From b3bf915308ca2b50f3beec6cc824083870f0f4b5 Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Tue, 18 Oct 2011 09:34:04 +0900 Subject: mmc: core: new discard feature support at eMMC v4.5 MMC v4.5 supports the DISCARD feature (CMD38). It's different from trim and there's no check bit. Currently it's only supported at v4.5. Signed-off-by: Kyungmin Park Signed-off-by: Jaehoon Chung Signed-off-by: Chris Ball --- drivers/mmc/card/block.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/mmc/card') diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index e85816e1634a..370472797fff 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -756,7 +756,9 @@ static int mmc_blk_issue_discard_rq(struct mmc_queue *mq, struct request *req) from = blk_rq_pos(req); nr = blk_rq_sectors(req); - if (mmc_can_trim(card)) + if (mmc_can_discard(card)) + arg = MMC_DISCARD_ARG; + else if (mmc_can_trim(card)) arg = MMC_TRIM_ARG; else arg = MMC_ERASE_ARG; -- cgit v1.2.3-59-g8ed1b