drm/meson: fix memory leak on ->hpd_notify callback

commit 099f0af9d98231bb74956ce92508e87cbcb896be upstream.

The EDID returned by drm_bridge_get_edid() needs to be freed.

Fixes: 0af5e0b41110 ("drm/meson: encoder_hdmi: switch to bridge DRM_BRIDGE_ATTACH_NO_CONNECTOR")
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: Neil Armstrong <neil.armstrong@linaro.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: stable@vger.kernel.org # v5.17+
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230914131015.2472029-1-jani.nikula@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 53231bfdf7e2471610825b0d111a1178e84ab26d..b14e6e507c61bf22ed2adb97eddc0660d0fe2b3c 100644 (file)
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -332,6 +332,8 @@ static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
                        return;
 
                cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
+
+               kfree(edid);
        } else
                cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
 }