Hi. I send to mailing for [RFC] Kernel NULL pointer dereference. This patch is fixed it.
In similar case, when discard request, check condition and performed mmc_blk_issue_rw_rq(mq, NULL) for ongoing async transfer. But When flush request, entered the mmc_blk_issue_flush() then return. (then didn't complete ongoing aync transfer). I think that need to complete for ongoing aync transfer before flush request. I tested with this patch, it's working fine. (SDHCI controller, eMMC4.41) Signed-off-by: Jaehoon Chung <[email protected]> Signed-off-by: Kyungmin Park <[email protected]> --- 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 38d0149..1ff5486 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); -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
