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SubjectRe: [PATCH] tty: serial: imx: Add return value check for platform_get_irq()
Hello Anson,

On Mon, May 11, 2020 at 03:09:56PM +0800, Anson Huang wrote:
> RX irq is required, so add return value check for platform_get_irq().
>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> ---
> drivers/tty/serial/imx.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
> index f4d6810..f4023d9 100644
> --- a/drivers/tty/serial/imx.c
> +++ b/drivers/tty/serial/imx.c
> @@ -2252,6 +2252,8 @@ static int imx_uart_probe(struct platform_device *pdev)
> return PTR_ERR(base);
>
> rxirq = platform_get_irq(pdev, 0);
> + if (rxirq < 0)
> + return rxirq;
> txirq = platform_get_irq_optional(pdev, 1);
> rtsirq = platform_get_irq_optional(pdev, 2);

I'm not sure we need such a check as devm_request_irq fails if the
return value of platform_get_irq() is bogus.

But if we decide this construct is good enough, the error reporting
needs some love as currently it emits two error messages which is
confusing.

Best regards
Uwe

--
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | https://www.pengutronix.de/ |

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