From: Alan Chandler <alan@chandlerfamily.org.uk>
To: Jens Axboe <axboe@suse.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: ide-cd problem
Date: Sun, 21 Nov 2004 10:25:11 +0000 [thread overview]
Message-ID: <200411211025.11629.alan@chandlerfamily.org.uk> (raw)
In-Reply-To: <20041121085636.GG26240@suse.de>
On Sunday 21 November 2004 08:56, Jens Axboe wrote:
> On Sun, Nov 21 2004, Alan Chandler wrote:
...
> > Nov 21 00:44:20 kanger kernel: sg_io command length 6
> > Nov 21 00:44:20 kanger kernel: sg_io command [0] = 0x1b
> > Nov 21 00:44:20 kanger kernel: sg_io command [1] = 0x0
> > Nov 21 00:44:20 kanger kernel: sg_io command [2] = 0x0
> > Nov 21 00:44:20 kanger kernel: sg_io command [3] = 0x0
> > Nov 21 00:44:20 kanger kernel: sg_io command [4] = 0x3
> > Nov 21 00:44:20 kanger kernel: sg_io command [5] = 0x0
> > Nov 21 00:44:20 kanger kernel: sg_io dxfer_len = 0
> > Nov 21 00:45:00 kanger kernel: hdc: lost interrupt
> > Nov 21 00:45:40 kanger kernel: hdc: lost interrupt
> > Nov 21 00:47:00 kanger last message repeated 2 times
> > Nov 21 00:47:40 kanger kernel: hdc: lost interrupt
>
> So the last request is a START_STOP unit, which doesn't transfer any
> data. If the drive has DRQ_STAT stat set here, it looks very odd. Any
> chance you could instrument cdrom_newpc_intr() as well to dump status
> bytes and expected transfer lengths from the drive?
As below - note I have also got a printk in cdrom_timer_expiry () - but
nothing there. I have included a couple of commands before the key one, and
also a few 'lost interrupt' calls after the lock to show how it then doesn't
recover. (and I made a spelling error in one of the messages the message -
seld should mean self).
Nov 21 10:13:44 kanger kernel: scsi_cmd_ioctl - cmd = 0x2285
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io cmd [0] = 0x3c
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io dxfer_len = 64512
Nov 21 10:13:44 kanger kernel: scsi_ioctl: about to execute cmd 0x3c
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_do_block_pc
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_start_packet_command - xferlen =
64512 - dma = 1
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (before decode status)
- dma = 1 dma_error = 0x0
Nov 21 10:13:44 kanger kernel: scsi_ioctl: completed command with status 0x0
Nov 21 10:13:44 kanger kernel: scsi_cmd_ioctl - cmd = 0x2285
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io cmd [0] = 0x3c
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io dxfer_len = 64512
Nov 21 10:13:44 kanger kernel: scsi_ioctl: about to execute cmd 0x3c
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_do_block_pc
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_start_packet_command - xferlen =
64512 - dma = 1
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (before decode status)
- dma = 1 dma_error = 0x0
Nov 21 10:13:44 kanger kernel: scsi_ioctl: completed command with status 0x0
Nov 21 10:13:44 kanger kernel: scsi_cmd_ioctl - cmd = 0x2285
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io cmd [0] = 0x0
Nov 21 10:13:44 kanger kernel: scsi_ioctl: sg_io dxfer_len = 0
Nov 21 10:13:44 kanger kernel: scsi_ioctl: about to execute cmd 0x0
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_do_block_pc
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_start_packet_command - xferlen = 0
- dma = 0
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (before decode status)
- dma = 0 dma_error = 0x0
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (in pio after reading
registers) ireason = 2 len = 0 stat = 0x58
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (DRQ not clear) - rq
cmd[0] = 0x0 rq len = 0
Nov 21 10:13:44 kanger kernel: ide-cd:cdrom_newpc_intr (about to call
ide_set_handler with seld as rentry) timeout = 40000
Nov 21 10:14:24 kanger kernel: hdc: lost interrupt
Nov 21 10:14:24 kanger kernel: ide-cd:cdrom_newpc_intr (before decode status)
- dma = 0 dma_error = 0x0
Nov 21 10:14:24 kanger kernel: ide-cd:cdrom_newpc_intr (in pio after reading
registers) ireason = 2 len = 0 stat = 0x58
Nov 21 10:14:24 kanger kernel: ide-cd:cdrom_newpc_intr (DRQ not clear) - rq
cmd[0] = 0x0 rq len = 0
Nov 21 10:14:24 kanger kernel: ide-cd:cdrom_newpc_intr (about to call
ide_set_handler with seld as rentry) timeout = 40000
Nov 21 10:15:04 kanger kernel: hdc: lost interrupt
Nov 21 10:15:04 kanger kernel: ide-cd:cdrom_newpc_intr (before decode status)
- dma = 0 dma_error = 0x0
Nov 21 10:15:04 kanger kernel: ide-cd:cdrom_newpc_intr (in pio after reading
registers) ireason = 2 len = 0 stat = 0x58
Nov 21 10:15:04 kanger kernel: ide-cd:cdrom_newpc_intr (DRQ not clear) - rq
cmd[0] = 0x0 rq len = 0
Nov 21 10:15:04 kanger kernel: ide-cd:cdrom_newpc_intr (about to call
ide_set_handler with seld as rentry) timeout = 40000
--
Alan Chandler
alan@chandlerfamily.org.uk
First they ignore you, then they laugh at you,
then they fight you, then you win. --Gandhi
next prev parent reply other threads:[~2004-11-21 10:25 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-20 18:42 ide-cd problem Alan Chandler
2004-11-20 19:47 ` Jens Axboe
2004-11-21 0:53 ` Alan Chandler
2004-11-21 8:56 ` Jens Axboe
2004-11-21 10:25 ` Alan Chandler [this message]
2004-11-21 16:13 ` Alan Chandler
2004-11-22 7:52 ` Alan Chandler
2004-11-22 8:01 ` Jens Axboe
2004-11-22 10:30 ` Alan Chandler
2004-11-22 10:51 ` Jens Axboe
2004-11-22 11:29 ` Alan Chandler
2004-11-22 11:31 ` Jens Axboe
2004-11-22 12:53 ` Alan Chandler
2004-11-22 13:02 ` Jens Axboe
2004-11-22 19:19 ` Alan Chandler
2004-11-22 23:48 ` Alan Chandler
2004-11-23 7:13 ` Alan Chandler
2004-11-23 14:51 ` Jens Axboe
2004-11-23 21:49 ` Alan Chandler
2004-11-26 23:39 ` Alan Chandler
2004-11-29 17:29 ` Bill Davidsen
2004-11-30 8:59 ` Alan Chandler
2004-12-10 21:32 ` ide-cd problem revisited - more brainpower needed Alan Chandler
2004-12-10 23:14 ` Alan Cox
2004-12-12 0:17 ` Alan Chandler
2004-12-12 11:39 ` Alan Cox
2004-12-12 13:34 ` Alan Chandler
2004-12-14 0:20 ` Alan Chandler
2004-12-16 15:56 ` Bill Davidsen
2004-12-17 23:59 ` Alan Chandler
2004-11-24 23:19 ` ide-cd problem Alan Cox
2004-11-25 15:29 ` Jens Axboe
2004-11-25 16:25 ` Alan Cox
2004-11-25 18:12 ` Jens Axboe
2004-11-25 18:45 ` Alan Chandler
2004-11-23 18:34 ` Jeff Garzik
2004-11-23 19:13 ` Jens Axboe
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