r600g,radeonsi: fix broken buffer download

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/src/gallium/drivers/radeon/r600_buffer_common.c b/src/gallium/drivers/radeon/r600_buffer_common.c
index a7ecfb3..d56a644 100644 (file)
--- a/src/gallium/drivers/radeon/r600_buffer_common.c
+++ b/src/gallium/drivers/radeon/r600_buffer_common.c
@@ -285,7 +285,7 @@ static void *r600_buffer_transfer_map(struct pipe_context *ctx,
 
                        /* Copy the VRAM buffer to the staging buffer. */
                        rctx->dma_copy(ctx, &staging->b.b, 0,
-                                      box->x % R600_MAP_BUFFER_ALIGNMENT,
+                                      offset + box->x % R600_MAP_BUFFER_ALIGNMENT,
                                       0, 0, resource, level, box);
 
                        /* Just do the synchronization. The buffer is mapped already. */