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From: Matthew Dharm <mdharm-kernel@one-eyed-alien.net>
To: Andrew Morton <akpm@zip.com.au>
Cc: timothy.covell@ashavan.org, linux-kernel@vger.kernel.org,
	Alan Cox <alan@lxorguk.ukuu.org.uk>,
	support@redhat.com
Subject: Re: Fwd: Hard Lockup on 2.4.16 with Via ieee1394 (sbp2 mode)
Date: Fri, 28 Dec 2001 20:40:41 -0800	[thread overview]
Message-ID: <20011228204041.A14736@one-eyed-alien.net> (raw)
In-Reply-To: <200112290321.fBT3GCSs007627@svr3.applink.net> <3C2D3DBB.6ADE1CC5@zip.com.au>
In-Reply-To: <3C2D3DBB.6ADE1CC5@zip.com.au>; from akpm@zip.com.au on Fri, Dec 28, 2001 at 07:51:23PM -0800

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Hrm...

Does this apply to usb-storage also?  Under what conditions do you need to
hold the io_request_lock when calling the done function?

usb-storage calls it from task context, not from IRQ context.... if that
makes any difference.

Matt

On Fri, Dec 28, 2001 at 07:51:23PM -0800, Andrew Morton wrote:
> Timothy Covell wrote:
> > 
> > lockup
> > ...
> > sbp2
> > ...
> > SMP
> > ...
> 
> --- linux-2.4.17-pre8/drivers/ieee1394/sbp2.c	Mon Dec 10 13:46:20 2001
> +++ linux-akpm/drivers/ieee1394/sbp2.c	Wed Dec 12 20:50:16 2001
> @@ -2773,7 +2773,9 @@ static void sbp2scsi_complete_command(st
>  	/*
>  	 * Tell scsi stack that we're done with this command
>  	 */
> +	spin_lock_irq(&io_request_lock);
>  	done (SCpnt);
> +	spin_unlock_irq(&io_request_lock);
>  
>  	return;
>  }
> 
> -
> -
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-- 
Matthew Dharm                              Home: mdharm-usb@one-eyed-alien.net 
Maintainer, Linux USB Mass Storage Driver

Da.  Am thinkink of carbonated borscht for lonk nights of coding.
					-- Pitr
User Friendly, 7/24/1998

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  reply	other threads:[~2001-12-29  4:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-12-29  3:13 Timothy Covell
2001-12-29  3:51 ` Andrew Morton
2001-12-29  4:40   ` Matthew Dharm [this message]
2001-12-29  4:59     ` Andrew Morton
2001-12-29  5:11       ` Matthew Dharm
2001-12-29  6:17   ` Timothy Covell

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