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SubjectRE: [PATCH] scsi: ufs: Disable autohibern8 feature in Cadence UFS
Date


> -----Original Message-----
> From: sheebab <sheebab@cadence.com>
> Sent: 03 December 2019 15:37
> To: alim.akhtar@samsung.com; avri.altman@wdc.com;
> pedrom.sousa@synopsys.com; jejb@linux.ibm.com;
> martin.petersen@oracle.com; stanley.chu@mediatek.com;
> beanhuo@micron.com; yuehaibing@huawei.com; linux-scsi@vger.kernel.org;
> linux-kernel@vger.kernel.org; vigneshr@ti.com
> Cc: mparab@cadence.com; rafalc@cadence.com; sheebab
> <sheebab@cadence.com>
> Subject: [PATCH] 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
>
> Signed-off-by: sheebab <sheebab@cadence.com>
> ---
Probably we want to mark this as FIX for the older kernel version?
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>

> drivers/scsi/ufs/cdns-pltfrm.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/scsi/ufs/cdns-pltfrm.c
b/drivers/scsi/ufs/cdns-pltfrm.c index
> b2af04c57a39..882425d1166b 100644
> --- a/drivers/scsi/ufs/cdns-pltfrm.c
> +++ b/drivers/scsi/ufs/cdns-pltfrm.c
> @@ -98,6 +98,12 @@ static int cdns_ufs_link_startup_notify(struct ufs_hba
> *hba,
> * completed.
> */
> 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;
> }
> --
> 2.17.1


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