drm/i915: Add locks around audio component bind/unbind
This will make sure that audio callbacks do not race with
component bind/unbind.
[Note: this is an update patch to commit [51e1d83cab99: drm/i915: Call
audio pin/ELD notify function] where I mistakenly applied the older
version. Jani and Daniel's review tags were to the latest version,
so I add them below, too -- tiwai]
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/drivers/gpu/drm/i915/intel_audio.c b/drivers/gpu/drm/i915/intel_audio.c
index 2d52d96..678a34f 100644
--- a/drivers/gpu/drm/i915/intel_audio.c
+++ b/drivers/gpu/drm/i915/intel_audio.c
@@ -543,9 +543,11 @@
if (WARN_ON(acomp->ops || acomp->dev))
return -EEXIST;
+ drm_modeset_lock_all(dev_priv->dev);
acomp->ops = &i915_audio_component_ops;
acomp->dev = i915_dev;
dev_priv->audio_component = acomp;
+ drm_modeset_unlock_all(dev_priv->dev);
return 0;
}
@@ -556,9 +558,11 @@
struct i915_audio_component *acomp = data;
struct drm_i915_private *dev_priv = dev_to_i915(i915_dev);
+ drm_modeset_lock_all(dev_priv->dev);
acomp->ops = NULL;
acomp->dev = NULL;
dev_priv->audio_component = NULL;
+ drm_modeset_unlock_all(dev_priv->dev);
}
static const struct component_ops i915_audio_component_bind_ops = {