Re: [PATCH] drm/meson: fix memory leak on ->hpd_notify callback

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On 19/09/2023 11:54, Jani Nikula wrote:
On Fri, 15 Sep 2023, Neil Armstrong <neil.armstrong@xxxxxxxxxx> wrote:
On 14/09/2023 15:10, Jani Nikula wrote:
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@xxxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Cc: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
Cc: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
Cc: linux-amlogic@xxxxxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx> # v5.17+
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>

---

UNTESTED
---
   drivers/gpu/drm/meson/meson_encoder_hdmi.c | 2 ++
   1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/meson/meson_encoder_hdmi.c b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
index 9913971fa5d2..25ea76558690 100644
--- a/drivers/gpu/drm/meson/meson_encoder_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_encoder_hdmi.c
@@ -334,6 +334,8 @@ 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);
   }

Reviewed-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>

Thanks. I don't seem to have a toolchain to get this to build... would
you mind applying this, please?

Sure I'll handle this.

Thanks,
Neil


BR,
Jani.






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