From: Peter Wang peter.wang@mediatek.com
[ Upstream commit 2a26a11e9c258b14be6fd98f8a85f20ac1fff66e ]
When a dev command times out in MCQ mode, a successfully cleared command should cause a retry. However, because we currently return 0, the caller considers the command a success which causes the following error to be logged: "Invalid offset 0x0 in descriptor IDN 0x9, length 0x0".
Retry if clearing the command was successful.
Signed-off-by: Peter Wang peter.wang@mediatek.com Link: https://lore.kernel.org/r/20240328111244.3599-1-peter.wang@mediatek.com Reviewed-by: Bart Van Assche bvanassche@acm.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/ufs/core/ufshcd.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 14a6a100fcdb0..4a07a18cf835d 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -3172,7 +3172,9 @@ static int ufshcd_wait_for_dev_cmd(struct ufs_hba *hba,
/* MCQ mode */ if (is_mcq_enabled(hba)) { - err = ufshcd_clear_cmd(hba, lrbp->task_tag); + /* successfully cleared the command, retry if needed */ + if (ufshcd_clear_cmd(hba, lrbp->task_tag) == 0) + err = -EAGAIN; hba->dev_cmd.complete = NULL; return err; }