From: Alim Akhtar <alim.akhtar@samsung.com>
Date: Thu, 28 May 2020 06:46:50 +0530
Subject: scsi: ufs: Add quirk to disallow reset of interrupt aggregation
Git-commit: b638b5eb624bd5d0766683b6181d578f414585e9
Patch-mainline: v5.9-rc1
References: bsc#1186992

Some host controllers support interrupt aggregation but don't allow
resetting counter and timer in software.

Link: https://lore.kernel.org/r/20200528011658.71590-3-alim.akhtar@samsung.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Seungwon Jeon <essuuj@gmail.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Lee Duncan <lduncan@suse.com>
---
 drivers/scsi/ufs/ufshcd.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -517,6 +517,12 @@ enum ufshcd_quirks {
 	 * Clear handling for transfer/task request list is just opposite.
 	 */
 	UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR		= 1 << 6,
+
+	/*
+	 * This quirk needs to be enabled if host controller doesn't allow
+	 * that the interrupt aggregation timer and counter are reset by s/w.
+	 */
+	UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR		= 1 << 7,
 };
 
 /**