| Message ID | 1617262750-4864-2-git-send-email-cang@codeaurora.org |
|---|---|
| State | New |
| Headers | show |
| Series | [v5,1/2] scsi: ufs: Fix task management request completion timeout | expand |
On 4/1/21 12:39 AM, Can Guo wrote: > ufshcd_tmc_handler() calls blk_mq_tagset_busy_iter(fn = ufshcd_compl_tm()), > but since blk_mq_tagset_busy_iter() only iterates over all reserved tags > and requests which are not in IDLE state, ufshcd_compl_tm() never gets a > chance to run. Thus, TMR always ends up with completion timeout. Fix it by > calling blk_mq_start_request() in __ufshcd_issue_tm_cmd(). Reviewed-by: Bart Van Assche <bvanassche@acm.org>
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index b49555fa..d4f8cb2 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -6464,6 +6464,7 @@ static int __ufshcd_issue_tm_cmd(struct ufs_hba *hba, spin_lock_irqsave(host->host_lock, flags); task_tag = hba->nutrs + free_slot; + blk_mq_start_request(req); treq->req_header.dword_0 |= cpu_to_be32(task_tag);
ufshcd_tmc_handler() calls blk_mq_tagset_busy_iter(fn = ufshcd_compl_tm()), but since blk_mq_tagset_busy_iter() only iterates over all reserved tags and requests which are not in IDLE state, ufshcd_compl_tm() never gets a chance to run. Thus, TMR always ends up with completion timeout. Fix it by calling blk_mq_start_request() in __ufshcd_issue_tm_cmd(). Fixes: 69a6c269c097 ("scsi: ufs: Use blk_{get,put}_request() to allocate and free TMFs") Signed-off-by: Can Guo <cang@codeaurora.org> --- drivers/scsi/ufs/ufshcd.c | 1 + 1 file changed, 1 insertion(+)