[PATCH 5.15 182/183] drm/meson: fix memory leak on ->hpd_notify callback

[Greg Kroah-Hartman]

5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Jani Nikula <jani.nikula at intel.com>

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 at baylibre.com>
Cc: Sam Ravnborg <sam at ravnborg.org>
Cc: Martin Blumenstingl <martin.blumenstingl at googlemail.com>
Cc: Neil Armstrong <neil.armstrong at linaro.org>
Cc: Kevin Hilman <khilman at baylibre.com>
Cc: Jerome Brunet <jbrunet at baylibre.com>
Cc: dri-devel at lists.freedesktop.org
Cc: linux-amlogic at lists.infradead.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: stable at vger.kernel.org # v5.17+
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Reviewed-by: Neil Armstrong <neil.armstrong at linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong at linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230914131015.2472029-1-jani.nikula@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/gpu/drm/meson/meson_encoder_hdmi.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -326,6 +326,8 @@ static void meson_encoder_hdmi_hpd_notif
 			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);
 }