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author | Patrik Jakobsson <patrik.r.jakobsson@gmail.com> | 2014-01-08 18:30:40 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-13 21:50:23 (GMT) |
commit | edf62c0841e48520b187099ac58a73484e8a1ae5 (patch) | |
tree | 9510db048dbdbec8bdce0728254a1d261b9b66f5 | |
parent | 1ace73498ed6eba21c608351d6b4f35de1d5de7d (diff) | |
download | linux-fsl-qoriq-edf62c0841e48520b187099ac58a73484e8a1ae5.tar.xz |
drm/gma500: Lock struct_mutex around cursor updates
commit 631794b44bd3dbfba37074954d5c584c9e8725f0 upstream.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=64361
Signed-off-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/gpu/drm/gma500/gma_display.c | 12 |
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 24e8af3..386de2c 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; } |