From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v5 01/22] xen/arm: Return success if dt node
 does not have irq mapping
Date: Wed, 2 Sep 2015 16:25:56 +0100
Message-ID: <1441207556.26292.251.camel@citrix.com>
References: <1437995524-19772-1-git-send-email-vijay.kilari@gmail.com>
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To: vijay.kilari@gmail.com, julien.grall@citrix.com, stefano.stabellini@eu.citrix.com, stefano.stabellini@citrix.com, tim@xen.org, xen-devel@lists.xen.org
Cc: Prasun.Kapoor@caviumnetworks.com, manish.jaggi@caviumnetworks.com, Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
List-Id: xen-devel@lists.xenproject.org

On Mon, 2015-07-27 at 16:41 +0530, vijay.kilari@gmail.com wrote:
> From: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>
> 
> dt_for_each_irq_map() returns error if no irq mapping is found.
> With this patch, Ignore error and return success
> 
> Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@caviumnetworks.com>

Acked-by: Ian Campbell <ian.campbell@citrix.com>

Wei -- I think this fix would be good to have for 4.6. It is not an error
to process a zero-length (==non-existent) array I think.

Julien proposed retitling to "xen/dt: Handle correctly node with interrupt
-map in dt_for_each_irq_map", I think he meant s/with/without/ in that
though.

> ---
>  xen/common/device_tree.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c
> index 323c3be..1325ad5 100644
> --- a/xen/common/device_tree.c
> +++ b/xen/common/device_tree.c
> @@ -1085,7 +1085,7 @@ int dt_for_each_irq_map(const struct dt_device_node 
> *dev,
>      if ( imap == NULL )
>      {
>          dt_dprintk(" -> no map, ignoring\n");
> -        goto fail;
> +        return 0;
>      }
>      imaplen /= sizeof(u32);
>