Re: [PATCH 2/2] dm-mpath: Allow 'default' hardware handler

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On Mon, Apr 02 2012 at 12:43pm -0400,
Hannes Reinecke <hare@xxxxxxx> wrote:

> This patch introduces a 'default' hardware handler for dm-mpath.
> When specifying '1 default' dm-multipath will be using the currently
> attached hardware handler.
> 
> Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
> ---
>  drivers/md/dm-mpath.c |    8 ++++++--
>  1 files changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
> index 922a338..bbf950f 100644
> --- a/drivers/md/dm-mpath.c
> +++ b/drivers/md/dm-mpath.c
> @@ -586,15 +586,19 @@ static struct pgpath *parse_path(struct dm_arg_set *as, struct path_selector *ps
>  
>  	if (m->hw_handler_name) {
>  		struct request_queue *q = bdev_get_queue(p->path.dev->bdev);
> +		char *hw_handler = NULL;
>  
> -		r = scsi_dh_attach(q, m->hw_handler_name);
> +		if (strncmp(m->hw_handler_name, "default", 6))
> +			hw_handler = m->hw_handler_name;

Should be: if (strncmp(m->hw_handler_name, "default", 7))
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