2014-09-10 20:54 GMT+09:00 Dolev Raviv <draviv@xxxxxxxxxxxxxx>:
> +static void ufshcd_set_queue_depth(struct scsi_device *sdev)
> +{
> + int ret = 0;
> + u8 lun_qdepth;
> + struct ufs_hba *hba;
> +
> + hba = shost_priv(sdev->host);
> +
> + lun_qdepth = hba->nutrs;
> + ret = ufshcd_read_unit_desc_param(hba,
> + ufshcd_scsi_to_upiu_lun(sdev->lun),
> + UNIT_DESC_PARAM_LU_Q_DEPTH,
> + &lun_qdepth,
> + sizeof(lun_qdepth));
> +
> + /* Some WLUN doesn't support unit descriptor */
> + if (ret == -EOPNOTSUPP)
> + lun_qdepth = 1;
> + else if (!lun_qdepth)
> + /* eventually, we can figure out the real queue depth */
> + lun_qdepth = hba->nutrs;
> + else
> + lun_qdepth = min_t(int, lun_qdepth, hba->nutrs);
If ufshcd_read_unit_desc_param() failed and its error code was not
-EOPNOTSUPP, lun_qdepth is undefined. In such cases lun_qdepth
should be 1?
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