Re: [PATCH] of: fix incorrect return value of of_find_matching_node_and_match()

[Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On 01/20/2013 03:56 PM, Thomas Abraham wrote:
> On 20 January 2013 13:50, Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> On 01/19/2013 12:20 PM, Thomas Abraham wrote:
>>> The of_find_matching_node_and_match() function incorrectly sets the matched
>>> entry to 'matches' when the compatible value of a node matches one of the
>>> possible values. This results in incorrectly selecting the the first entry in
>>> the 'matches' list as the matched entry. Fix this by noting down the result of
>>> the call to of_match_node() and setting that as the matched entry.
>>
>> Looks fine, but is this breaking something in 3.8 or can it wait for 3.9?
> 
> Yes, it can wait for 3.9. I am using this function while adding device
> tree support for timers on exynos platform which will probably merged
> in 3.9.

Applied for 3.9. It's in my for-next branch on sources.calxeda.com. This
is a stable branch.

Rob

> 
> Thanks,
> Thomas.
> 
>>
>> Rob
>>
>>>
>>> Signed-off-by: Thomas Abraham <thomas.abraham-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>>> ---
>>>  drivers/of/base.c |    6 ++++--
>>>  1 files changed, 4 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/of/base.c b/drivers/of/base.c
>>> index 2390ddb..960ae5b 100644
>>> --- a/drivers/of/base.c
>>> +++ b/drivers/of/base.c
>>> @@ -612,6 +612,7 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
>>>                                       const struct of_device_id **match)
>>>  {
>>>       struct device_node *np;
>>> +     const struct of_device_id *m;
>>>
>>>       if (match)
>>>               *match = NULL;
>>> @@ -619,9 +620,10 @@ struct device_node *of_find_matching_node_and_match(struct device_node *from,
>>>       read_lock(&devtree_lock);
>>>       np = from ? from->allnext : of_allnodes;
>>>       for (; np; np = np->allnext) {
>>> -             if (of_match_node(matches, np) && of_node_get(np)) {
>>> +             m = of_match_node(matches, np);
>>> +             if (m && of_node_get(np)) {
>>>                       if (match)
>>> -                             *match = matches;
>>> +                             *match = m;
>>>                       break;
>>>               }
>>>       }
>>>