linux-kernel - Re: [PATCH v2 19/20] drm/dp_mst: Drop DRM_ERROR() on kzalloc() fail in drm_dp_mst_handle_up

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Date:   Tue, 30 Mar 2021 13:06:01 +0200
From:   Robert Foss <robert.foss@...aro.org>
To:     Lyude Paul <lyude@...hat.com>
Cc:     nouveau@...ts.freedesktop.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        amd-gfx@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 19/20] drm/dp_mst: Drop DRM_ERROR() on kzalloc() fail
 in drm_dp_mst_handle_up_req()

Hey Lyude,

This patch looks good to me.

Reviewed-by: Robert Foss <robert.foss@...aro.org>

On Fri, 26 Mar 2021 at 21:40, Lyude Paul <lyude@...hat.com> wrote:
>
> Checkpatch was complaining about this - there's no need for us to print
> errors when kzalloc() fails, as kzalloc() will already WARN for us. So,
> let's fix that before converting things to make checkpatch happy.
>
> Signed-off-by: Lyude Paul <lyude@...hat.com>
> Cc: Robert Foss <robert.foss@...aro.org>
> ---
>  drivers/gpu/drm/drm_dp_mst_topology.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index ec2285595c33..74c420f5f204 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -4113,10 +4113,9 @@ static int drm_dp_mst_handle_up_req(struct drm_dp_mst_topology_mgr *mgr)
>                 return 0;
>
>         up_req = kzalloc(sizeof(*up_req), GFP_KERNEL);
> -       if (!up_req) {
> -               DRM_ERROR("Not enough memory to process MST up req\n");
> +       if (!up_req)
>                 return -ENOMEM;
> -       }
> +
>         INIT_LIST_HEAD(&up_req->next);
>
>         drm_dp_sideband_parse_req(&mgr->up_req_recv, &up_req->msg);
> --
> 2.30.2
>