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i2c: acpi: Return -ENOENT when no resources found in i2c_acpi_client_count()

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Some users want to return an error to the upper layers when
i2c_acpi_client_count() returns 0. Follow the common pattern
in such cases, i.e. return -ENOENT instead of 0.

While at it, fix the kernel-doc warning about missing return value
description.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Andy Shevchenko 2025-11-25 10:40:11 +01:00 committed by Andi Shyti
parent f105c7a1be
commit 5351cf8e96
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GPG Key ID: DA78056626D32D6E
1 changed files with 5 additions and 2 deletions
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7
drivers/i2c/i2c-core-acpi.c
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@ -84,8 +84,11 @@ static int i2c_acpi_resource_count(struct acpi_resource *ares, void *data)
* i2c_acpi_client_count - Count the number of I2cSerialBus resources
* @adev: ACPI device
*
* Returns the number of I2cSerialBus resources in the ACPI-device's
* Return:
* The number of I2cSerialBus resources in the ACPI-device's
* resource-list; or a negative error code.
*
* Specifically returns -ENOENT when no resources found.
*/
int i2c_acpi_client_count(struct acpi_device *adev)
{
@ -97,7 +100,7 @@ int i2c_acpi_client_count(struct acpi_device *adev)
return ret;
acpi_dev_free_resource_list(&r);
return count;
return count ?: -ENOENT;
}
EXPORT_SYMBOL_GPL(i2c_acpi_client_count);