linux-kernel - Re: [PATCH] esp_scsi: Fix reset cleanup spinlock recursion

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Date:	Wed, 05 Dec 2007 21:12:51 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	macro@...ux-mips.org
Cc:	James.Bottomley@...elEye.com, linux-scsi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] esp_scsi: Fix reset cleanup spinlock recursion

From: "Maciej W. Rozycki" <macro@...ux-mips.org>
Date: Wed, 5 Dec 2007 16:10:54 +0000 (GMT)

>  The esp_reset_cleanup() function is called with the host lock held and 
> invokes starget_for_each_device() which wants to take it too.  Here is a 
> fix along the lines of shost_for_each_device()/__shost_for_each_device() 
> adding a __starget_for_each_device() counterpart which assumes the lock 
> has already been taken.
> 
>  Eventually, I think the driver should get modified so that more work is 
> done as a softirq rather than in the interrupt context, but for now it 
> fixes a bug that causes the spinlock debugger to fire.
> 
>  While at it, it fixes a small number of cosmetic problems with 
> starget_for_each_device() too.
> 
> Signed-off-by: Maciej W. Rozycki <macro@...ux-mips.org>

Acked-by: David S. Miller <davem@...emloft.net>

Thanks for finding and fixing this bug.

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