linux-kernel - Re: [RFC PATCH 02/13] scsi: ufshpb: Init part I

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Date:   Fri, 15 May 2020 18:57:03 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Avri Altman <avri.altman@....com>,
        "James E . J . Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     alim.akhtar@...sung.com, asutoshd@...eaurora.org,
        Zang Leigang <zangleigang@...ilicon.com>,
        Avi Shchislowski <avi.shchislowski@....com>,
        Bean Huo <beanhuo@...ron.com>, cang@...eaurora.org,
        stanley.chu@...iatek.com,
        MOHAMMED RAFIQ KAMAL BASHA <md.rafiq@...sung.com>,
        Sang-yoon Oh <sangyoon.oh@...sung.com>,
        yongmyung lee <ymhungry.lee@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>
Subject: Re: [RFC PATCH 02/13] scsi: ufshpb: Init part I - Read HPB config

On 2020-05-15 03:30, Avri Altman wrote:
> +struct ufshpb_lun_config *ufshpb_luns_conf;
> +struct ufshpb_lun *ufshpb_luns;
> +static unsigned long ufshpb_lun_map[BITS_TO_LONGS(UFSHPB_MAX_LUNS)];
> +static u8 ufshpb_lun_lookup[UFSHPB_MAX_LUNS];
> +
> +/**
> + * ufshpb_remove - ufshpb cleanup
> + *
> + * Should be called when unloading the driver.
> + */
> +void ufshpb_remove(struct ufs_hba *hba)
> +{
> +	kfree(ufshpb_conf);
> +	kfree(ufshpb_luns_conf);
> +	kfree(ufshpb_luns);
> +	ufshcd_query_flag(hba, UPIU_QUERY_OPCODE_SET_FLAG,
> +			  QUERY_FLAG_IDN_HPB_RESET, 0, NULL);
> +}
> +
> +static int ufshpb_hpb_init(void)
> +{
> +	u8 num_hpb_luns = ufshpb_conf->num_hpb_luns;
> +	int i;
> +
> +	ufshpb_luns = kcalloc(num_hpb_luns, sizeof(*ufshpb_luns), GFP_KERNEL);
> +	if (!ufshpb_luns)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < num_hpb_luns; i++) {
> +		struct ufshpb_lun *hpb = ufshpb_luns + i;
> +
> +		hpb->lun = (ufshpb_luns_conf + i)->lun;
> +	}
> +
> +	return 0;
> +}

Do the ufshpb_lun... data structures perhaps duplicate SCSI core data
structures? If so, please don't introduce duplicates of SCSI core data
structures.

Thanks,

Bart.