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Bottomley" , "Martin K. Petersen" , Peter Wang , Bean Huo , Adrian Hunter , "Bao D. Nguyen" , "open list:UNIVERSAL FLASH STORAGE HOST CONTROLLER DRIVER" , open list Content-Type: text/plain; charset="UTF-8" Ensure that the exception event handling work is explicitly flushed during suspend when the runtime power management level is set to UFS_PM_LVL_0. When the RPM level is zero, the device power mode and link state both remain active. Previously, the UFS core driver bypassed flushing exception event handling jobs in this configuration. This created a race condition where the driver could attempt to access the host controller to handle an exception after the system had already entered a deep power-down state, resulting in a system crash. Explicitly flush this work and disable auto BKOPs before the suspend callback proceeds. This guarantees that pending exception tasks complete and prevents illegal hardware access during the power-down sequence. Signed-off-by: Thomas Yen Cc: Stable Tree --- v3: - Add logic to disable BKOPs. v2: - Add Cc: stable tag. - Reformat commit message text for better line wrapping. --- drivers/ufs/core/ufshcd.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index 0369043ca010..8c88dd5c2cca 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -9997,6 +9997,8 @@ static int __ufshcd_wl_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op) if (req_dev_pwr_mode == UFS_ACTIVE_PWR_MODE && req_link_state == UIC_LINK_ACTIVE_STATE) { + ufshcd_disable_auto_bkops(hba); + flush_work(&hba->eeh_work); goto vops_suspend; } base-commit: a48ca06cf343423faa01c573aeafba9fa5f92577 -- 2.53.0.rc1.225.gd81095ad13-goog