From a3a62ca256ab1d1ba771ee243ec4a8e8b7856f08 Mon Sep 17 00:00:00 2001 From: Raag Jadav Date: Tue, 24 Oct 2023 11:50:13 +0530 Subject: [PATCH] ACPI: utils: Introduce acpi_dev_uid_match() for matching _UID Introduce acpi_dev_uid_match() helper that matches the device with supplied _UID string. Signed-off-by: Raag Jadav Reviewed-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki --- drivers/acpi/utils.c | 31 +++++++++++++++++++++++++++---- include/acpi/acpi_bus.h | 1 + include/linux/acpi.h | 5 +++++ 3 files changed, 33 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c index 2ea14648a661f..07ee0d23a1889 100644 --- a/drivers/acpi/utils.c +++ b/drivers/acpi/utils.c @@ -768,20 +768,43 @@ bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs) } EXPORT_SYMBOL(acpi_check_dsm); +/** + * acpi_dev_uid_match - Match device by supplied UID + * @adev: ACPI device to match. + * @uid2: Unique ID of the device. + * + * Matches UID in @adev with given @uid2. + * + * Returns: + * - %true if matches. + * - %false otherwise. + */ +bool acpi_dev_uid_match(struct acpi_device *adev, const char *uid2) +{ + const char *uid1 = acpi_device_uid(adev); + + return uid1 && uid2 && !strcmp(uid1, uid2); +} +EXPORT_SYMBOL_GPL(acpi_dev_uid_match); + /** * 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 NULL to not check _UID. * - * Matches HID and UID in @adev with given @hid2 and @uid2. - * Returns true if matches. + * 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 NULL. + * - %false otherwise. */ bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2) { const char *hid1 = acpi_device_hid(adev); - const char *uid1 = acpi_device_uid(adev); if (strcmp(hid1, hid2)) return false; @@ -789,7 +812,7 @@ bool acpi_dev_hid_uid_match(struct acpi_device *adev, if (!uid2) return true; - return uid1 && !strcmp(uid1, uid2); + return acpi_dev_uid_match(adev, uid2); } EXPORT_SYMBOL(acpi_dev_hid_uid_match); diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h index 254685085c825..d1fe6446ffe0b 100644 --- a/include/acpi/acpi_bus.h +++ b/include/acpi/acpi_bus.h @@ -760,6 +760,7 @@ static inline bool acpi_device_can_poweroff(struct acpi_device *adev) adev->power.states[ACPI_STATE_D3_HOT].flags.explicit_set); } +bool acpi_dev_uid_match(struct acpi_device *adev, const char *uid2); bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2); int acpi_dev_uid_to_integer(struct acpi_device *adev, u64 *integer); diff --git a/include/linux/acpi.h b/include/linux/acpi.h index afd94c9b8b8af..db3a33e19c974 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -787,6 +787,11 @@ static inline bool acpi_dev_present(const char *hid, const char *uid, s64 hrv) struct acpi_device; +static inline bool acpi_dev_uid_match(struct acpi_device *adev, const char *uid2) +{ + return false; +} + static inline bool acpi_dev_hid_uid_match(struct acpi_device *adev, const char *hid2, const char *uid2) { -- 2.30.2