linux-kernel - Re: 2.6.19-rc5: known regressions

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Message-ID: <8764dp39de.fsf@sycorax.lbl.gov>
Date:	Wed, 08 Nov 2006 13:40:29 -0800
From:	Alex Romosan <romosan@...orax.lbl.gov>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.19-rc5: known regressions

Jens Axboe <jens.axboe@...cle.com> writes:

> If you could retest with something crazy like this, then that would
> likely help:
>
> diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
> index 7c47e62..010acfa 100644
> --- a/drivers/ide/ide-cd.c
> +++ b/drivers/ide/ide-cd.c
> @@ -630,6 +630,9 @@ static void cdrom_end_request (ide_drive
>  	struct request *rq = HWGROUP(drive)->rq;
>  	int nsectors = rq->hard_cur_sectors;
>  
> +	if (blk_pc_request(rq) && rq->cmd[0] == 0x12)
> +		printk("ide-cd: end INQ rq %p\n", rq);
> +
>  	if (blk_sense_request(rq) && uptodate) {
>  		/*
>  		 * For REQ_TYPE_SENSE, "rq->buffer" points to the original
> @@ -1671,6 +1674,9 @@ static ide_startstop_t cdrom_newpc_intr(
>  	xfer_func_t *xferfunc;
>  	unsigned long flags;
>  
> +	if (rq->cmd[0] == 0x12)
> +		printk("ide-cd: newpc %p\n", rq);
> +
>  	/* Check for errors. */
>  	dma_error = 0;
>  	dma = info->dma;
> @@ -1789,6 +1795,8 @@ static ide_startstop_t cdrom_newpc_intr(
>  	return ide_started;
>  
>  end_request:
> +	if (rq->cmd[0] == 0x12)
> +		printk("ide-cd: newpc end INQ %p\n", rq);
>  	if (!rq->data_len)
>  		post_transform_command(rq);
>  
> @@ -1959,7 +1967,13 @@ static ide_startstop_t cdrom_do_block_pc
>  {
>  	struct cdrom_info *info = drive->driver_data;
>  
> -	rq->cmd_flags |= REQ_QUIET;
> +	if (rq->cmd[0] == 0x12) {
> +		printk("ide-cd: starting INQ %p\n", rq);
> +		if (rq_data_dir(rq) == WRITE)
> +			printk("ide-cd: INQ with write set seen\n");
> +	}
> +	if (!rq->bio && rq->biotail)
> +		printk("ide-cd: no bio, but biotail\n");
>  
>  	info->dma = 0;

i applied this patch on top of the old one. this is what i get now:

kernel: ide-cd: starting INQ df5ad074
kernel: ide-cd: INQ with write set seen
kernel: ide-cd: newpc df5ad074
kernel: hdc: write_intr: wrong transfer direction!
kernel: ide-cd: end INQ rq df5ad074
kernel: cdrom_newpc: dev hdc: type=2, flags=104c9
kernel: 
kernel: sector 59534648, nr/cnr 0/0
kernel: bio 00000000, biotail dee57c80, buffer 00000000, data 00000000, len 56
kernel: cdb: 12 00 00 00 38 00 00 00 00 00 00 00 00 00 00 00 
kernel: ide-cd: starting INQ df5ad074
kernel: ide-cd: newpc df5ad074
kernel: ide-cd: newpc df5ad074
kernel: ide-cd: newpc end INQ df5ad074
kernel: hdc: packet command error: status=0x51 { DriveReady SeekComplete Error }
kernel: hdc: packet command error: error=0xb4 { AbortedCommand LastFailedSense=0x0b }
kernel: ide: failed opcode was: unknown
kernel: ATAPI device hdc:
kernel:   Error: Aborted command -- (Sense key=0x0b)
kernel:   (reserved error code) -- (asc=0x11, ascq=0x11)
kernel:   The failed "Read CD" packet command was: 
kernel:   "be 00 00 00 51 93 00 00 0d f8 00 00 00 00 00 00 "
kernel: hdc: packet command error: status=0x51 { DriveReady SeekComplete Error }
kernel: hdc: packet command error: error=0x30 { LastFailedSense=0x03 }
kernel: ide: failed opcode was: unknown
kernel: ATAPI device hdc:
kernel:   Error: Medium error -- (Sense key=0x03)
kernel:   Unrecovered read error -- (asc=0x11, ascq=0x00)
kernel:   The failed "Read CD" packet command was: 
kernel:   "be 00 00 00 51 a0 00 00 07 f8 00 00 00 00 00 00 "
kernel: hdc: packet command error: status=0x51 { DriveReady SeekComplete Error }
kernel: hdc: packet command error: error=0xb4 { AbortedCommand LastFailedSense=0x0b }
kernel: ide: failed opcode was: unknown
kernel: ATAPI device hdc:
kernel:   Error: Aborted command -- (Sense key=0x0b)
kernel:   (reserved error code) -- (asc=0x11, ascq=0x11)
kernel:   The failed "Read CD" packet command was: 
kernel:   "be 00 00 00 51 9b 00 00 0d f8 00 00 00 00 00 00 "

hdc is the cdrom drive and the errors started showing up when
cdparanoia hung.

--alex--

-- 
| I believe the moment is at hand when, by a paranoiac and active |
|  advance of the mind, it will be possible (simultaneously with  |
|  automatism and other passive states) to systematize confusion  |
|  and thus to help to discredit completely the world of reality. |
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