I can not remember why the original code did return 0 rather than an error, but
-ENOMEM seems indeed way more fitting.
Reviewed-by: Pierre Moreau <pierre.morrow@xxxxxxx>
On 2021-04-14 — 08:58, Dan Carpenter wrote:
> If nouveau_get_backlight_name() fails then this should return -ENOMEM
> but currently it returns success.
>
> Fixes: db1a0ae21461 ("drm/nouveau/bl: Assign different names to interfaces")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> ---
> This is from static analysis. In the original commit db1a0ae21461
> ("drm/nouveau/bl: Assign different names to interfaces") then returning
> zero seemed to be a very deliberate choice. I do think it was wrong
> though and -ENOMEM is the currect return.
>
> drivers/gpu/drm/nouveau/nouveau_backlight.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
> index 72f35a2babcb..3786b1c85182 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
> @@ -274,6 +274,7 @@ nouveau_backlight_init(struct drm_connector *connector)
>
> if (!nouveau_get_backlight_name(backlight_name, bl)) {
> NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
> + ret = -ENOMEM;
> goto fail_alloc;
> }
>
> --
> 2.30.2
>
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