r600g: fix random corruption with CP DMA in TF2

NOTE: This is a candidate for the 9.1 branch.

diff --git a/src/gallium/drivers/r600/r600_hw_context.c b/src/gallium/drivers/r600/r600_hw_context.c
index ebcd682bc811f010d18635f2482e17c14e2ac37e..f6dc418746d8080aebcbe1f80d6da354abd1f7e0 100644 (file)
--- a/src/gallium/drivers/r600/r600_hw_context.c
+++ b/src/gallium/drivers/r600/r600_hw_context.c
@@ -1159,6 +1159,9 @@ void r600_cp_dma_copy_buffer(struct r600_context *rctx,
                src_offset += byte_count;
                dst_offset += byte_count;
        }
+
+       /* Invalidate the read caches. */
+       rctx->flags |= R600_CONTEXT_INVAL_READ_CACHES;
 }
 
 void r600_need_dma_space(struct r600_context *ctx, unsigned num_dw)