Linux-libre 4.2-gnu

1 files changed, 18 insertions, 32 deletions

diff --git a/drivers/gpu/drm/qxl/qxl_ioctl.c b/drivers/gpu/drm/qxl/qxl_ioctl.c
index 7354a4cda..bda5c5f80 100644
--- a/drivers/gpu/drm/qxl/qxl_ioctl.c
+++ b/drivers/gpu/drm/qxl/qxl_ioctl.c
@@ -107,9 +107,9 @@ apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
 }
 
 /* return holding the reference to this object */
-static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
-					 struct drm_file *file_priv, uint64_t handle,
-					 struct qxl_release *release)
+static int qxlhw_handle_to_bo(struct qxl_device *qdev,
+			      struct drm_file *file_priv, uint64_t handle,
+			      struct qxl_release *release, struct qxl_bo **qbo_p)
 {
 	struct drm_gem_object *gobj;
 	struct qxl_bo *qobj;
@@ -117,17 +117,17 @@ static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 
 	gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
 	if (!gobj)
-		return NULL;
+		return -EINVAL;
 
 	qobj = gem_to_qxl_bo(gobj);
 
 	ret = qxl_release_list_add(release, qobj);
-	if (ret) {
-		drm_gem_object_unreference_unlocked(gobj);
-		return NULL;
-	}
+	drm_gem_object_unreference_unlocked(gobj);
+	if (ret)
+		return ret;
 
-	return qobj;
+	*qbo_p = qobj;
+	return 0;
 }
 
 /*
@@ -145,7 +145,7 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 	struct qxl_release *release;
 	struct qxl_bo *cmd_bo;
 	void *fb_cmd;
-	int i, j, ret, num_relocs;
+	int i, ret, num_relocs;
 	int unwritten;
 
 	switch (cmd->type) {
@@ -212,7 +212,7 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 		/* add the bos to the list of bos to validate -
 		   need to validate first then process relocs? */
 		if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
-			DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
+			DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 
 			ret = -EINVAL;
 			goto out_free_bos;
@@ -220,13 +220,10 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 		reloc_info[i].type = reloc.reloc_type;
 
 		if (reloc.dst_handle) {
-			reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
-								  reloc.dst_handle, release);
-			if (!reloc_info[i].dst_bo) {
-				ret = -EINVAL;
-				reloc_info[i].src_bo = NULL;
+			ret = qxlhw_handle_to_bo(qdev, file_priv, reloc.dst_handle, release,
+						 &reloc_info[i].dst_bo);
+			if (ret)
 				goto out_free_bos;
-			}
 			reloc_info[i].dst_offset = reloc.dst_offset;
 		} else {
 			reloc_info[i].dst_bo = cmd_bo;
@@ -235,16 +232,11 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 		num_relocs++;
 
 		/* reserve and validate the reloc dst bo */
-		if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
-			reloc_info[i].src_bo =
-				qxlhw_handle_to_bo(qdev, file_priv,
-						   reloc.src_handle, release);
-			if (!reloc_info[i].src_bo) {
-				if (reloc_info[i].dst_bo != cmd_bo)
-					drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
-				ret = -EINVAL;
+		if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
+			ret = qxlhw_handle_to_bo(qdev, file_priv, reloc.src_handle, release,
+						 &reloc_info[i].src_bo);
+			if (ret)
 				goto out_free_bos;
-			}
 			reloc_info[i].src_offset = reloc.src_offset;
 		} else {
 			reloc_info[i].src_bo = NULL;
@@ -271,12 +263,6 @@ static int qxl_process_single_command(struct qxl_device *qdev,
 		qxl_release_fence_buffer_objects(release);
 
 out_free_bos:
-	for (j = 0; j < num_relocs; j++) {
-		if (reloc_info[j].dst_bo != cmd_bo)
-			drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
-		if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
-			drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
-	}
 out_free_release:
 	if (ret)
 		qxl_release_free(qdev, release);