From: Jens Axboe <axboe@suse.de>
To: Derek Foreman <manmower@signalmarketing.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: CDROM_SEND_PACKET oddity
Date: Sat, 27 Sep 2003 13:47:12 +0200 [thread overview]
Message-ID: <20030927114712.GJ3416@suse.de> (raw)
In-Reply-To: <Pine.LNX.4.58.0309262131110.15317@uberdeity.signalmarketing.com>
On Fri, Sep 26 2003, Derek Foreman wrote:
> The example code from
> http://www.ussg.iu.edu/hypermail/linux/kernel/0202.0/att-0603/01-cd_poll.c
>
> Does not behave as expected on my 2.6.0-test5 system. While the command
> seems to be successfully sent - 2 of my drives report it as an invalid
> opcode - for the other 2 drives, the buffer comes back all zeros.
> (actually, the buffer's contents will remain in whatever state they're in
> before the ioctl is called)
>
> Sending the same command to those 2 drives with SG_IO results in the
> expected behaviour.
Can you try current -bk? It has some fixes for CDROM_SEND_PACKET.
However, cd_poll should be rewritten to use SG_IO. Pretty trivial
exercise.
--
Jens Axboe
next prev parent reply other threads:[~2003-09-27 11:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-27 3:33 CDROM_SEND_PACKET oddity Derek Foreman
2003-09-27 11:47 ` Jens Axboe [this message]
2003-09-27 12:27 ` Jens Axboe
2003-09-27 17:54 ` Jens Axboe
2003-09-27 18:11 ` Derek Foreman
2003-09-28 3:50 ` Derek Foreman
2003-09-28 8:51 ` Jens Axboe
2003-09-28 16:56 ` Derek Foreman
2003-09-28 18:14 ` Jens Axboe
2003-09-28 21:02 ` Derek Foreman
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