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drm/i915/gvt: To check whether workload scan and shadow has mutex hold
author
Ping Gao
<ping.a.gao@intel.com>
Tue, 4 Jul 2017 06:53:03 +0000
(14:53 +0800)
committer
Zhenyu Wang
<zhenyuw@linux.intel.com>
Thu, 10 Aug 2017 02:26:07 +0000
(10:26 +0800)
The function workload scan and shadow have to hold the drm.struct_mutex
before called. To avoid misusing of this function, add a lockdep assert
in it.
Signed-off-by: Ping Gao <ping.a.gao@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
drivers/gpu/drm/i915/gvt/scheduler.c
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diff --git
a/drivers/gpu/drm/i915/gvt/scheduler.c
b/drivers/gpu/drm/i915/gvt/scheduler.c
index
bd59c6d
..
ca1926d
100644
(file)
--- a/
drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/
drivers/gpu/drm/i915/gvt/scheduler.c
@@
-201,6
+201,8
@@
int intel_gvt_scan_and_shadow_workload(struct intel_vgpu_workload *workload)
struct intel_vgpu *vgpu = workload->vgpu;
int ret;
+ lockdep_assert_held(&dev_priv->drm.struct_mutex);
+
if (workload->shadowed)
return 0;