linux-kernel - Re: [PATCH v2 3/6] i2c: acpi: Factor out getting the IRQ from ACPI

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Date:   Tue, 28 May 2019 13:35:38 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Charles Keepax <ckeepax@...nsource.cirrus.com>
Cc:     wsa@...-dreams.de, jarkko.nikula@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, linux-i2c@...r.kernel.org,
        linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
        benjamin.tissoires@...hat.com, jbroadus@...il.com,
        patches@...nsource.cirrus.com
Subject: Re: [PATCH v2 3/6] i2c: acpi: Factor out getting the IRQ from ACPI

On Mon, May 27, 2019 at 04:19:29PM +0100, Charles Keepax wrote:
>  static int i2c_acpi_get_info(struct acpi_device *adev,
>  			     struct i2c_board_info *info,
>  			     struct i2c_adapter *adapter,
>  			     acpi_handle *adapter_handle)
>  {
> -	struct list_head resource_list;
>  	struct i2c_acpi_lookup lookup;
> -	int irq = -ENOENT;
>  	int ret;
>  
>  	memset(&lookup, 0, sizeof(lookup));
> @@ -186,16 +202,9 @@ static int i2c_acpi_get_info(struct acpi_device *adev,
>  		*adapter_handle = lookup.adapter_handle;
>  
>  	/* Then fill IRQ number if any */
> -	INIT_LIST_HEAD(&resource_list);
> -	ret = acpi_dev_get_resources(adev, &resource_list,
> -				     i2c_acpi_add_resource, &irq);
> -	if (ret < 0)
> -		return -EINVAL;
> -
> -	if (irq >= 0)
> -		info->irq = irq;
> -
> -	acpi_dev_free_resource_list(&resource_list);
> +	ret = i2c_acpi_get_irq(adev);
> +	if (ret >= 0)

Same comment here regarding irq == 0.