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| author | Alim Akhtar <alim.akhtar@samsung.com> | 2020-05-28 06:46:50 +0530 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2020-06-15 14:04:07 -0400 |
| commit | b638b5eb624bd5d0766683b6181d578f414585e9 (patch) | |
| tree | 85bd038fd7b7fbf4003618ccbc632554f0a5dc71 /drivers/scsi/ufs | |
| parent | 871838412adf533ffda0b4a0ede0c2984e3511e7 (diff) | |
| download | linux-stable-b638b5eb624bd5d0766683b6181d578f414585e9.tar.gz linux-stable-b638b5eb624bd5d0766683b6181d578f414585e9.tar.bz2 linux-stable-b638b5eb624bd5d0766683b6181d578f414585e9.zip | |
scsi: ufs: Add quirk to disallow reset of interrupt aggregation
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>
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 3 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.h | 6 |
2 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 97d86f774ef1..d14b85b0403d 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -4909,7 +4909,8 @@ 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 ff0521a08365..354c82bff93c 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -525,6 +525,12 @@ 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 { |