The lock must be held for the saving and restoring of VGA state.
Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
CC: Alexander Zhaunerchyk <alex.vi...@gmail.com>
CC: Andrey Rahmatullin <w...@wrar.name>
---
drivers/gpu/drm/i915/i915_suspend.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_suspend.c
b/drivers/gpu/drm/i915/i915_suspend.c
index 60a94d2..e8152d2 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -678,6 +678,7 @@ void i915_save_display(struct drm_device *dev)
}
/* VGA state */
+ mutex_lock(&dev->struct_mutex);
dev_priv->saveVGA0 = I915_READ(VGA0);
dev_priv->saveVGA1 = I915_READ(VGA1);
dev_priv->saveVGA_PD = I915_READ(VGA_PD);
@@ -687,6 +688,7 @@ void i915_save_display(struct drm_device *dev)
dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
i915_save_vga(dev);
+ mutex_unlock(&dev->struct_mutex);
}
void i915_restore_display(struct drm_device *dev)
@@ -780,6 +782,8 @@ void i915_restore_display(struct drm_device *dev)
I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
else
I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
+
+ mutex_lock(&dev->struct_mutex);
I915_WRITE(VGA0, dev_priv->saveVGA0);
I915_WRITE(VGA1, dev_priv->saveVGA1);
I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
@@ -787,6 +791,7 @@ void i915_restore_display(struct drm_device *dev)
udelay(150);
i915_restore_vga(dev);
+ mutex_unlock(&dev->struct_mutex);
}
int i915_save_state(struct drm_device *dev)
--
1.7.5.2
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