[PATCH v1 1/2] i2c: acpi: Return -ENOENT when no resources found in i2c_acpi_client_count()

Andy Shevchenko
2025-11-25T09:42:56Z

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>
---
drivers/i2c/i2c-core-acpi.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index ed90858a27b7..a7d36f8d7f2f 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -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);

--
2.50.1