diff options
author | Ingo Molnar <mingo@elte.hu> | 2008-07-17 23:57:20 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-07-17 23:57:20 +0200 |
commit | 393d81aa026e19b6ede6f5f11955c97ee62e5df5 (patch) | |
tree | a1d9511e488e19d41089ff0a736f6ce52a81c6e5 /drivers/mmc/card/block.c | |
parent | 93a0886e2368eafb9df5e2021fb185195cee88b2 (diff) | |
parent | 5b664cb235e97afbf34db9c4d77f08ebd725335e (diff) |
Merge branch 'linus' into xen-64bit
Diffstat (limited to 'drivers/mmc/card/block.c')
-rw-r--r-- | drivers/mmc/card/block.c | 60 |
1 files changed, 28 insertions, 32 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index f9ad960d7c1..66e5a5487c2 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); |