diff options
| author |   Jaehoon Chung <jh80.chung@samsung.com> | 2011-07-13 17:02:16 +0900 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2011-07-21 10:35:00 -0400 |
| commit | 393f9a08e2ee72e42379489a5781feaf9c406d5f (patch) | |
| tree | 3b360c42c9449e4bcf320ade4c0048b98bfbe4d4 /drivers/mmc | |
| parent | mmc: documentation of mmc non-blocking request usage and design. (diff) | |
| download | linux-dev-393f9a08e2ee72e42379489a5781feaf9c406d5f.tar.xz linux-dev-393f9a08e2ee72e42379489a5781feaf9c406d5f.zip | |
mmc: block: fixed NULL pointer dereference
We already check for ongoing async transfers when handling discard
requests, but not in mmc_blk_issue_flush(). This patch fixes that
omission.
Tested with an SDHCI controller and eMMC4.41.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Per Forlin <per.forlin@linaro.org>
Cc: <stable@kernel.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/card/block.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index 38d01492a52b..1ff5486213fb 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -1200,6 +1200,9 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req) else ret = mmc_blk_issue_discard_rq(mq, req); } else if (req && req->cmd_flags & REQ_FLUSH) { + /* complete ongoing async transfer before issuing flush */ + if (card->host->areq) + mmc_blk_issue_rw_rq(mq, NULL); ret = mmc_blk_issue_flush(mq, req); } else { ret = mmc_blk_issue_rw_rq(mq, req); |