[dm-devel] [PATCH] trivial fix to dm-emc.c

[Lars Marowsky-Bree]

On 2005-03-03T13:56:21, Dave Olien <dmo at osdl.org> wrote:

> Here's a trivial fix to the emc hardware
> handler module. The old code memset the hardware handler
> structure to zero AFTER it had initialized the structure's
> spinlock field to SPIN_LOCK_UNLOCKED.  The new patch moves the
> memset into the hardware handler allocator.
> 
> The old code would probably only have a problem if someone
> ran with spinlock debugging enabled, in which case SPIN_LOCK_UNLOCKED
> contains the value SPINLOCK_MAGIC.
> 
> I have no emc hardware to test this change.  However it does compile.

Alasdair, please merge, looks correct.

Signed-off-by: Lars Marowsky-Bree <lmb at suse.de>

> diff -ur linux-2.6.11-rc3-udm2-original/drivers/md/dm-emc.c linux-2.6.11-rc3-udm2-emc/drivers/md/dm-emc.c
> --- linux-2.6.11-rc3-udm2-original/drivers/md/dm-emc.c	2005-03-03 13:40:55.000000000 -0800
> +++ linux-2.6.11-rc3-udm2-emc/drivers/md/dm-emc.c	2005-03-03 13:44:38.000000000 -0800
> @@ -227,6 +227,7 @@
>  	struct emc_handler *h = kmalloc(sizeof(*h), GFP_KERNEL);
>  
>  	if (h) {
> +		memset(h, 0, sizeof(*h));
>  		h->lock = SPIN_LOCK_UNLOCKED;
>  	}
>  
> @@ -263,8 +264,6 @@
>  	if (!h)
>  		return -ENOMEM;
>  	
> -	memset(h, 0, sizeof(*h));
> -	
>  	hwh->context = h;
>  	
>  	if ((h->short_trespass = short_trespass))
> 
> --
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> dm-devel at redhat.com
> https://www.redhat.com/mailman/listinfo/dm-devel
> 
Sincerely,
    Lars Marowsky-Brée <lmb at suse.de>

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