From 0d7d85ca6e5dc7bd426d1d5989a44e93e8c7a0d3 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Fri, 23 Sep 2011 12:48:20 +0300 Subject: mmc: block: fix boot partition switch error path In the case of a switch error, do not update partition config as though the switch succeeded, and ensure blk_end_request is called on the failed request. Signed-off-by: Adrian Hunter Acked-by: Andrei Warkentin Signed-off-by: Chris Ball --- drivers/mmc/card/block.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 66c7596c5546..d7eb2c082336 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -447,18 +447,23 @@ static inline int mmc_blk_part_switch(struct mmc_card *card, { int ret; struct mmc_blk_data *main_md = mmc_get_drvdata(card); + if (main_md->part_curr == md->part_type) return 0; if (mmc_card_mmc(card)) { - card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; - card->ext_csd.part_config |= md->part_type; + u8 part_config = card->ext_csd.part_config; + + part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK; + part_config |= md->part_type; ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, - EXT_CSD_PART_CONFIG, card->ext_csd.part_config, + EXT_CSD_PART_CONFIG, part_config, card->ext_csd.part_time); if (ret) return ret; + + card->ext_csd.part_config = part_config; } main_md->part_curr = md->part_type; @@ -1273,6 +1278,11 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) ret = mmc_blk_part_switch(card, md); if (ret) { + if (req) { + spin_lock_irq(&md->lock); + __blk_end_request_all(req, -EIO); + spin_unlock_irq(&md->lock); + } ret = 0; goto out; } -- cgit v1.2.3