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authorSeungwon Jeon <tgih.jun@samsung.com>2011-10-14 14:03:21 +0900
committerChris Ball <cjb@laptop.org>2011-10-26 16:32:28 -0400
commit881d1c25f765938a95def5afe39486ce39f9fc96 (patch)
tree694d5ea1b3fba2c28cc110123f2ca50b4408f309 /drivers/mmc/card/block.c
parent71fe3eb0d006861bdae57e93975b6ae3d9b55e99 (diff)
downloadlinux-linaro-stable-881d1c25f765938a95def5afe39486ce39f9fc96.tar.gz
mmc: core: Add cache control for eMMC4.5 device
This patch adds cache feature of eMMC4.5 Spec. If device supports cache capability, host can utilize some specific operations. Signed-off-by: Seungwon Jeon <tgih.jun@samsung.com> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/card/block.c')
-rw-r--r--drivers/mmc/card/block.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 370472797fff..c0cb225bbb47 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -851,16 +851,18 @@ out:
static int mmc_blk_issue_flush(struct mmc_queue *mq, struct request *req)
{
struct mmc_blk_data *md = mq->data;
+ struct mmc_card *card = md->queue.card;
+ int ret = 0;
+
+ ret = mmc_flush_cache(card);
+ if (ret)
+ ret = -EIO;
- /*
- * No-op, only service this because we need REQ_FUA for reliable
- * writes.
- */
spin_lock_irq(&md->lock);
- __blk_end_request_all(req, 0);
+ __blk_end_request_all(req, ret);
spin_unlock_irq(&md->lock);
- return 1;
+ return ret ? 0 : 1;
}
/*