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authorPatrik Jakobsson <patrik.r.jakobsson@gmail.com>2014-01-08 19:30:40 +0100
committerPatrik Jakobsson <patrik.r.jakobsson@gmail.com>2014-01-28 12:57:20 +0100
commit631794b44bd3dbfba37074954d5c584c9e8725f0 (patch)
treea0c6e8db5e08bd143c53b8b6d7d3ac200420d9a6 /drivers/gpu
parenta4ab86bc78f354eb782af5dc3c5f4177c7f64ed1 (diff)
drm/gma500: Lock struct_mutex around cursor updates
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64361 Cc: <stable@vger.kernel.org> Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/gma500/gma_display.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c
index 24e8af3d22b..386de2c9dc8 100644
--- a/drivers/gpu/drm/gma500/gma_display.c
+++ b/drivers/gpu/drm/gma500/gma_display.c
@@ -349,6 +349,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
/* If we didn't get a handle then turn the cursor off */
if (!handle) {
temp = CURSOR_MODE_DISABLE;
+ mutex_lock(&dev->struct_mutex);
if (gma_power_begin(dev, false)) {
REG_WRITE(control, temp);
@@ -365,6 +366,7 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
gma_crtc->cursor_obj = NULL;
}
+ mutex_unlock(&dev->struct_mutex);
return 0;
}
@@ -374,9 +376,12 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
return -EINVAL;
}
+ mutex_lock(&dev->struct_mutex);
obj = drm_gem_object_lookup(dev, file_priv, handle);
- if (!obj)
- return -ENOENT;
+ if (!obj) {
+ ret = -ENOENT;
+ goto unlock;
+ }
if (obj->size < width * height * 4) {
dev_dbg(dev->dev, "Buffer is too small\n");
@@ -440,10 +445,13 @@ int gma_crtc_cursor_set(struct drm_crtc *crtc,
}
gma_crtc->cursor_obj = obj;
+unlock:
+ mutex_unlock(&dev->struct_mutex);
return ret;
unref_cursor:
drm_gem_object_unreference(obj);
+ mutex_unlock(&dev->struct_mutex);
return ret;
}