Re: [RFC PATCH v3 1/1] scsi: ufs: Enable power management for wlun

[Asutosh Das <asutoshd@codeaurora.org>]

On Fri, Feb 12 2021 at 19:25 -0800, Bart Van Assche wrote:
>On 2/11/21 11:18 AM, Asutosh Das wrote:
>> +static inline bool is_rpmb_wlun(struct scsi_device *sdev)
>> +{
>> +	return (sdev->lun == ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_RPMB_WLUN));
>> +}
>> +
>> +static inline bool is_device_wlun(struct scsi_device *sdev)
>> +{
>> +	return (sdev->lun ==
>> +		ufshcd_upiu_wlun_to_scsi_wlun(UFS_UPIU_UFS_DEVICE_WLUN));
>> +}
>
>A minor comment: checkpatch should have reported that "return is not a
>function" for the above code.
>
>>  /**
>> + * ufshcd_setup_links - associate link b/w device wlun and other luns
>> + * @sdev: pointer to SCSI device
>> + * @hba: pointer to ufs hba
>> + *
>> + * Returns void
>> + */
>
>Please leave out "Returns void".
>
>> +static int ufshcd_wl_suspend(struct device *dev)
>> +{
>> +	struct scsi_device *sdev = to_scsi_device(dev);
>> +	struct ufs_hba *hba;
>> +	int ret;
>> +	ktime_t start = ktime_get();
>> +
>> +	if (is_rpmb_wlun(sdev))
>> +		return 0;
>> +	hba = shost_priv(sdev->host);
>> +	ret = __ufshcd_wl_suspend(hba, UFS_SYSTEM_PM);
>> +	if (ret)
>> +		dev_err(&sdev->sdev_gendev, "%s failed: %d\n", __func__,  ret);
>> +
>> +	trace_ufshcd_wl_suspend(dev_name(dev), ret,
>> +		ktime_to_us(ktime_sub(ktime_get(), start)),
>> +		hba->curr_dev_pwr_mode, hba->uic_link_state);
>> +
>> +	return ret;
>> +
>> +}
>
>Please remove the blank line after the return statement.
>
>Otherwise this patch looks good to me. Hence:
>
>Reviewed-by: Bart Van Assche <bvanassche@acm.org>
>

Done.

Thanks,
-asd