Re: [PATCH] of: Fix issue where code would fall through to error case.

From: Frank Rowand
Date: Thu Nov 17 2016 - 19:03:48 EST


On 11/17/16 15:40, Frank Rowand wrote:
> On 11/17/16 15:25, Moritz Fischer wrote:
>> No longer fall through into the error case that prints out
>> an error if no error (err = 0) occurred.
>>
>> Fixes d9181b20a83(of: Add back an error message, restructured)
>> Signed-off-by: Moritz Fischer <moritz.fischer@xxxxxxxxx>
>> ---
>> drivers/of/resolver.c | 6 +++++-
>> 1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/of/resolver.c b/drivers/of/resolver.c
>> index 783bd09..785076d 100644
>> --- a/drivers/of/resolver.c
>> +++ b/drivers/of/resolver.c
>> @@ -358,9 +358,13 @@ int of_resolve_phandles(struct device_node *overlay)
>>
>> err = update_usages_of_a_phandle_reference(overlay, prop, phandle);
>> if (err)
>> - break;
>> + goto err_out;
>> }
>>
>> + of_node_put(tree_symbols);
>> +
>> + return 0;
>> +
>> err_out:
>> pr_err("overlay phandle fixup failed: %d\n", err);
>> out:
>
> Thanks for catching that.
>
> Rob, please apply.
>
> Reviewed-by: Frank Rowand <frank.rowand@xxxxxxxxxxx>
>
> -Frank

On second thought, isn't the common pattern when clean up is needed for
both the no-error path and the error path something like:


out:
of_node_put(tree_symbols);
return err;

err_out:
pr_err("overlay phandle fixup failed: %d\n", err);
goto out;
}


I don't have a strong opinion, whatever Rob wants to take is fine with me.

-Frank