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path: root/drivers/char/drm/via_video.c
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Diffstat (limited to 'drivers/char/drm/via_video.c')
-rw-r--r--drivers/char/drm/via_video.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/char/drm/via_video.c b/drivers/char/drm/via_video.c
index 7fab9fbdf42..300ac61b09e 100644
--- a/drivers/char/drm/via_video.c
+++ b/drivers/char/drm/via_video.c
@@ -50,8 +50,11 @@ void via_release_futex(drm_via_private_t * dev_priv, int context)
unsigned int i;
volatile int *lock;
+ if (!dev_priv->sarea_priv)
+ return;
+
for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
- lock = (int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
+ lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
if (_DRM_LOCK_IS_HELD(*lock)
&& (*lock & _DRM_LOCK_CONT)) {
@@ -79,7 +82,7 @@ int via_decoder_futex(DRM_IOCTL_ARGS)
if (fx.lock > VIA_NR_XVMC_LOCKS)
return -EFAULT;
- lock = (int *)XVMCLOCKPTR(sAPriv, fx.lock);
+ lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx.lock);
switch (fx.func) {
case VIA_FUTEX_WAIT: