linux-kernel - Re: [PATCH] scsi: sd: Update dix config everytime sd_revalidate

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Message-ID: <yq1h6zzz740.fsf@ca-mkp.ca.oracle.com>
Date:   Wed, 19 Oct 2022 20:18:03 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Xingui Yang <yangxingui@...wei.com>
Cc:     <jejb@...ux.ibm.com>, <martin.petersen@...cle.com>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linuxarm@...wei.com>, <prime.zeng@...ilicon.com>,
        <kangfenglong@...wei.com>, <john.garry@...wei.com>
Subject: Re: [PATCH] scsi: sd: Update dix config everytime
 sd_revalidate_disk is called


Xingui,

> When the host protection capabilities are 0x77 and a DIF disk is
> connected, the DIX and DIF of the disk are default enabled. Then if
> that DIF disk is reformatted as a non-DIF format, per the currently
> flow, the DIX is kept enabled which is not correct

DIX is orthogonal to DIF and a host property. DIX should not be disabled
just because the disk is no longer formatted with protection
information.

That said, your patch is probably fine. I'll take a closer look
tomorrow.

-- 
Martin K. Petersen	Oracle Linux Engineering