tty: ar933x_uart: convert to use devm_* functions
Use devm_* functions in order to simplify cleanup
paths.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/ar933x_uart.c b/drivers/tty/serial/ar933x_uart.c
index 7aa9062..3f5517f 100644
--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -652,19 +652,18 @@
return -EINVAL;
}
- up = kzalloc(sizeof(struct ar933x_uart_port), GFP_KERNEL);
+ up = devm_kzalloc(&pdev->dev, sizeof(struct ar933x_uart_port),
+ GFP_KERNEL);
if (!up)
return -ENOMEM;
port = &up->port;
+
+ port->membase = devm_ioremap_resource(&pdev->dev, mem_res);
+ if (IS_ERR(port->membase))
+ return PTR_ERR(port->membase);
+
port->mapbase = mem_res->start;
-
- port->membase = ioremap(mem_res->start, AR933X_UART_REGS_SIZE);
- if (!port->membase) {
- ret = -ENOMEM;
- goto err_free_up;
- }
-
port->line = id;
port->irq = irq_res->start;
port->dev = &pdev->dev;
@@ -686,16 +685,10 @@
ret = uart_add_one_port(&ar933x_uart_driver, &up->port);
if (ret)
- goto err_unmap;
+ return ret;
platform_set_drvdata(pdev, up);
return 0;
-
-err_unmap:
- iounmap(up->port.membase);
-err_free_up:
- kfree(up);
- return ret;
}
static int ar933x_uart_remove(struct platform_device *pdev)
@@ -704,11 +697,8 @@
up = platform_get_drvdata(pdev);
- if (up) {
+ if (up)
uart_remove_one_port(&ar933x_uart_driver, &up->port);
- iounmap(up->port.membase);
- kfree(up);
- }
return 0;
}