[PATCH] drm/i915/gvt: handle fence reg access during GPU reset

[Zhao, Xinda]

Lots of reduntant log info will be printed out during GPU reset,
including accessing untracked mmio register and fence register,
variable disable_warn_untrack is added previously to handle the
situation, but the accessing of fence register is ignored in the
previously patch, so add it back.

Besides, set the variable disable_warn_untrack to the defalut value
after GPU reset is finished.

Signed-off-by: Zhao, Xinda <xinda.zhao at intel.com>
---
 drivers/gpu/drm/i915/gvt/handlers.c | 12 ++++++++----
 drivers/gpu/drm/i915/gvt/mmio.c     |  2 ++
 2 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 1d45062..be5e66b 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -154,11 +154,15 @@ static int sanitize_fence_mmio_access(struct intel_vgpu *vgpu,
 		unsigned int fence_num, void *p_data, unsigned int bytes)
 {
 	if (fence_num >= vgpu_fence_sz(vgpu)) {
-		gvt_err("vgpu%d: found oob fence register access\n",
-				vgpu->id);
-		gvt_err("vgpu%d: total fence num %d access fence num %d\n",
-				vgpu->id, vgpu_fence_sz(vgpu), fence_num);
+		if (!vgpu->mmio.disable_warn_untrack) {
+			gvt_err("vgpu%d: found oob fence register access\n",
+					vgpu->id);
+			gvt_err("vgpu%d: total fence %d, access fence %d\n",
+					vgpu->id, vgpu_fence_sz(vgpu),
+					fence_num);
+		}
 		memset(p_data, 0, bytes);
+		return -EINVAL;
 	}
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/gvt/mmio.c b/drivers/gpu/drm/i915/gvt/mmio.c
index 4df078b..7a5bbb8 100644
--- a/drivers/gpu/drm/i915/gvt/mmio.c
+++ b/drivers/gpu/drm/i915/gvt/mmio.c
@@ -322,6 +322,8 @@ void intel_vgpu_reset_mmio(struct intel_vgpu *vgpu)
 
 	/* set the bit 0:2(Core C-State ) to C0 */
 	vgpu_vreg(vgpu, GEN6_GT_CORE_STATUS) = 0;
+
+	vgpu->mmio.disable_warn_untrack = false;
 }
 
 /**
-- 
2.7.4