linux-kernel - Re: [PATCH 1/2] ACPI, PCI, ISA: Call ISA-specific code only for architectures which support ISA.

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Date:	Wed, 19 Feb 2014 11:28:06 +0100
From:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
CC:	lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] ACPI, PCI, ISA: Call ISA-specific code only for architectures
 which support ISA.



On 15.02.2014 02:05, Rafael J. Wysocki wrote:
> On Monday, February 10, 2014 02:00:10 PM Tomasz Nowicki wrote:
>> This commit enables ISA-specific code if and only if CONFIG_{E}ISA is set
>> in the kernel configuration so that we do not have to maintain
>> acpi_isa_irq_to_gsi() function for architectures which do not support ISA.
>>
>> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
>> ---
>>   drivers/acpi/pci_irq.c |    8 ++++----
>>   1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
>> index 41c5e1b..b0e31b6 100644
>> --- a/drivers/acpi/pci_irq.c
>> +++ b/drivers/acpi/pci_irq.c
>> @@ -418,6 +418,7 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
>>   	 * driver reported one, then use it. Exit in any case.
>>   	 */
>>   	if (gsi < 0) {
>> +#if IS_ENABLED(CONFIG_ISA) || IS_ENABLED(CONFIG_EISA)
>
> Can you please move the code in question into a separate function and make
> that function depend on the above (with an empty stub for when they are not
> enabled)?
Thanks for suggestion, I will resend as next version.
>
>>   		u32 dev_gsi;
>>   		/* Interrupt Line values above 0xF are forbidden */
>>   		if (dev->irq > 0 && (dev->irq <= 0xF) &&
>> @@ -427,10 +428,9 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
>>   			acpi_register_gsi(&dev->dev, dev_gsi,
>>   					  ACPI_LEVEL_SENSITIVE,
>>   					  ACPI_ACTIVE_LOW);
>> -		} else {
>> -			dev_warn(&dev->dev, "PCI INT %c: no GSI\n",
>> -				 pin_name(pin));
>> -		}
>> +		} else
>> +#endif
>> +		dev_warn(&dev->dev, "PCI INT %c: no GSI\n", pin_name(pin));
>>
>>   		return 0;
>>   	}
>>
>
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