Re: [PATCH 2/5] remoteproc: st: Call of_node_put() on iteration error

[Arnaud POULIQUEN <arnaud.pouliquen@foss.st.com>]

On 3/20/23 23:18, Mathieu Poirier wrote:
> Function of_phandle_iterator_next() calls of_node_put() on the last
> device_node it iterated over, but when the loop exits prematurely it has
> to be called explicitly.
> 
> Fixes: 3df52ed7f269 ("remoteproc: st: add reserved memory support")
> Cc: stable@vger.kernel.org
> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>

Thanks,
Arnaud

> ---
>  drivers/remoteproc/st_remoteproc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
> index a3268d95a50e..e6bd3c7a950a 100644
> --- a/drivers/remoteproc/st_remoteproc.c
> +++ b/drivers/remoteproc/st_remoteproc.c
> @@ -129,6 +129,7 @@ static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
>  	while (of_phandle_iterator_next(&it) == 0) {
>  		rmem = of_reserved_mem_lookup(it.node);
>  		if (!rmem) {
> +			of_node_put(it.node);
>  			dev_err(dev, "unable to acquire memory-region\n");
>  			return -EINVAL;
>  		}
> @@ -150,8 +151,10 @@ static int st_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
>  							   it.node->name);
>  		}
>  
> -		if (!mem)
> +		if (!mem) {
> +			of_node_put(it.node);
>  			return -ENOMEM;
> +		}
>  
>  		rproc_add_carveout(rproc, mem);
>  		index++;