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authorAlex Williamson <alex.williamson@redhat.com>2011-04-21 16:08:14 -0600
committerKeith Packard <keithp@keithp.com>2011-05-09 09:13:22 -0700
commit2fb4e61d9471867677c97bf11dba8f1e9dfa7f7c (patch)
tree4a1884e1fb0b26f43898ca16a71f5b757d932c1d
parent39adb7a542db08998b4ae88f1698c4300dc39b55 (diff)
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drm/i915/lvds: Only act on lid notify when the device is on
If we're using vga switcheroo, the device may be turned off and poking it can return random state. This provokes an OOPS fixed separately by 8ff887c847 (drm/i915/dp: Be paranoid in case we disable a DP before it is attached). Trying to use and respond to events on a device that has been turned off by the user is in principle a silly thing to do. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: stable@kernel.org Signed-off-by: Keith Packard <keithp@keithp.com>
-rw-r--r--drivers/gpu/drm/i915/intel_lvds.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_lvds.c b/drivers/gpu/drm/i915/intel_lvds.c
index a562bd2648c7..67cb076d271b 100644
--- a/drivers/gpu/drm/i915/intel_lvds.c
+++ b/drivers/gpu/drm/i915/intel_lvds.c
@@ -539,6 +539,9 @@ static int intel_lid_notify(struct notifier_block *nb, unsigned long val,
struct drm_device *dev = dev_priv->dev;
struct drm_connector *connector = dev_priv->int_lvds_connector;
+ if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
+ return NOTIFY_OK;
+
/*
* check and update the status of LVDS connector after receiving
* the LID nofication event.