serial: sh-sci: Don't check for mctrl_gpio_to_gpiod() returning error

Since commit 1d267ea6539f2663 ("serial: mctrl-gpio: simplify init
routine"), mctrl_gpio_init() returns failure if the assignment to any
member of the gpio array results in an error pointer.
Since commit c359522194593815 ("serial: mctrl_gpio: Avoid probe failures
in case of missing gpiolib"), mctrl_gpio_to_gpiod() returns NULL in the
!CONFIG_GPIOLIB case.
Hence there is no longer a need to check for mctrl_gpio_to_gpiod()
returning an error value.  A simple NULL check is sufficient.

This follows the spirit of commit 445df7ff3fd1a0a9 ("serial: mctrl-gpio:
drop usages of IS_ERR_OR_NULL") in the mctrl-gpio core.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20190814092924.13857-4-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 7f565fcbf1ca4c5ef6d52917f801e7f20e725d2e..4e754a4850e6db63e1693edb04113b2e72e44a0e 100644 (file)
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2099,12 +2099,12 @@ static unsigned int sci_get_mctrl(struct uart_port *port)
        if (s->autorts) {
                if (sci_get_cts(port))
                        mctrl |= TIOCM_CTS;
-       } else if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_CTS))) {
+       } else if (!mctrl_gpio_to_gpiod(gpios, UART_GPIO_CTS)) {
                mctrl |= TIOCM_CTS;
        }
-       if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_DSR)))
+       if (!mctrl_gpio_to_gpiod(gpios, UART_GPIO_DSR))
                mctrl |= TIOCM_DSR;
-       if (IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(gpios, UART_GPIO_DCD)))
+       if (!mctrl_gpio_to_gpiod(gpios, UART_GPIO_DCD))
                mctrl |= TIOCM_CAR;
 
        return mctrl;
@@ -3285,10 +3285,8 @@ static int sci_probe_single(struct platform_device *dev,
                return PTR_ERR(sciport->gpios);
 
        if (sciport->has_rtscts) {
-               if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(sciport->gpios,
-                                                       UART_GPIO_CTS)) ||
-                   !IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(sciport->gpios,
-                                                       UART_GPIO_RTS))) {
+               if (mctrl_gpio_to_gpiod(sciport->gpios, UART_GPIO_CTS) ||
+                   mctrl_gpio_to_gpiod(sciport->gpios, UART_GPIO_RTS)) {
                        dev_err(&dev->dev, "Conflicting RTS/CTS config\n");
                        return -EINVAL;
                }