linux-kernel - Re: [BUG][bisected 270065e] linux-next fails to boot on powerpc

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Message-ID: <1502904072.2421.3.camel@wdc.com>
Date:   Wed, 16 Aug 2017 17:21:14 +0000
From:   Bart Van Assche <Bart.VanAssche@....com>
To:     "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "abdhalee@...ux.vnet.ibm.com" <abdhalee@...ux.vnet.ibm.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "hch@....de" <hch@....de>,
        "brking@...ux.vnet.ibm.com" <brking@...ux.vnet.ibm.com>,
        "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>,
        "sachinp@...ux.vnet.ibm.com" <sachinp@...ux.vnet.ibm.com>,
        "linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
        "hare@...e.com" <hare@...e.com>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>
Subject: Re: [BUG][bisected 270065e] linux-next fails to boot on powerpc

On Wed, 2017-08-16 at 22:30 +0530, Abdul Haleem wrote:
> As of next-20170809, linux-next on powerpc boot hung with below trace
> message.
> 
> [ ... ]
> 
> A bisection resulted in first bad commit (270065e92 - scsi: scsi-mq:
> Always unprepare ...) in the merge branch 'scsi/for-next'
> 
> System booted fine when the below commit is reverted: 
> 
> commit 270065e92c317845d69095ec8e3d18616b5b39d5
> Author: Bart Van Assche <bart.vanassche@....com>
> Date:   Thu Aug 3 14:40:14 2017 -0700
> 
>     scsi: scsi-mq: Always unprepare before requeuing a request

Hello Brian and Michael,

Do you agree that this probably indicates a bug in the PowerPC block driver
that is used to access the boot disk? Anyway, since a solution is not yet
available, I will submit a revert for this patch.

Bart.