From f8ef441811ec413717f188f63d99182f30f0f08e Mon Sep 17 00:00:00 2001 From: Thomas Yen Date: Fri, 30 Jan 2026 00:51:51 +0800 Subject: [PATCH] scsi: ufs: core: Flush exception handling work when RPM level is zero 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. Fixes: 57d104c153d3 ("ufs: add UFS power management support") Signed-off-by: Thomas Yen Cc: Stable Tree Reviewed-by: Peter Wang Reviewed-by: Bart Van Assche Link: https://patch.msgid.link/20260129165156.956601-1-thomasyen@google.com Signed-off-by: Martin K. Petersen --- 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 66223d2908532..8349fe2090db6 100644 --- a/drivers/ufs/core/ufshcd.c +++ b/drivers/ufs/core/ufshcd.c @@ -9998,6 +9998,8 @@ 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; } -- 2.47.3