linux-kernel - [PATCH v1 1/6] ACPI: glue: Rearrange acpi_device

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Date:   Mon, 12 Jul 2021 19:23:32 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     "Rafael J. Wysocki" <rafael@...nel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Krogerus, Heikki" <heikki.krogerus@...ux.intel.com>
Subject: [PATCH v1 1/6] ACPI: glue: Rearrange acpi_device_notify()

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

Make the code flow in acpi_device_notify() more straightforward and
make it use dev_dbg() and acpi_handle_debug() for printing debug
messages.

The only expected functional impact of this change is the content of
the debug messages printed by acpi_device_notify().

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/glue.c |   30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

Index: linux-pm/drivers/acpi/glue.c
===================================================================
--- linux-pm.orig/drivers/acpi/glue.c
+++ linux-pm/drivers/acpi/glue.c
@@ -292,22 +292,21 @@ static int acpi_device_notify(struct dev
 	int ret;
 
 	ret = acpi_bind_one(dev, NULL);
-	if (ret && type) {
-		struct acpi_device *adev;
+	if (ret) {
+		if (!type)
+			goto err;
 
 		adev = type->find_companion(dev);
 		if (!adev) {
-			pr_debug("Unable to get handle for %s\n", dev_name(dev));
+			dev_dbg(dev, "ACPI companion not found\n");
 			ret = -ENODEV;
-			goto out;
+			goto err;
 		}
 		ret = acpi_bind_one(dev, adev);
 		if (ret)
-			goto out;
+			goto err;
 	}
 	adev = ACPI_COMPANION(dev);
-	if (!adev)
-		goto out;
 
 	if (dev_is_platform(dev))
 		acpi_configure_pmsi_domain(dev);
@@ -317,16 +316,13 @@ static int acpi_device_notify(struct dev
 	else if (adev->handler && adev->handler->bind)
 		adev->handler->bind(dev);
 
- out:
-	if (!ret) {
-		struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
-
-		acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
-		pr_debug("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
-		kfree(buffer.pointer);
-	} else {
-		pr_debug("Device %s -> No ACPI support\n", dev_name(dev));
-	}
+	acpi_handle_debug(ACPI_HANDLE(dev), "Bound to device %s\n",
+			  dev_name(dev));
+
+	return 0;
+
+err:
+	dev_dbg(dev, "No ACPI support\n");
 
 	return ret;
 }