Messages in this thread | | | Date | Wed, 16 May 2018 14:24:24 -0700 | From | Subhash Jadavani <> | Subject | Re: [PATCH 2/4] scsi: ufs: add quirk not to allow reset of interrupt aggregation |
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On 2018-05-06 03:14, Alim Akhtar wrote: > Some host controller supports interrupt aggregation, but doesn't > allow to reset counter and timer by s/w. > > Signed-off-by: Seungwon Jeon <essuuj@gmail.com> > Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> > --- > drivers/scsi/ufs/ufshcd.c | 3 ++- > drivers/scsi/ufs/ufshcd.h | 6 ++++++ > 2 files changed, 8 insertions(+), 1 deletion(-) > > diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c > index 9898ce5..253257c 100644 > --- a/drivers/scsi/ufs/ufshcd.c > +++ b/drivers/scsi/ufs/ufshcd.c > @@ -4695,7 +4695,8 @@ static void 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 43035f8..5c91ff1 100644 > --- a/drivers/scsi/ufs/ufshcd.h > +++ b/drivers/scsi/ufs/ufshcd.h > @@ -600,6 +600,12 @@ struct ufs_hba { > */ > #define UFSHCI_QUIRK_BROKEN_REQ_LIST_CLR 0x100 > > + /* > + * This quirk needs to be enabled if host controller doesn't allow > + * that the interrupt aggregation timer and counter are reset by s/w. > + */ > + #define UFSHCI_QUIRK_SKIP_RESET_INTR_AGGR 0x200 > + > unsigned int quirks; /* Deviations from standard UFSHCI spec. */ > > /* Device deviations from standard UFS device spec. */
Looks good to me. Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
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