scsi: ufs: Disable autohibern8 feature in Cadence UFS

This patch disables autohibern8 feature in Cadence UFS.  The autohibern8
feature has issues due to which unexpected interrupt trigger is happening.
After the interrupt issue is sorted out, autohibern8 feature will be
re-enabled

Link: https://lore.kernel.org/r/1575367635-22662-1-git-send-email-sheebab@cadence.com
Cc: <stable@vger.kernel.org>
Signed-off-by: sheebab <sheebab@cadence.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/ufs/cdns-pltfrm.c b/drivers/scsi/ufs/cdns-pltfrm.c
index b2af04c..6feeb0f 100644 (file)
--- a/drivers/scsi/ufs/cdns-pltfrm.c
+++ b/drivers/scsi/ufs/cdns-pltfrm.c
@@ -99,6 +99,12 @@ static int cdns_ufs_link_startup_notify(struct ufs_hba *hba,
         */
        ufshcd_dme_set(hba, UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), 0);
 
+       /*
+        * Disabling Autohibern8 feature in cadence UFS
+        * to mask unexpected interrupt trigger.
+        */
+       hba->ahit = 0;
+
        return 0;
 }