Reading access to connector->eld can happen at the same time the
drm_edid_to_eld() updates the data. Take the newly added eld_mutex in
order to protect connector->eld from concurrent access.
Reviewed-by: Maxime Ripard <mripard@xxxxxxxxxx>
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Acked-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_audio.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
index 32aa9ec1a204d2ecde46cad36598aa768a3af671..3902ab8431139c3ff4dc17b841d94b6d3241dec3 100644
--- a/drivers/gpu/drm/i915/display/intel_audio.c
+++ b/drivers/gpu/drm/i915/display/intel_audio.c
@@ -699,10 +699,12 @@ bool intel_audio_compute_config(struct intel_encoder *encoder,
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
+ mutex_lock(&connector->eld_mutex);
if (!connector->eld[0]) {
drm_dbg_kms(&i915->drm,
"Bogus ELD on [CONNECTOR:%d:%s]\n",
connector->base.id, connector->name);
+ mutex_unlock(&connector->eld_mutex);
return false;
}
@@ -710,6 +712,7 @@ bool intel_audio_compute_config(struct intel_encoder *encoder,
memcpy(crtc_state->eld, connector->eld, sizeof(crtc_state->eld));
crtc_state->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
+ mutex_unlock(&connector->eld_mutex);
return true;
}
--
2.39.5
