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path: root/drivers/mmc/card/block.c
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Diffstat (limited to 'drivers/mmc/card/block.c')
-rw-r--r--drivers/mmc/card/block.c60
1 files changed, 28 insertions, 32 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index f9ad960d7c1a..66e5a5487c20 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -2,7 +2,7 @@
* Block driver for media (i.e., flash cards)
*
* Copyright 2002 Hewlett-Packard Company
- * Copyright 2005-2007 Pierre Ossman
+ * Copyright 2005-2008 Pierre Ossman
*
* Use consistent with the GNU GPL is permitted,
* provided that this copyright notice is
@@ -237,17 +237,6 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
if (brq.data.blocks > card->host->max_blk_count)
brq.data.blocks = card->host->max_blk_count;
- /*
- * If the host doesn't support multiple block writes, force
- * block writes to single block. SD cards are excepted from
- * this rule as they support querying the number of
- * successfully written sectors.
- */
- if (rq_data_dir(req) != READ &&
- !(card->host->caps & MMC_CAP_MULTIWRITE) &&
- !mmc_card_sd(card))
- brq.data.blocks = 1;
-
if (brq.data.blocks > 1) {
/* SPI multiblock writes terminate using a special
* token, not a STOP_TRANSMISSION request.
@@ -296,22 +285,24 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
mmc_queue_bounce_post(mq);
+ /*
+ * Check for errors here, but don't jump to cmd_err
+ * until later as we need to wait for the card to leave
+ * programming mode even when things go wrong.
+ */
if (brq.cmd.error) {
printk(KERN_ERR "%s: error %d sending read/write command\n",
req->rq_disk->disk_name, brq.cmd.error);
- goto cmd_err;
}
if (brq.data.error) {
printk(KERN_ERR "%s: error %d transferring data\n",
req->rq_disk->disk_name, brq.data.error);
- goto cmd_err;
}
if (brq.stop.error) {
printk(KERN_ERR "%s: error %d sending stop command\n",
req->rq_disk->disk_name, brq.stop.error);
- goto cmd_err;
}
if (!mmc_host_is_spi(card->host) && rq_data_dir(req) != READ) {
@@ -344,6 +335,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
#endif
}
+ if (brq.cmd.error || brq.data.error || brq.stop.error)
+ goto cmd_err;
+
/*
* A block was successfully transferred.
*/
@@ -362,30 +356,32 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
* mark the known good sectors as ok.
*
* If the card is not SD, we can still ok written sectors
- * if the controller can do proper error reporting.
+ * as reported by the controller (which might be less than
+ * the real number of written sectors, but never more).
*
* For reads we just fail the entire chunk as that should
* be safe in all cases.
*/
- if (rq_data_dir(req) != READ && mmc_card_sd(card)) {
- u32 blocks;
- unsigned int bytes;
-
- blocks = mmc_sd_num_wr_blocks(card);
- if (blocks != (u32)-1) {
- if (card->csd.write_partial)
- bytes = blocks << md->block_bits;
- else
- bytes = blocks << 9;
+ if (rq_data_dir(req) != READ) {
+ if (mmc_card_sd(card)) {
+ u32 blocks;
+ unsigned int bytes;
+
+ blocks = mmc_sd_num_wr_blocks(card);
+ if (blocks != (u32)-1) {
+ if (card->csd.write_partial)
+ bytes = blocks << md->block_bits;
+ else
+ bytes = blocks << 9;
+ spin_lock_irq(&md->lock);
+ ret = __blk_end_request(req, 0, bytes);
+ spin_unlock_irq(&md->lock);
+ }
+ } else {
spin_lock_irq(&md->lock);
- ret = __blk_end_request(req, 0, bytes);
+ ret = __blk_end_request(req, 0, brq.data.bytes_xfered);
spin_unlock_irq(&md->lock);
}
- } else if (rq_data_dir(req) != READ &&
- (card->host->caps & MMC_CAP_MULTIWRITE)) {
- spin_lock_irq(&md->lock);
- ret = __blk_end_request(req, 0, brq.data.bytes_xfered);
- spin_unlock_irq(&md->lock);
}
mmc_release_host(card->host);