linux-kernel - Re: 2.6.25-rc1/2 CD/DVD burning broken

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Message-ID: <jek5kvisih.fsf@sykes.suse.de>
Date:	Sat, 23 Feb 2008 16:47:50 +0100
From:	Andreas Schwab <schwab@...e.de>
To:	Kiyoshi Ueda <k-ueda@...jp.nec.com>
Cc:	bzolnier@...il.com, linux-kernel@...r.kernel.org,
	jens.axboe@...cle.com, petkovbb@...il.com, j-nomura@...jp.nec.com
Subject: Re: 2.6.25-rc1/2 CD/DVD burning broken

Kiyoshi Ueda <k-ueda@...jp.nec.com> writes:

> Could you try this patch?
> I've only done a compile test, so this patch may not work.

Unfortunately, that is not enough to get DVD burning working again.
This is the error that growisofs is getting:

ioctl(6, SG_IO, {'S', SG_DXFER_TO_DEV, cmd[10]=[2a, 00, 00, 00, 03, 10, 00, 00, 10, 00], mx_sb_len=64, iovec_count=0, dxfer_len=32768, timeout=60000, flags=0x3, data[32768]=["\360R\360\314Wt\277\241\36.\347\356L$\201]\210\372_~]I\213\366\253SV\2\372\356\312\257"...], status=02, masked_status=01, sb[0]=[], host_status=0, driver_status=0, resid=32768, duration=0, info=0x1}) = 0
write(2, ":-( unable to WRITE@...=310h: ", 30) = 30

It looks like the sense buffer is not filled in.  In a successfully run
of growisfs under 2.6.24.2 the sense code is "LONG WRITE IN PROGRESS".

I also see that resid always equals dxfer_len even when the transfer was
successful, although growisofs does not seem to care.  With 2.6.24.2
resid is only non-zero when a sense error occurred.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@...e.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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