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From: Stefan Richter <stefanr@s5r6.in-berlin.de>
To: Christoph Hellwig <hch@infradead.org>
Cc: Kristian H?gsberg <krh@redhat.com>,
	linux1394-devel <linux1394-devel@lists.sourceforge.net>,
	linux-scsi@vger.kernel.org
Subject: Re: use_sg != 0 assumption (was Re: [PATCH 5/9] Drop single buffer request support.)
Date: Thu, 10 May 2007 15:09:55 +0200	[thread overview]
Message-ID: <464319A3.3070905@s5r6.in-berlin.de> (raw)
In-Reply-To: <20070510114411.GA17971@infradead.org>

Christoph Hellwig wrote:
> On Thu, May 10, 2007 at 12:38:31PM +0200, Stefan Richter wrote:
>> Would a BUG_ON(cmd->use_sg == 0); be in order?
> 
> I don't think we should put this into every driver.  If you want to
> be sure this doesn't happen anymore put it just in front of the queuecommand
> call.

Thanks for the pointer.  I'm just noticing that Jens Axboe has a patch
which puts BUG_ON(!cmd->use_sg); into scsi_lib.c's sg table allocation
path.  (The "Chaining sg lists for bio IO commands v3" patchset from a
few hours ago, part 11/13 "SCSI: support for allocating large
scatterlists".)
-- 
Stefan Richter
-=====-=-=== -=-= -=-=-
http://arcgraph.de/sr/

  reply	other threads:[~2007-05-10 13:10 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <11787529952207-git-send-email-krh@redhat.com>
     [not found] ` <11787530023454-git-send-email-krh@redhat.com>
     [not found]   ` <11787530031570-git-send-email-krh@redhat.com>
     [not found]     ` <11787530031450-git-send-email-krh@redhat.com>
     [not found]       ` <11787530043878-git-send-email-krh@redhat.com>
2007-05-10 10:38         ` use_sg != 0 assumption (was Re: [PATCH 5/9] Drop single buffer request support.) Stefan Richter
2007-05-10 11:44           ` Christoph Hellwig
2007-05-10 13:09             ` Stefan Richter [this message]
2007-05-10 13:08           ` Kristian Høgsberg
     [not found]         ` <11787530054176-git-send-email-krh@redhat.com>
2007-05-10 10:44           ` [PATCH 6/9] Make scsi_host_template::proc_name const char * instead of char * Stefan Richter

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