linux-kernel - Re: linux-next-20090225: ide-cd triggers BUG at arch/x86/mm/ioremap.c:80!

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Date:	Thu, 26 Feb 2009 16:51:30 +0100
From:	Borislav Petkov <petkovbb@...glemail.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	linux-kernel@...r.kernel.org
Subject: Re: linux-next-20090225: ide-cd triggers BUG at arch/x86/mm/ioremap.c:80!

Hi,

On Thu, Feb 26, 2009 at 3:29 PM, Bartlomiej Zolnierkiewicz
<bzolnier@...il.com> wrote:
> On Thursday 26 February 2009, Tetsuo Handa wrote:
>> 2.6.29-rc6 is OK.
>
> Could you try to narrow down the issue by bisecting linux-next?

Can you also apply the following patch and send us the output?

Thanks.

--
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 9e19aec..fca6e64 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -918,6 +918,12 @@ static ide_startstop_t
ide_cd_do_request(ide_drive_t *drive, struct request *rq,

 	ide_init_sg_cmd(&cmd,
 		blk_fs_request(rq) ? (rq->nr_sectors << 9) : rq->data_len);
+
+	blk_dump_rq_flags(rq, "mapping rq to sg");
+
+	if ((unsigned long)rq->data < PAGE_OFFSET)
+		dump_stack();
+
 	ide_map_sg(drive, &cmd);

 	return ide_issue_pc(drive, &cmd);

-- 
Regards/Gruss,
Boris
--
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