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Subject: Re: [RFC PATCH 04/13] scsi: ufs: ufshpb: Init part II - Attach scsi
 device
To:     Avri Altman <avri.altman@wdc.com>,
        "James E . J . Bottomley" <jejb@linux.vnet.ibm.com>,
        "Martin K . Petersen" <martin.petersen@oracle.com>,
        linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     alim.akhtar@samsung.com, asutoshd@codeaurora.org,
        Zang Leigang <zangleigang@hisilicon.com>,
        Avi Shchislowski <avi.shchislowski@wdc.com>,
        Bean Huo <beanhuo@micron.com>, cang@codeaurora.org,
        stanley.chu@mediatek.com,
        MOHAMMED RAFIQ KAMAL BASHA <md.rafiq@samsung.com>,
        Sang-yoon Oh <sangyoon.oh@samsung.com>,
        yongmyung lee <ymhungry.lee@samsung.com>,
        Jinyoung CHOI <j-young.choi@samsung.com>
References: <1589538614-24048-1-git-send-email-avri.altman@wdc.com>
 <1589538614-24048-5-git-send-email-avri.altman@wdc.com>
From:   Bart Van Assche <bvanassche@acm.org>
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Message-ID: <52b5a1c6-38fd-7231-f6c9-b560c3ca9372@acm.org>
Date:   Fri, 15 May 2020 18:52:00 -0700
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On 2020-05-15 03:30, Avri Altman wrote:
> @@ -4628,6 +4628,9 @@ static int ufshcd_slave_alloc(struct scsi_device *sdev)
>  
>  	ufshcd_get_lu_power_on_wp_status(hba, sdev);
>  
> +	if (ufshcd_is_hpb_supported(hba))
> +		ufshpb_attach_sdev(hba, sdev);
> +
>  	return 0;
>  }

This approach is unusual because:
- Direct calls from the ufshcd module into the ufshpb module make it
  impossible to unload the latter kernel module.
- No other SCSI LLD calls directly into a device handler.

Thanks,

Bart.