linux-kernel - [PATCH v7 06/22] ACPI: platform_profile: Move sanity check out of the mutex

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Message-ID: <20241119171739.77028-7-mario.limonciello@amd.com>
Date: Tue, 19 Nov 2024 11:17:23 -0600
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>, Armin Wolf <W_Armin@....de>
Subject: [PATCH v7 06/22] ACPI: platform_profile: Move sanity check out of the mutex

The sanity check that the platform handler had choices set doesn't
need the mutex taken.  Move it to earlier in the registration.

Tested-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
Tested-by: Matthew Schwartz <matthew.schwartz@...ux.dev>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Reviewed-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
Reviewed-by: Armin Wolf <W_Armin@....de>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v5:
 * Add tag
---
 drivers/acpi/platform_profile.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index 927a2f7456c9a..4f5623fc27c09 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -179,6 +179,13 @@ int platform_profile_register(struct platform_profile_handler *pprof)
 {
 	int err;
 
+	/* Sanity check the profile handler */
+	if (!pprof || bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST) ||
+	    !pprof->profile_set || !pprof->profile_get) {
+		pr_err("platform_profile: handler is invalid\n");
+		return -EINVAL;
+	}
+
 	mutex_lock(&profile_lock);
 	/* We can only have one active profile */
 	if (cur_profile) {
@@ -186,13 +193,6 @@ int platform_profile_register(struct platform_profile_handler *pprof)
 		return -EEXIST;
 	}
 
-	/* Sanity check the profile handler field are set */
-	if (!pprof || bitmap_empty(pprof->choices, PLATFORM_PROFILE_LAST) ||
-		!pprof->profile_set || !pprof->profile_get) {
-		mutex_unlock(&profile_lock);
-		return -EINVAL;
-	}
-
 	err = sysfs_create_group(acpi_kobj, &platform_profile_group);
 	if (err) {
 		mutex_unlock(&profile_lock);
-- 
2.43.0