From 881d1c25f765938a95def5afe39486ce39f9fc96 Mon Sep 17 00:00:00 2001 From: Seungwon Jeon Date: Fri, 14 Oct 2011 14:03:21 +0900 Subject: 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 Signed-off-by: Jaehoon Chung Signed-off-by: Chris Ball --- drivers/mmc/card/block.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) (limited to 'drivers/mmc/card') 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; } /* -- cgit v1.2.3-59-g8ed1b