scsi: ufs: fix Auto-Hibern8 error detection
Auto-Hibern8 may be disabled by some vendors or sysfs in runtime even if
Auto-Hibern8 capability is supported by host. If Auto-Hibern8 capability is
supported by host but not actually enabled, Auto-Hibern8 error shall not
happen.
To fix this, provide a way to detect if Auto-Hibern8 is actually enabled
first, and bypass Auto-Hibern8 disabling case in
ufshcd_is_auto_hibern8_error().
Fixes: 821744403913 ("scsi: ufs: Add error-handling of Auto-Hibernate")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200129105251.12466-4-stanley.chu@mediatek.com
Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Asutosh Das <asutoshd@codeaurora.org>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index abd0e6b..214a3f3 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5479,7 +5479,8 @@ static irqreturn_t ufshcd_update_uic_error(struct ufs_hba *hba)
static bool ufshcd_is_auto_hibern8_error(struct ufs_hba *hba,
u32 intr_mask)
{
- if (!ufshcd_is_auto_hibern8_supported(hba))
+ if (!ufshcd_is_auto_hibern8_supported(hba) ||
+ !ufshcd_is_auto_hibern8_enabled(hba))
return false;
if (!(intr_mask & UFSHCD_UIC_HIBERN8_MASK))