Re: [PATCH v2] drivers: loongson: fix memory leak in loongson2_guts_probe

From: Huacai Chen
Date: Tue Aug 01 2023 - 04:16:06 EST


Hi, Dongliang,

Reviewed-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
And please resend this patch with title "soc: loongson: fix memory
leak in loongson2_guts_probe()", cc Arnd and soc@xxxxxxxxxx, because
that is the most appropriate list for this patch.

Huacai

On Mon, Mar 6, 2023 at 10:55 AM Dongliang Mu <dzm91@xxxxxxxxxxx> wrote:
>
> drivers/soc/loongson/loongson2_guts.c:150 loongson2_guts_probe()
> warn: 'guts->regs' from ioremap() not released on lines: 131,135,139,143.
>
> Fix this by modifying ioremap to devm_ioremap.
>
> Note that, this patch is not tested due to the loongson architecture.
>
> Signed-off-by: Dongliang Mu <dzm91@xxxxxxxxxxx>
> ---
> v1->v2: instead of modifying error handling code, directly change
> ioremap to devm_ioremap.
> drivers/soc/loongson/loongson2_guts.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/soc/loongson/loongson2_guts.c b/drivers/soc/loongson/loongson2_guts.c
> index bace4bc8e03b..a053e3fdae09 100644
> --- a/drivers/soc/loongson/loongson2_guts.c
> +++ b/drivers/soc/loongson/loongson2_guts.c
> @@ -107,7 +107,7 @@ static int loongson2_guts_probe(struct platform_device *pdev)
> guts->little_endian = of_property_read_bool(np, "little-endian");
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - guts->regs = ioremap(res->start, res->end - res->start + 1);
> + guts->regs = devm_ioremap(dev, res->start, res->end - res->start + 1);
> if (IS_ERR(guts->regs))
> return PTR_ERR(guts->regs);
>
> --
> 2.39.2
>
>