3.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: Sam Bobroff <[email protected]> commit dc25ab067645eabd037f1a23d49a666f9e0b8c68 upstream. If the platform has no IO space, ioregs is placed next to the already allocated regs. In this case, it should not be separately freed. This prevents a kernel warning from __vunmap "Trying to vfree() nonexistent vm area" when unloading the driver. Fixes: 0dd68309b9c5 ("drm/ast: Try to use MMIO registers when PIO isn't supported") Signed-off-by: Sam Bobroff <[email protected]> Cc: <[email protected]> Signed-off-by: Dave Airlie <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/gpu/drm/ast/ast_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -489,7 +489,8 @@ int ast_driver_unload(struct drm_device drm_mode_config_cleanup(dev); ast_mm_fini(ast); - pci_iounmap(dev->pdev, ast->ioregs); + if (ast->ioregs != ast->regs + AST_IO_MM_OFFSET) + pci_iounmap(dev->pdev, ast->ioregs); pci_iounmap(dev->pdev, ast->regs); kfree(ast); return 0;
