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serial: mxs-auart: Don't check for mctrl_gpio_to_gpiod() returning error

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Since commit 1d267ea653 ("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 445df7ff3f ("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/20190814092924.13857-3-geert+renesas@glider.be
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Geert Uytterhoeven 2019-08-14 11:29:23 +02:00 committed by Greg Kroah-Hartman
parent a16c4c5a9c
commit 6cbdf5c659
1 changed files with 2 additions and 4 deletions
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6
drivers/tty/serial/mxs-auart.c
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@ -969,10 +969,8 @@ static int mxs_auart_dma_init(struct mxs_auart_port *s)
}
#define RTS_AT_AUART() IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(s->gpios, \
UART_GPIO_RTS))
#define CTS_AT_AUART() IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(s->gpios, \
UART_GPIO_CTS))
#define RTS_AT_AUART() !mctrl_gpio_to_gpiod(s->gpios, UART_GPIO_RTS)
#define CTS_AT_AUART() !mctrl_gpio_to_gpiod(s->gpios, UART_GPIO_CTS)
static void mxs_auart_settermios(struct uart_port *u,
struct ktermios *termios,
struct ktermios *old)