drm/i915/gvt: Rename reserved ring buffer

"reserved" means reserve something from somewhere. Actually they are
buffers used by command scanner. Rename it to ring_scan_buffer.

v2:

- Remove the usage of an extra variable. (Zhenyu)

Fixes: 0a53bc07f044 ("drm/i915/gvt: Separate cmd scan from request allocation")
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>

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

@@ -2619,21 +2619,21 @@ static int shadow_workload_ring_buffer(struct intel_vgpu_workload *workload)
 	gma_tail = workload->rb_start + workload->rb_tail;
 	gma_top = workload->rb_start + guest_rb_size;
 
-	if (workload->rb_len > vgpu->reserve_ring_buffer_size[ring_id]) {
-		void *va, *p;
+	if (workload->rb_len > vgpu->ring_scan_buffer_size[ring_id]) {
+		void *p;
 
 		/* realloc the new ring buffer if needed */
-		va = vgpu->reserve_ring_buffer_va[ring_id];
-		p = krealloc(va, workload->rb_len, GFP_KERNEL);
+		p = krealloc(vgpu->ring_scan_buffer[ring_id], workload->rb_len,
+				GFP_KERNEL);
 		if (!p) {
-			gvt_vgpu_err("fail to alloc reserve ring buffer\n");
+			gvt_vgpu_err("fail to re-alloc ring scan buffer\n");
 			return -ENOMEM;
 		}
-		vgpu->reserve_ring_buffer_va[ring_id] = p;
-		vgpu->reserve_ring_buffer_size[ring_id] = workload->rb_len;
+		vgpu->ring_scan_buffer[ring_id] = p;
+		vgpu->ring_scan_buffer_size[ring_id] = workload->rb_len;
 	}
 
-	shadow_ring_buffer_va = vgpu->reserve_ring_buffer_va[ring_id];
+	shadow_ring_buffer_va = vgpu->ring_scan_buffer[ring_id];
 
 	/* get shadow ring buffer va */
 	workload->shadow_ring_buffer_va = shadow_ring_buffer_va;

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

@@ -864,9 +864,9 @@ void intel_vgpu_clean_execlist(struct intel_vgpu *vgpu)
 	clean_workloads(vgpu, ALL_ENGINES);
 
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		kfree(vgpu->reserve_ring_buffer_va[i]);
-		vgpu->reserve_ring_buffer_va[i] = NULL;
-		vgpu->reserve_ring_buffer_size[i] = 0;
+		kfree(vgpu->ring_scan_buffer[i]);
+		vgpu->ring_scan_buffer[i] = NULL;
+		vgpu->ring_scan_buffer_size[i] = 0;
 	}
 }
 
@@ -881,21 +881,21 @@ int intel_vgpu_init_execlist(struct intel_vgpu *vgpu)
 
 	/* each ring has a shadow ring buffer until vgpu destroyed */
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		vgpu->reserve_ring_buffer_va[i] =
+		vgpu->ring_scan_buffer[i] =
 			kmalloc(RESERVE_RING_BUFFER_SIZE, GFP_KERNEL);
-		if (!vgpu->reserve_ring_buffer_va[i]) {
-			gvt_vgpu_err("fail to alloc reserve ring buffer\n");
+		if (!vgpu->ring_scan_buffer[i]) {
+			gvt_vgpu_err("fail to alloc ring scan buffer\n");
 			goto out;
 		}
-		vgpu->reserve_ring_buffer_size[i] = RESERVE_RING_BUFFER_SIZE;
+		vgpu->ring_scan_buffer_size[i] = RESERVE_RING_BUFFER_SIZE;
 	}
 	return 0;
 out:
 	for_each_engine(engine, vgpu->gvt->dev_priv, i) {
-		if (vgpu->reserve_ring_buffer_size[i]) {
-			kfree(vgpu->reserve_ring_buffer_va[i]);
-			vgpu->reserve_ring_buffer_va[i] = NULL;
-			vgpu->reserve_ring_buffer_size[i] = 0;
+		if (vgpu->ring_scan_buffer_size[i]) {
+			kfree(vgpu->ring_scan_buffer[i]);
+			vgpu->ring_scan_buffer[i] = NULL;
+			vgpu->ring_scan_buffer_size[i] = 0;
 		}
 	}
 	return -ENOMEM;

drivers/gpu/drm/i915/gvt/gvt.h

@@ -172,9 +172,9 @@ struct intel_vgpu {
 	struct intel_vgpu_opregion opregion;
 	struct intel_vgpu_display display;
 	struct intel_vgpu_submission submission;
-	/* 1/2K for each reserve ring buffer */
-	void *reserve_ring_buffer_va[I915_NUM_ENGINES];
-	int reserve_ring_buffer_size[I915_NUM_ENGINES];
+	/* 1/2K for each engine */
+	void *ring_scan_buffer[I915_NUM_ENGINES];
+	int ring_scan_buffer_size[I915_NUM_ENGINES];
 
 
 #if IS_ENABLED(CONFIG_DRM_I915_GVT_KVMGT)