand over to the driver.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers/mmc/card/block.c')
| -rw-r--r-- | drivers/mmc/card/block.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 540ff4bea54..cbd4b6e3e17 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -262,7 +262,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) } brq.data.sg = mq->sg; - brq.data.sg_len = blk_rq_map_sg(req->q, req, brq.data.sg); + brq.data.sg_len = mmc_queue_map_sg(mq); + + mmc_queue_bounce_pre(mq); if (brq.data.blocks != (req->nr_sectors >> (md->block_bits - 9))) { @@ -279,6 +281,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) } mmc_wait_for_req(card->host, &brq.mrq); + + mmc_queue_bounce_post(mq); + if (brq.cmd.error) { printk(KERN_ERR "%s: error %d sending read/write command\n", req->rq_disk->disk_name, brq.cmd.error); |