From: Henri Verbeet <hverbeet@gmail.com>
Date: Mon, 16 Aug 2010 20:18:37 +0000 (+0200)
Subject: r600g: Don't blindly unmap NULL->size.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8a878c266a8bf50b49d3ef8c5984790581e33133;p=mesa.git

r600g: Don't blindly unmap NULL->size.

There may actually be something mapped in that range, especially for large
buffers like e.g. the GL Drawable.
---

diff --git a/src/gallium/winsys/r600/drm/radeon_bo.c b/src/gallium/winsys/r600/drm/radeon_bo.c
index f259ae7fb57..a1306f6e9d2 100644
--- a/src/gallium/winsys/r600/drm/radeon_bo.c
+++ b/src/gallium/winsys/r600/drm/radeon_bo.c
@@ -145,7 +145,9 @@ struct radeon_bo *radeon_bo_decref(struct radeon *radeon, struct radeon_bo *bo)
 		return NULL;
 	}
 
-	munmap(bo->data, bo->size);
+	if (bo->map_count) {
+		munmap(bo->data, bo->size);
+	}
 	memset(&args, 0, sizeof(args));
 	args.handle = bo->handle;
 	drmIoctl(radeon->fd, DRM_IOCTL_GEM_CLOSE, &args);