linux-kernel - Re: [PATCH] IIO: Adds ACPI support for ST gyroscopes

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Date:	Wed, 25 Mar 2015 19:08:55 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	sathyanarayanan.kuppuswamy@...ux.intel.com,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Linus Walleij <linus.walleij@...aro.org>
CC:	Robert Dolca <robert.dolca@...il.com>,
	Robert Dolca <robert.dolca@...el.com>,
	"linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Denis CIOCCA <denis.ciocca@...com>
Subject: Re: [PATCH] IIO: Adds ACPI support for ST gyroscopes

On 03/25/2015 07:05 PM, sathyanarayanan kuppuswamy wrote:
>>   static acpi_status
>>   acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address,
>>                   u32 bits, u64 *value, void *handler_context,
>> diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
>> index edf274cabe81..c12a3f24ada4 100644
>> --- a/drivers/i2c/i2c-core.c
>> +++ b/drivers/i2c/i2c-core.c
>> @@ -629,8 +629,13 @@ static int i2c_device_probe(struct device *dev)
>>       if (!client)
>>           return 0;
>> -    if (!client->irq && dev->of_node) {
>> -        int irq = of_irq_get(dev->of_node, 0);
>> +    if (client->irq <= 0) {
> Isn't irq 0 a valid interrupt number ? Shouldn't it be client->irq < 0 ?

0 is a invalid interrupt number these days, and is typically used to 
indicate no IRQ.

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