Re: ipr crashes due to NULL dma_need_drain since cc97923a5bcc ("block: move dma drain handling to scsi")

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To: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Subject: Re: ipr crashes due to NULL dma_need_drain since cc97923a5bcc ("block: move dma drain handling to scsi")
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 9 Jun 2020 14:04:37 +0200
Cc: brking@xxxxxxxxxx, Christoph Hellwig <hch@xxxxxx>, Jens Axboe <axboe@xxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, LKML <linux-kernel@xxxxxxxxxxxxxxx>, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-block@xxxxxxxxxxxxxxx, linux-ide@xxxxxxxxxxxxxxx
In-reply-to: <87zh9cftj0.fsf@mpe.ellerman.id.au>
References: <87zh9cftj0.fsf@mpe.ellerman.id.au>
User-agent: Mutt/1.5.17 (2007-11-01)

On Tue, Jun 09, 2020 at 08:00:35PM +1000, Michael Ellerman wrote:
> Hi all,
> 
> I'm seeing crashes on powerpc with the ipr driver, which I'm fairly sure
> are due to dma_need_drain being NULL.

Ooops, my changes completely forgot about SAS attached ATAPI devices.
I'll cook up a fix in a bit.

References:
- ipr crashes due to NULL dma_need_drain since cc97923a5bcc ("block: move dma drain handling to scsi")
  - From: Michael Ellerman

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