radeon: rework mipmap tree reference counting

2 files changed, 8 insertions, 17 deletions

diff --git a/src/mesa/drivers/dri/r300/r300_tex.c b/src/mesa/drivers/dri/r300/r300_tex.c
index 427237d200..7e94e93df2 100644
--- a/src/mesa/drivers/dri/r300/r300_tex.c
+++ b/src/mesa/drivers/dri/r300/r300_tex.c
@@ -228,11 +228,8 @@ static void r300TexParameter(GLcontext * ctx, GLenum target,
 		 * we just have to rely on loading the right subset of mipmap levels
 		 * to simulate a clamped LOD.
 		 */
-		if (t->mt) {
-			radeon_miptree_unreference(t->mt);
-			t->mt = 0;
-			t->validated = GL_FALSE;
-		}
+		radeon_miptree_unreference(&t->mt);
+		t->validated = GL_FALSE;
 		break;
 
 	case GL_DEPTH_TEXTURE_MODE:
@@ -286,10 +283,8 @@ static void r300DeleteTexture(GLcontext * ctx, struct gl_texture_object *texObj)
 		t->bo = NULL;
 	}
 
-	if (t->mt) {
-		radeon_miptree_unreference(t->mt);
-		t->mt = 0;
-	}
+	radeon_miptree_unreference(&t->mt);
+
 	_mesa_delete_texture_object(ctx, texObj);
 }
 
diff --git a/src/mesa/drivers/dri/r300/r300_texstate.c b/src/mesa/drivers/dri/r300/r300_texstate.c
index 4699342994..7b1adcf31d 100644
--- a/src/mesa/drivers/dri/r300/r300_texstate.c
+++ b/src/mesa/drivers/dri/r300/r300_texstate.c
@@ -438,14 +438,10 @@ void r300SetTexBuffer2(__DRIcontext *pDRICtx, GLint target, GLint glx_texture_fo
 		radeon_bo_unref(rImage->bo);
 		rImage->bo = NULL;
 	}
-	if (t->mt) {
-		radeon_miptree_unreference(t->mt);
-		t->mt = NULL;
-	}
-	if (rImage->mt) {
-		radeon_miptree_unreference(rImage->mt);
-		rImage->mt = NULL;
-	}
+
+	radeon_miptree_unreference(&t->mt);
+	radeon_miptree_unreference(&rImage->mt);
+
 	_mesa_init_teximage_fields(radeon->glCtx, target, texImage,
 				   rb->base.Width, rb->base.Height, 1, 0, rb->cpp);
 	texImage->RowStride = rb->pitch / rb->cpp;