Re: [PATCH v2] scsi: ufs: core: call hibern8 notify when hibern8 cmd failed

[Bart Van Assche <bvanassche@acm.org>]

On 4/29/26 4:23 AM, Hongjie Fang wrote:
> diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h
> index 8563b6648976..c1cb30d8aa4a 100644
> --- a/include/ufs/ufshcd.h
> +++ b/include/ufs/ufshcd.h
> @@ -355,7 +355,8 @@ struct ufs_hba_variant_ops {
>   				  bool is_scsi_cmd);
>   	void	(*setup_task_mgmt)(struct ufs_hba *, int, u8);
>   	void    (*hibern8_notify)(struct ufs_hba *, enum uic_cmd_dme,
> -					enum ufs_notify_change_status);
> +					enum ufs_notify_change_status,
> +					int cmd_ret);
>   	int	(*apply_dev_quirks)(struct ufs_hba *hba);
>   	void	(*fixup_dev_quirks)(struct ufs_hba *hba);
>   	int     (*suspend)(struct ufs_hba *, enum ufs_pm_op,

Passing the full 'cmd_ret' value to the hibern8_notify vendor operation 
may make the UFS driver harder to maintain than necessary.
Implementations of this vendor operation may test for specific values of
'cmd_ret'. Hence, when making any change in the code that calls
.hibern8_notify() regarding the return value, all implementations of
.hibern8_notify() would have to be reviewed.

Has it been considered to add a third value in enum 
ufs_notify_change_status, e.g. ROLLBACK_CHANGE? That should be
sufficient for hibern8_notify implementations, isn't it?

Thanks,

Bart.