linux-kernel - Re: [PATCH] libata and starting/stopping ATAPI floppy devices

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Date:	Thu, 10 Jan 2008 18:42:15 +0100
From:	Ondrej Zary <linux@...nbow-software.org>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Tejun Heo <htejun@...il.com>, jgarzik@...ox.com,
	linux-ide@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libata and starting/stopping ATAPI floppy devices

On Thursday 10 January 2008 02:05:23 Robert Hancock wrote:
> Tejun Heo wrote:
> > From: Ondrej Zary <linux@...nbow-software.org>
> >
> > Prevent libata from starting/stopping non-ATA devices (like ATAPI floppy
> > drives) as they don't seem to like it:
> >
> > sd 1:0:1:0: [sdb] Starting disk
> > ata2.01: configured for PIO2
> > sd 1:0:1:0: [sdb] Result: hostbyte=0x00 driverbyte=0x08
> > sd 1:0:1:0: [sdb] Sense Key : 0x2 [current]
> > sd 1:0:1:0: [sdb] ASC=0x3a ASCQ=0x0
>
> Well, all that error is saying is "No medium present". We could just
> make sd suppress that error on disk starting/stopping..

Yes, provided that the start/stop command is valid for ATAPI drives and is the 
correct thing to do. I don't know.

>
> > Signed-off-by: Ondrej Zary <linux@...nbow-software.org>
> > Signed-off-by: Tejun Heo <htejun@...il.com>
> > ---
> > Trimmed message body and reformatted such that it's script friendly.
> >
> >  drivers/ata/libata-scsi.c |    3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > --- linux-2.6.23-orig/drivers/ata/libata-scsi.c	2007-10-09
> > 22:31:38.000000000 +0200 +++
> > linux-2.6.23-pentium/drivers/ata/libata-scsi.c	2008-01-05
> > 15:50:16.000000000 +0100 @@ -802,7 +802,8 @@
> >
> >  	blk_queue_max_phys_segments(sdev->request_queue, LIBATA_MAX_PRD);
> >
> > -	sdev->manage_start_stop = 1;
> > +	if (dev->class == ATA_DEV_ATA)
> > +		sdev->manage_start_stop = 1;
> >
> >  	if (dev)
> >  		ata_scsi_dev_config(sdev, dev);



-- 
Ondrej Zary
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