linux-kernel - [PATCH v3 10/22] ACPI: platform_profile: Use `scoped_cond_guard` for platform_profile

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Message-ID: <20241031040952.109057-11-mario.limonciello@amd.com>
Date: Wed, 30 Oct 2024 23:09:40 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Hans de Goede <hdegoede@...hat.com>, Ilpo Järvinen
	<ilpo.jarvinen@...ux.intel.com>
CC: "Rafael J . Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>,
	Maximilian Luz <luzmaximilian@...il.com>, Lee Chun-Yi <jlee@...e.com>, "Shyam
 Sundar S K" <Shyam-sundar.S-k@....com>, Corentin Chary
	<corentin.chary@...il.com>, "Luke D . Jones" <luke@...nes.dev>, Ike Panhc
	<ike.pan@...onical.com>, Henrique de Moraes Holschuh <hmh@....eng.br>,
	"Alexis Belmonte" <alexbelm48@...il.com>, Uwe Kleine-König
	<u.kleine-koenig@...gutronix.de>, Ai Chao <aichao@...inos.cn>, Gergo Koteles
	<soyer@....hu>, open list <linux-kernel@...r.kernel.org>, "open list:ACPI"
	<linux-acpi@...r.kernel.org>, "open list:MICROSOFT SURFACE PLATFORM PROFILE
 DRIVER" <platform-driver-x86@...r.kernel.org>, "open list:THINKPAD ACPI
 EXTRAS DRIVER" <ibm-acpi-devel@...ts.sourceforge.net>, Mark Pearson
	<mpearson-lenovo@...ebb.ca>, Matthew Schwartz <matthew.schwartz@...ux.dev>,
	Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v3 10/22] ACPI: platform_profile: Use `scoped_cond_guard` for platform_profile_show()

Migrate away from using an interruptible mutex to scoped_cond_guard.
Also move the sysfs string match out of the mutex as it's not needed.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 drivers/acpi/platform_profile.c | 36 ++++++++++++---------------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index b48dd34301f13..63a5f5ac33898 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -75,35 +75,25 @@ static ssize_t platform_profile_store(struct device *dev,
 {
 	int err, i;
 
-	err = mutex_lock_interruptible(&profile_lock);
-	if (err)
-		return err;
-
-	if (!cur_profile) {
-		mutex_unlock(&profile_lock);
-		return -ENODEV;
-	}
-
 	/* Scan for a matching profile */
 	i = sysfs_match_string(profile_names, buf);
-	if (i < 0) {
-		mutex_unlock(&profile_lock);
+	if (i < 0)
 		return -EINVAL;
-	}
 
-	/* Check that platform supports this profile choice */
-	if (!test_bit(i, cur_profile->choices)) {
-		mutex_unlock(&profile_lock);
-		return -EOPNOTSUPP;
-	}
+	scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
+		if (!cur_profile)
+			return -ENODEV;
 
-	err = cur_profile->profile_set(cur_profile, i);
-	if (!err)
-		sysfs_notify(acpi_kobj, NULL, "platform_profile");
+		/* Check that platform supports this profile choice */
+		if (!test_bit(i, cur_profile->choices))
+			return -EOPNOTSUPP;
 
-	mutex_unlock(&profile_lock);
-	if (err)
-		return err;
+		err = cur_profile->profile_set(cur_profile, i);
+		if (err)
+			return err;
+	}
+
+	sysfs_notify(acpi_kobj, NULL, "platform_profile");
 	return count;
 }
 
-- 
2.43.0