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Subject: Re: [PATCH 3/3] scsi: ufs: use UFS device indicated maximum LU number
To:     Bean Huo <huobean@gmail.com>, alim.akhtar@samsung.com,
        avri.altman@wdc.com, pedrom.sousa@synopsys.com, jejb@linux.ibm.com,
        martin.petersen@oracle.com, stanley.chu@mediatek.com,
        beanhuo@micron.com, tomas.winkler@intel.com, cang@codeaurora.org
Cc:     linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
References: <20200110183606.10102-1-huobean@gmail.com>
 <20200110183606.10102-4-huobean@gmail.com>
From:   Bart Van Assche <bvanassche@acm.org>
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Message-ID: <9f26bde7-0c78-c56c-4f15-5bf2dba71506@acm.org>
Date:   Sat, 11 Jan 2020 14:50:17 -0800
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On 2020-01-10 10:36, Bean Huo wrote:
> @@ -548,12 +547,19 @@ struct ufs_dev_desc {
>  
>  /**
>   * ufs_is_valid_unit_desc_lun - checks if the given LUN has a unit descriptor
> + * @dev_info: pointer of instance of struct ufs_dev_info
>   * @lun: LU number to check
>   * @return: true if the lun has a matching unit descriptor, false otherwise
>   */
> -static inline bool ufs_is_valid_unit_desc_lun(u8 lun)
> +static inline bool ufs_is_valid_unit_desc_lun(struct ufs_dev_info *dev_info,
> +		u8 lun)
>  {

Can the dev_info be declared 'const' (const truct ufs_dev_info *dev_info)?

> -	return lun == UFS_UPIU_RPMB_WLUN || (lun < UFS_UPIU_MAX_GENERAL_LUN);
> +	if (!dev_info || !dev_info->max_lu_supported) {
> +		pr_err("Max General LU supported by UFS isn't initilized\n");
                                                              ^^^^^^^^^^
                                                            initialized?
> +		return false;
> +	}
> +
> +	return lun == UFS_UPIU_RPMB_WLUN || (lun < dev_info->max_lu_supported);
>  }

Are the parentheses in the above expression necessary?

Thanks,

Bart.