linux-kernel - Re: [patch 2/6] ide: fix ide_kill_rq() for special ide-{floppy,tape} driver requests

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Date:	Tue, 23 Jun 2009 16:16:11 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	bzolnier@...il.com
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	petkovbb@...il.com, htejun@...il.com
Subject: Re: [patch 2/6] ide: fix ide_kill_rq() for special
 ide-{floppy,tape} driver requests

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Date: Tue, 23 Jun 2009 23:26:06 +0200

> From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> Subject: [PATCH] ide: fix ide_kill_rq() for special ide-{floppy,tape} driver requests
> 
> Such requests should be failed with -EIO (like all other requests
> in this function) instead of being completed successfully.
> 
> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> ---
> Untested, you may try pinging Borislav and/or Tejun about possible
> testing if you would like to verify the patch before applying.

This must be tested in some way.  I can see this potentially
breaking something.

Especially this is true because ide_complete_rq() does it's
"complete whole request right now" logic for error <= 0.

Borislov/Tejun, can either of you test this code path with this
change applied?  I'd very much appreciate it.

Thanks!

>  drivers/ide/ide-io.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: b/drivers/ide/ide-io.c
> ===================================================================
> --- a/drivers/ide/ide-io.c
> +++ b/drivers/ide/ide-io.c
> @@ -152,7 +152,7 @@ void ide_kill_rq(ide_drive_t *drive, str
>  
>  	if ((media == ide_floppy || media == ide_tape) && drv_req) {
>  		rq->errors = 0;
> -		ide_complete_rq(drive, 0, blk_rq_bytes(rq));
> +		ide_complete_rq(drive, -EIO, blk_rq_bytes(rq));
>  	} else {
>  		if (media == ide_tape)
>  			rq->errors = IDE_DRV_ERROR_GENERAL;
--
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