On 2021-01-29 11:22, Bart Van Assche wrote:
On 1/27/21 8:16 PM, 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().
Fixes: 69a6c269c097 ("scsi: ufs: Use blk_{get,put}_request() to
allocate and free TMFs")
Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
---
drivers/scsi/ufs/ufshcd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 8da75e6..c0c5925 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6395,6 +6395,7 @@ 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);
blk_mq_start_request() not only marks a request as in-flight but also
starts a timer. However, no timeout handler has been defined in
ufshcd_tmf_ops. Should a timeout handler be defined in that data
structure?
Block mq driver gives 30s as default timeout,
TMR timeout is 100ms in UFS driver. So we don't
need a timeout handler as of now.
Thanks,
Can Guo.
Thanks,
Bart.
