linux-kernel - Re: [RFC PATCH 03/13] scsi: scsi_dh: Introduce scsi_dh

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Message-ID: <80b0ffae-7af4-6d06-77e7-a8a97aaa9a05@acm.org>
Date:   Fri, 15 May 2020 18:48:58 -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 03/13] scsi: scsi_dh: Introduce scsi_dh_ufshpb

On 2020-05-15 03:30, Avri Altman wrote:
> +static int ufshpb_attach(struct scsi_device *sdev)
> +{
> +	struct ufshpb_dh_data *h;
> +
> +	h = kzalloc(sizeof(*h), GFP_KERNEL);
> +	if (!h)
> +		return SCSI_DH_NOMEM;
> +
> +	sdev_printk(KERN_INFO, sdev, "%s: attached to sdev (lun) %llu\n",
> +		    UFSHPB_NAME, sdev->lun);
> +
> +	sdev->handler_data = h;
> +
> +	return SCSI_DH_OK;
> +}

I think that all other SCSI device handlers check in their .attach
function whether the @sdev SCSI device is supported by the device
handler. I don't see any such check in the above function?

Bart.