From: Hsin-Yi Wang <hsinyi@chromium.org>
To: Frank Wunderlich <linux@fw-web.de>
Cc: "moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>,
Frank Wunderlich <frank-w@public-files.de>,
Chun-Kuang Hu <chunkuang.hu@kernel.org>,
Philipp Zabel <p.zabel@pengutronix.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Matthias Brugger <matthias.bgg@gmail.com>,
Jitao Shi <jitao.shi@mediatek.com>,
Rex-BC Chen <rex-bc.chen@mediatek.com>,
dri-devel <dri-devel@lists.freedesktop.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@lists.infradead.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/mediatek: dpi: fix NULL dereference in mtk_dpi_bridge_atomic_check
Date: Thu, 15 Jul 2021 18:28:53 +0800 [thread overview]
Message-ID: <CAJMQK-i9cGUUXLDr95nCghLd6jmR0tmdPv_PiyN1gC1+JD-2Mw@mail.gmail.com> (raw)
In-Reply-To: <20210712080736.116435-1-linux@fw-web.de>
On Mon, Jul 12, 2021 at 4:08 PM Frank Wunderlich <linux@fw-web.de> wrote:
>
> From: Frank Wunderlich <frank-w@public-files.de>
>
> bridge->driver_private is not set (NULL) so use bridge_to_dpi(bridge)
> like it's done in bridge_atomic_get_output_bus_fmts
>
> Fixes: ec8747c52434 ("drm/mediatek: dpi: Add bus format negotiation")
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested on a mt8183 device.
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index bced555648b0..a2eca1f66984 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -605,7 +605,7 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
> struct drm_crtc_state *crtc_state,
> struct drm_connector_state *conn_state)
> {
> - struct mtk_dpi *dpi = bridge->driver_private;
> + struct mtk_dpi *dpi = bridge_to_dpi(bridge);
> unsigned int out_bus_format;
>
> out_bus_format = bridge_state->output_bus_cfg.format;
> --
> 2.25.1
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek
next prev parent reply other threads:[~2021-07-15 10:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 8:07 [PATCH] drm/mediatek: dpi: fix NULL dereference in mtk_dpi_bridge_atomic_check Frank Wunderlich
2021-07-15 10:28 ` Hsin-Yi Wang [this message]
2021-07-16 5:15 ` CK Hu
2021-07-22 0:42 ` Chun-Kuang Hu
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