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-rw-r--r--include/acpi/acpi_bus.h8
1 files changed, 5 insertions, 3 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 5de954e2b18a..e7796f373d0d 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -911,17 +911,19 @@ static inline bool acpi_int_uid_match(struct acpi_device *adev, u64 uid2)
* acpi_dev_hid_uid_match - Match device by supplied HID and UID
* @adev: ACPI device to match.
* @hid2: Hardware ID of the device.
- * @uid2: Unique ID of the device, pass 0 or NULL to not check _UID.
+ * @uid2: Unique ID of the device, pass NULL to not check _UID.
*
* Matches HID and UID in @adev with given @hid2 and @uid2. Absence of @uid2
* will be treated as a match. If user wants to validate @uid2, it should be
* done before calling this function.
*
- * Returns: %true if matches or @uid2 is 0 or NULL, %false otherwise.
+ * Returns: %true if matches or @uid2 is NULL, %false otherwise.
*/
#define acpi_dev_hid_uid_match(adev, hid2, uid2) \
(acpi_dev_hid_match(adev, hid2) && \
- (!(uid2) || acpi_dev_uid_match(adev, uid2)))
+ /* Distinguish integer 0 from NULL @uid2 */ \
+ (_Generic(uid2, ACPI_STR_TYPES(!(uid2)), default: 0) || \
+ acpi_dev_uid_match(adev, uid2)))
void acpi_dev_clear_dependencies(struct acpi_device *supplier);
bool acpi_dev_ready_for_enumeration(const struct acpi_device *device);