linux-kernel - Re: [PATCH]: Fix old SCSI adapter crashes with CD-ROM (take 2)

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Date:	Tue, 8 May 2007 18:53:59 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	James Bottomley <James.Bottomley@...elEye.com>
Cc:	Jens Axboe <jens.axboe@...cle.com>, linux-scsi@...r.kernel.org,
	akpm@...l.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]: Fix old SCSI adapter crashes with CD-ROM (take 2)

> > Long answer - it doesn't take this path.
> > 
> > Different bug, both want fixing I suspect.
> 
> Actually, it does take this path ... one of the things we've been doing
> in SCSI is slowly eliminating the old direct submission paths in favour
> of sending everything through the correct block layer paths.
> scsi_execute(), which the sr ioctl uses is just such a fixed path ...
> the bug is that it should be bouncing the request but because of an
> oversight (which Mike's patch corrects) it doesn't.

Well if Mike's patch is going in and it fixes this then I'll be more than
happy to withdraw the pending one.

> 
> The ultimate goal is to be able to eliminate the unchecked_isa_dma flag
> entirely and have the block layer (or device mask allocations) fix all
> of this in every ULD.

About time ;)


Alan
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