From: Can Guo cang@codeaurora.org
[ Upstream commit 637822e63b79ee8a729f7ba2645a26cf5a524ee4 ]
During ufs system suspend, leaving rpm_dev_flush_recheck_work running or pending is risky because concurrency may happen between system suspend/resume and runtime resume routine. Fix this by cancelling rpm_dev_flush_recheck_work synchronously during system suspend.
Link: https://lore.kernel.org/r/1619408921-30426-3-git-send-email-cang@codeaurora.... Fixes: 51dd905bd2f6 ("scsi: ufs: Fix WriteBooster flush during runtime suspend") Reviewed-by: Daejun Park daejun7.park@samsung.com Signed-off-by: Can Guo cang@codeaurora.org Signed-off-by: Martin K. Petersen martin.petersen@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/scsi/ufs/ufshcd.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index fed32517d7d1..4631a609b0e3 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -8978,6 +8978,8 @@ int ufshcd_system_suspend(struct ufs_hba *hba) if (!hba->is_powered) return 0;
+ cancel_delayed_work_sync(&hba->rpm_dev_flush_recheck_work); + if ((ufs_get_pm_lvl_to_dev_pwr_mode(hba->spm_lvl) == hba->curr_dev_pwr_mode) && (ufs_get_pm_lvl_to_link_pwr_state(hba->spm_lvl) ==