linux-kernel - [PATCH v1 1/4] ACPI: OSL: Rework error handling in acpi_os

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Date:   Wed, 29 Nov 2023 14:46:51 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Michal Wilczynski <michal.wilczynski@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v1 1/4] ACPI: OSL: Rework error handling in acpi_os_execute()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Reduce the number of checks and goto labels related to error handling
in acpi_os_execute() and drop the status local variable, which turns
out to be redundant, from it.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/osl.c |   23 ++++++++++-------------
 1 file changed, 10 insertions(+), 13 deletions(-)

Index: linux-pm/drivers/acpi/osl.c
===================================================================
--- linux-pm.orig/drivers/acpi/osl.c
+++ linux-pm/drivers/acpi/osl.c
@@ -1060,7 +1060,6 @@ int __init acpi_debugger_init(void)
 acpi_status acpi_os_execute(acpi_execute_type type,
 			    acpi_osd_exec_callback function, void *context)
 {
-	acpi_status status = AE_OK;
 	struct acpi_os_dpc *dpc;
 	struct workqueue_struct *queue;
 	int ret;
@@ -1073,9 +1072,9 @@ acpi_status acpi_os_execute(acpi_execute
 		ret = acpi_debugger_create_thread(function, context);
 		if (ret) {
 			pr_err("Kernel thread creation failed\n");
-			status = AE_ERROR;
+			return AE_ERROR;
 		}
-		goto out_thread;
+		return AE_OK;
 	}
 
 	/*
@@ -1107,12 +1106,9 @@ acpi_status acpi_os_execute(acpi_execute
 		INIT_WORK(&dpc->work, acpi_os_execute_deferred);
 	} else {
 		pr_err("Unsupported os_execute type %d.\n", type);
-		status = AE_ERROR;
+		goto err;
 	}
 
-	if (ACPI_FAILURE(status))
-		goto err_workqueue;
-
 	/*
 	 * On some machines, a software-initiated SMI causes corruption unless
 	 * the SMI runs on CPU 0.  An SMI can be initiated by any AML, but
@@ -1123,13 +1119,14 @@ acpi_status acpi_os_execute(acpi_execute
 	ret = queue_work_on(0, queue, &dpc->work);
 	if (!ret) {
 		pr_err("Unable to queue work\n");
-		status = AE_ERROR;
+		goto err;
 	}
-err_workqueue:
-	if (ACPI_FAILURE(status))
-		kfree(dpc);
-out_thread:
-	return status;
+
+	return AE_OK;
+
+err:
+	kfree(dpc);
+	return AE_ERROR;
 }
 EXPORT_SYMBOL(acpi_os_execute);