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Commit 7e60946f authored by Xiong Zhang's avatar Xiong Zhang Committed by Zhenyu Wang
Browse files

drm/i915/gvt: Release gvt->lock at the failure of finding page track 



page_track_handler take lock at the beginning, the lock should be released
at the failure of finding page track. Otherwise deadlock will happen.

Fixes: e502a2af ("drm/i915/gvt: Provide generic page_track infrastructure for write-protected page")
Signed-off-by: default avatarXiong Zhang <xiong.y.zhang@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent 6846dfeb

drivers/gpu/drm/i915/gvt/page_track.c

+2 −1
Original line number Diff line number Diff line
@@ -165,7 +165,7 @@ int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa, 


	page_track = intel_vgpu_find_page_track(vgpu, gpa >> PAGE_SHIFT);

	if (!page_track)

		return 0;

		goto out;



	if (unlikely(vgpu->failsafe)) {

		/* Remove write protection to prevent furture traps. */
@@ -176,6 +176,7 @@ int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa, 
			gvt_err("guest page write error, gpa %llx\n", gpa);

	}



out:

	mutex_unlock(&gvt->lock);

	return ret;

}