netdev - Re: [PATCH RFC V2 2/6] net: bcmgenet: Avoid touching non-existent interrupt

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Date:   Sun, 3 Nov 2019 10:36:39 +0100
From:   Stefan Wahren <wahrenst@....net>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...nel.org>,
        Matthias Brugger <mbrugger@...e.com>,
        "David S . Miller" <davem@...emloft.net>
Cc:     Doug Berger <opendmb@...il.com>, netdev@...r.kernel.org,
        Eric Anholt <eric@...olt.net>,
        bcm-kernel-feedback-list@...adcom.com,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH RFC V2 2/6] net: bcmgenet: Avoid touching non-existent
 interrupt

Am 02.11.19 um 20:34 schrieb Florian Fainelli:
> On 11/2/2019 6:41 AM, Stefan Wahren wrote:
>> As platform_get_irq() now prints an error when the interrupt does not
>> exist, we are getting a confusing error message in case the optional
>> WOL IRQ is not defined:
>>
>>   bcmgenet fd58000.ethernet: IRQ index 2 not found
>>
>> Fix this by using the platform_irq_count() helper to avoid touching a
>> non-existent interrupt.
>>
>> Fixes: 7723f4c5ecdb8d83 ("driver core: platform: Add an error message to platform_get_irq*()")
>> Signed-off-by: Stefan Wahren <wahrenst@....net>
>> ---
>>  drivers/net/ethernet/broadcom/genet/bcmgenet.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
>> index 105b3be..ac554a6 100644
>> --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
>> +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
>> @@ -3473,7 +3473,8 @@ static int bcmgenet_probe(struct platform_device *pdev)
>>  		err = priv->irq1;
>>  		goto err;
>>  	}
>> -	priv->wol_irq = platform_get_irq(pdev, 2);
>> +	if (platform_irq_count(pdev) > 2)
>> +		priv->wol_irq = platform_get_irq(pdev, 2);
> Or you could use platform_get_irq_optional() for the WoL IRQ line?
Yes, this would be better.