netdev - Re: [PATCH] net: smc91x: propagate irq return code

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Message-ID: <56AF514D.6010608@cogentembedded.com>
Date:	Mon, 1 Feb 2016 15:36:29 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Nicolas Pitre <nico@...xnic.net>,
	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: smc91x: propagate irq return code

Hello.

On 2/1/2016 1:46 AM, Robert Jarzmik wrote:

> The smc91x driver doesn't honor the probe deferral mechanism when the
> interrupt source is not yet available, such as one provided by a gpio
> controller not probed.
>
> Fix this by propagating the platform_get_irq() error code as the probe
> return value.
>
> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
> ---
>   drivers/net/ethernet/smsc/smc91x.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c
> index 0e2fc1a844ab..43ab7aa31a79 100644
> --- a/drivers/net/ethernet/smsc/smc91x.c
> +++ b/drivers/net/ethernet/smsc/smc91x.c
> @@ -2343,7 +2343,7 @@ static int smc_drv_probe(struct platform_device *pdev)
>
>   	ndev->irq = platform_get_irq(pdev, 0);
>   	if (ndev->irq <= 0) {
> -		ret = -ENODEV;
> +		ret = ndev->irq;

    What if 'ndev->irq' does equal 0?

MBR, Sergei