linux-kernel - [PATCH v1 4/7] ACPI: scan: Use list_first_entry_or_null() in acpi_device

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Date: Mon, 25 Mar 2024 14:33:00 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	acpica-devel@...ts.linux.dev
Cc: "Rafael J. Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Robert Moore <robert.moore@...el.com>
Subject: [PATCH v1 4/7] ACPI: scan: Use list_first_entry_or_null() in acpi_device_hid()

To replace list_empty() + list_first_entry() pair to simplify code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/acpi/scan.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 5e4118970285..f5581d3701f1 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1296,10 +1296,10 @@ const char *acpi_device_hid(struct acpi_device *device)
 {
 	struct acpi_hardware_id *hid;
 
-	if (list_empty(&device->pnp.ids))
+	hid = list_first_entry_or_null(&device->pnp.ids, struct acpi_hardware_id, list);
+	if (!hid)
 		return dummy_hid;
 
-	hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list);
 	return hid->id;
 }
 EXPORT_SYMBOL(acpi_device_hid);
-- 
2.43.0.rc1.1.gbec44491f096