linux-kernel - Re: [PATCH 09/10] scsi: ufs: return value of pwr_change

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Date:	Wed, 26 Aug 2015 11:55:54 +0530
From:	amit daniel kachhap <amit.daniel@...sung.com>
To:	Alim Akhtar <alim.akhtar@...sung.com>
Cc:	linux-scsi@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	vinholikatti@...il.com, JBottomley@...n.com,
	Seungwon Jeon <tgih.jun@...sung.com>
Subject: Re: [PATCH 09/10] scsi: ufs: return value of pwr_change_notify

On Fri, Aug 21, 2015 at 2:58 PM, Alim Akhtar <alim.akhtar@...sung.com> wrote:
> From: Seungwon Jeon <tgih.jun@...sung.com>
>
> Behavior of the "powwer mode change" contains vendor specific
s/powwer/power
> operation known as pwr_change_notify. This change adds return
> for pwr_change_notify to find success or failure.
>
> Signed-off-by: Seungwon Jeon <tgih.jun@...sung.com>
> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
> ---
>  drivers/scsi/ufs/ufshcd.c |   22 +++++++++++++++-------
>  1 file changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
> index 8982da9..142a927 100644
> --- a/drivers/scsi/ufs/ufshcd.c
> +++ b/drivers/scsi/ufs/ufshcd.c
> @@ -2579,14 +2579,18 @@ static int ufshcd_change_power_mode(struct ufs_hba *hba,
>                 dev_err(hba->dev,
>                         "%s: power mode change failed %d\n", __func__, ret);
>         } else {
> -               if (hba->vops && hba->vops->pwr_change_notify)
> -                       hba->vops->pwr_change_notify(hba,
> -                               POST_CHANGE, NULL, pwr_mode);
> +               if (hba->vops && hba->vops->pwr_change_notify) {
> +                       ret = hba->vops->pwr_change_notify(hba,
> +                                       POST_CHANGE, NULL, pwr_mode);
> +                       if (ret)
> +                               goto out;
> +               }
>
>                 memcpy(&hba->pwr_info, pwr_mode,
>                         sizeof(struct ufs_pa_layer_attr));
>         }
>
> +out:
>         return ret;
>  }
>
> @@ -2601,14 +2605,18 @@ int ufshcd_config_pwr_mode(struct ufs_hba *hba,
>         struct ufs_pa_layer_attr final_params = { 0 };
>         int ret;
>
> -       if (hba->vops && hba->vops->pwr_change_notify)
> -               hba->vops->pwr_change_notify(hba,
> -                    PRE_CHANGE, desired_pwr_mode, &final_params);
> -       else
> +       if (hba->vops && hba->vops->pwr_change_notify) {
> +               ret = hba->vops->pwr_change_notify(hba,
> +                       PRE_CHANGE, desired_pwr_mode, &final_params);
> +               if (ret)
> +                       goto out;
> +       } else {
>                 memcpy(&final_params, desired_pwr_mode, sizeof(final_params));
> +       }
>
>         ret = ufshcd_change_power_mode(hba, &final_params);
>
> +out:
>         return ret;
>  }
>  EXPORT_SYMBOL_GPL(ufshcd_config_pwr_mode);
> --
> 1.7.10.4
>
> --
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