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

["Alim Akhtar" <alim.akhtar@samsung.com>]

> -----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