4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx> commit 9bb92f51558f2ef5f56c257bdcea0588f31d857e upstream. open_key enables access the registers used by enable_mmio Signed-off-by: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx> Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Acked-by: Joel Stanley <joel@xxxxxxxxx> Tested-by: Y.C. Chen <yc_chen@xxxxxxxxxxxxxx> Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/ast/ast_post.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpu/drm/ast/ast_post.c +++ b/drivers/gpu/drm/ast/ast_post.c @@ -371,8 +371,8 @@ void ast_post_gpu(struct drm_device *dev pci_write_config_dword(ast->dev->pdev, 0x04, reg); ast_enable_vga(dev); - ast_enable_mmio(dev); ast_open_key(ast); + ast_enable_mmio(dev); ast_set_def_ext_reg(dev); if (ast->chip == AST2300 || ast->chip == AST2400)