Re: [PATCH 1/9] scsi: ufs: Allowing power mode change

From: Kyuho Choi
Date: Fri Feb 23 2018 - 00:10:33 EST


Hi Asutosh,

I've simple question in below.

On 2/21/18, Asutosh Das <asutoshd@xxxxxxxxxxxxxx> wrote:
> From: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
>
> Due to M-PHY issues, moving from HS to any other mode or gear or
> even Hibern8 causes some un-predicted behavior of the device.
> This patch fixes this issues.
>
> Signed-off-by: Yaniv Gardi <ygardi@xxxxxxxxxxxxxx>
> Signed-off-by: Subhash Jadavani <subhashj@xxxxxxxxxxxxxx>
> Signed-off-by: Can Guo <cang@xxxxxxxxxxxxxx>
> Signed-off-by: Asutosh Das <asutoshd@xxxxxxxxxxxxxx>
> ---
> drivers/scsi/ufs/ufshcd.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 011c336..d74d529 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -4167,9 +4167,13 @@ static int ufshcd_link_startup(struct ufs_hba *hba)
> goto out;
> } while (ret && retries--);
>
> - if (ret)
> + if (ret) {
> /* failed to get the link up... retire */
> goto out;
> + } else {
> + ufshcd_dme_set(hba, UIC_ARG_MIB(TX_LCC_ENABLE), 0);
> + ufshcd_dme_set(hba, UIC_ARG_MIB(TX_LCC_ENABLE), 1);
> + }
>

Every ufs host has same issue and affected?.

> if (link_startup_again) {
> link_startup_again = false;
> --
> Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center,
> Inc.
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux
> Foundation Collaborative Project.
>
>