On Wed, Aug 23, 2023 at 08:12:32PM +0300, Adrian Hunter wrote:
From: Yibin Ding yibin.ding@unisoc.com
commit 4b430d4ac99750ee2ae2f893f1055c7af1ec3dc5 upstream.
For a completed request, after the mmc_blk_mq_complete_rq(mq, req) function is executed, the bitmap_tags corresponding to the request will be cleared, that is, the request will be regarded as idle. If the request is acquired by a different type of process at this time, the issue_type of the request may change. It further caused the value of mq->in_flight[issue_type] to be abnormal, and a large number of requests could not be sent.
p1: p2: mmc_blk_mq_complete_rq blk_mq_free_request blk_mq_get_request blk_mq_rq_ctx_init mmc_blk_mq_dec_in_flight mmc_issue_type(mq, req)
This strategy can ensure the consistency of issue_type before and after executing mmc_blk_mq_complete_rq.
Fixes: 81196976ed94 ("mmc: block: Add blk-mq support") Cc: stable@vger.kernel.org Signed-off-by: Yibin Ding yibin.ding@unisoc.com Acked-by: Adrian Hunter adrian.hunter@intel.com Link: https://lore.kernel.org/r/20230802023023.1318134-1-yunlong.xing@unisoc.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org (cherry picked from commit 4b430d4ac99750ee2ae2f893f1055c7af1ec3dc5) (backport to 4.19.y) Signed-off-by: Adrian Hunter adrian.hunter@intel.com
drivers/mmc/core/block.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)
Now queued up, thanks.
greg k-h