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Message-ID: <20241105153316.378-7-mario.limonciello@amd.com>
Date: Tue, 5 Nov 2024 09:33:02 -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>
Subject: [PATCH v4 06/20] ACPI: platform_profile: Move matching string for new profile out of mutex
Holding the mutex is not necessary while scanning the string passed into
platform_profile_store().
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
drivers/acpi/platform_profile.c | 12 +++++-------
1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index 4e8a155589c21..70e7f1ba68676 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -83,6 +83,11 @@ static ssize_t platform_profile_store(struct device *dev,
{
int err, i;
+ /* Scan for a matching profile */
+ i = sysfs_match_string(profile_names, buf);
+ if (i < 0)
+ return -EINVAL;
+
err = mutex_lock_interruptible(&profile_lock);
if (err)
return err;
@@ -92,13 +97,6 @@ static ssize_t platform_profile_store(struct device *dev,
return -ENODEV;
}
- /* Scan for a matching profile */
- i = sysfs_match_string(profile_names, buf);
- if (i < 0) {
- mutex_unlock(&profile_lock);
- return -EINVAL;
- }
-
/* Check that platform supports this profile choice */
if (!test_bit(i, cur_profile->choices)) {
mutex_unlock(&profile_lock);
--
2.43.0
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