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[PATCH] mmc: properly use the new multi block-write error handling

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Use the new multi block-write error reporting flag and properly tell the block
layer how much data was transferred before the error.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pierre Ossman 2006-10-04 02:15:41 -07:00 committed by Linus Torvalds
parent 7104e2d5a8
commit 176f00ffed
1 changed files with 17 additions and 7 deletions
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24
drivers/mmc/mmc_block.c
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@ -158,13 +158,13 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->data;
struct mmc_card *card = md->queue.card;
struct mmc_blk_request brq;
int ret;
if (mmc_card_claim_host(card))
goto cmd_err;
do {
struct mmc_blk_request brq;
struct mmc_command cmd;
u32 readcmd, writecmd;
@ -278,17 +278,27 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
cmd_err:
mmc_card_release_host(card);
ret = 1;
/*
* This is a little draconian, but until we get proper
* error handling sorted out here, its the best we can
* do - especially as some hosts have no idea how much
* data was transferred before the error occurred.
* For writes and where the host claims to support proper
* error reporting, we first ok the successful blocks.
*
* For reads we just fail the entire chunk as that should
* be safe in all cases.
*/
if (rq_data_dir(req) != READ &&
(card->host->caps & MMC_CAP_MULTIWRITE)) {
spin_lock_irq(&md->lock);
ret = end_that_request_chunk(req, 1, brq.data.bytes_xfered);
spin_unlock_irq(&md->lock);
}
spin_lock_irq(&md->lock);
do {
while (ret) {
ret = end_that_request_chunk(req, 0,
req->current_nr_sectors << 9);
} while (ret);
}
add_disk_randomness(req->rq_disk);
blkdev_dequeue_request(req);