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drm: vkms: check status of alloc_ordered_workqueue 

alloc_ordered_workqueue may fail and return NULL.
The fix returns ENOMEM when it fails to avoid potential NULL
pointer dereference.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190309043628.6078-1-kjlu@umn.edu
This commit is contained in:
Kangjie Lu 2019-03-08 22:36:27 -06:00 committed by Daniel Vetter
parent 60e6ecfb61
commit 208c6e8cff
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/vkms/vkms_crtc.c
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@ -219,6 +219,8 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
spin_lock_init(&vkms_out->state_lock);
vkms_out->crc_workq = alloc_ordered_workqueue("vkms_crc_workq", 0);
if (!vkms_out->crc_workq)
return -ENOMEM;
return ret;
}