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

Bart Van Assche [off-list ref] writes:

On Wed, 2017-08-16 at 22:30 +0530, Abdul Haleem wrote:

quoted

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 [off-list ref]
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?

I don't know a scsi device from a block device, so I'm not much help sorry.

It seems likely it is a powerpc specific bug, as it seems no one else
has reported any problems with this commit.

Anyway, since a solution is not yet available, I will submit a revert
for this patch.

Thanks. Sorry I haven't been able to debug it further, there's about 10
things on fire right now - ie. situation normal :)

cheers