[PATCH 5.10 165/717] scsi: ufs: Avoid to call REQ_CLKS_OFF to CLKS_OFF

Greg Kroah-Hartman
2020-12-28T15:12:15Z

From: Jaegeuk Kim <jaegeuk@kernel.org>

[ Upstream commit fd62de114f8c9df098dcd43b5d83c5714176dd12 ]

Once UFS is gated with CLKS_OFF, it should not call REQ_CLKS_OFF
again. This can lead to hibern8_enter failure.

Link: https://lore.kernel.org/r/20201117165839.1643377-2-jaegeuk@kernel.org
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/ufs/ufshcd.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0c148fcd24deb..1ad7d6c130f5b 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1752,7 +1752,8 @@ static void __ufshcd_release(struct ufs_hba *hba)
if (hba->clk_gating.active_reqs || hba->clk_gating.is_suspended ||
hba->ufshcd_state != UFSHCD_STATE_OPERATIONAL ||
ufshcd_any_tag_in_use(hba) || hba->outstanding_tasks ||
- hba->active_uic_cmd || hba->uic_async_done)
+ hba->active_uic_cmd || hba->uic_async_done ||
+ hba->clk_gating.state == CLKS_OFF)
return;

hba->clk_gating.state = REQ_CLKS_OFF;
--
2.27.0