From: Alim Akhtar Date: Thu, 28 May 2020 01:16:50 +0000 (+0530) Subject: scsi: ufs: Add quirk to disallow reset of interrupt aggregation X-Git-Tag: v5.7.18~34 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d11eae1260a032c37269e5a72ac2d514768ab99e;p=thirdparty%2Fkernel%2Fstable.git scsi: ufs: Add quirk to disallow reset of interrupt aggregation [ Upstream commit b638b5eb624bd5d0766683b6181d578f414585e9 ] 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 Signed-off-by: Seungwon Jeon Signed-off-by: Alim Akhtar Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 9e31f9569bf78..acd8fb4981142 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4889,7 +4889,8 @@ static irqreturn_t ufshcd_transfer_req_compl(struct ufs_hba *hba) * false interrupt if device completes another request after resetting * aggregation and before reading the DB. */ - if (ufshcd_is_intr_aggr_allowed(hba)) + if (ufshcd_is_intr_aggr_allowed(hba) && + !(hba->quirks & UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR)) ufshcd_reset_intr_aggr(hba); tr_doorbell = ufshcd_readl(hba, REG_UTP_TRANSFER_REQ_DOOR_BELL); diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index ceadbd548e06d..5b1acdd83d5c1 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -523,6 +523,12 @@ 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, }; enum ufshcd_caps {