[PATCH 5.10.y] ACPI: scan: Use acpi_dev_put() in object add error paths

[Sasha Levin <sashal@kernel.org>]

From: Guangshuo Li <lgs201920130244@gmail.com>

[ Upstream commit 9c0acc169ac71535477caedea8315f7041c5f07c ]

After acpi_init_device_object(), the lifetime of struct acpi_device is
managed by the driver core through reference counting.

Both acpi_add_power_resource() and acpi_add_single_object() call
acpi_init_device_object() and then invoke acpi_device_add(). If that
fails, their error paths call the release callback directly instead of
dropping the device reference through acpi_dev_put().

This bypasses the normal device lifetime rules and frees the object
without releasing the reference acquired by device_initialize(), which
may lead to a refcount leak.

The issue was identified by a static analysis tool I developed and
confirmed by manual review.

Fix both error paths by using acpi_dev_put() and let the release
callback handle the final cleanup.

Fixes: 781d737c7466 ("ACPI: Drop power resources driver")
Fixes: 718fb0de8ff88 ("ACPI: fix NULL bug for HID/UID string")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Guangshuo Li <lgs201920130244@gmail.com>
Link: https://patch.msgid.link/20260413135343.2884481-1-lgs201920130244@gmail.com
Signed-off-by: Rafael J. Wysocki <rjw@rjwysocki.net>
[ preserved 5.10's `return result;` instead of upstream's `return NULL;` since the function returns int ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/acpi/power.c | 2 +-
 drivers/acpi/scan.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 61115ed8b93fb..b00bb1b899e78 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -977,7 +977,7 @@ int acpi_add_power_resource(acpi_handle handle)
 	return 0;
 
  err:
-	acpi_release_power_resource(&device->dev);
+	acpi_dev_put(device);
 	return result;
 }
 
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f17f48bc13bc0..08a43d1393e0e 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1679,7 +1679,7 @@ static int acpi_add_single_object(struct acpi_device **child,
 
 	result = acpi_device_add(device, acpi_device_release);
 	if (result) {
-		acpi_device_release(&device->dev);
+		acpi_dev_put(device);
 		return result;
 	}
 
-- 
2.53.0