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Message-ID: <20241202055031.8038-10-mario.limonciello@amd.com>
Date: Sun, 1 Dec 2024 23:50:18 -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 v9 09/22] ACPI: platform_profile: Use `scoped_cond_guard`
Migrate away from using an interruptible mutex to scoped_cond_guard
in all functions. While changing, move the sysfs notification
used in platform_profile_store() outside of mutex scope.
Reviewed-by: Armin Wolf <W_Armin@....de>
Tested-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
Reviewed-by: Mark Pearson <mpearson-lenovo@...ebb.ca>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v9:
* Simplify platform_profile_choices_show()
---
drivers/acpi/platform_profile.c | 105 ++++++++++++--------------------
1 file changed, 38 insertions(+), 67 deletions(-)
diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index 9729543df6333..a1f0378f15e62 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -27,25 +27,16 @@ static ssize_t platform_profile_choices_show(struct device *dev,
char *buf)
{
int len = 0;
- int err, i;
-
- err = mutex_lock_interruptible(&profile_lock);
- if (err)
- return err;
+ int i;
- if (!cur_profile) {
- mutex_unlock(&profile_lock);
- return -ENODEV;
- }
-
- for_each_set_bit(i, cur_profile->choices, PLATFORM_PROFILE_LAST) {
- if (len == 0)
- len += sysfs_emit_at(buf, len, "%s", profile_names[i]);
- else
- len += sysfs_emit_at(buf, len, " %s", profile_names[i]);
+ scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
+ if (!cur_profile)
+ return -ENODEV;
+ for_each_set_bit(i, cur_profile->choices, PLATFORM_PROFILE_LAST)
+ len += sysfs_emit_at(buf, len, len ? " %s": "%s", profile_names[i]);
}
len += sysfs_emit_at(buf, len, "\n");
- mutex_unlock(&profile_lock);
+
return len;
}
@@ -56,20 +47,15 @@ static ssize_t platform_profile_show(struct device *dev,
enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED;
int err;
- err = mutex_lock_interruptible(&profile_lock);
- if (err)
- return err;
+ scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
+ if (!cur_profile)
+ return -ENODEV;
- if (!cur_profile) {
- mutex_unlock(&profile_lock);
- return -ENODEV;
+ err = cur_profile->profile_get(cur_profile, &profile);
+ if (err)
+ return err;
}
- err = cur_profile->profile_get(cur_profile, &profile);
- mutex_unlock(&profile_lock);
- if (err)
- return err;
-
/* Check that profile is valid index */
if (WARN_ON((profile < 0) || (profile >= ARRAY_SIZE(profile_names))))
return -EIO;
@@ -88,28 +74,21 @@ static ssize_t platform_profile_store(struct device *dev,
if (i < 0)
return -EINVAL;
- err = mutex_lock_interruptible(&profile_lock);
- if (err)
- return err;
+ scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
+ if (!cur_profile)
+ return -ENODEV;
- if (!cur_profile) {
- mutex_unlock(&profile_lock);
- return -ENODEV;
- }
+ /* Check that platform supports this profile choice */
+ if (!test_bit(i, cur_profile->choices))
+ return -EOPNOTSUPP;
- /* Check that platform supports this profile choice */
- if (!test_bit(i, cur_profile->choices)) {
- mutex_unlock(&profile_lock);
- return -EOPNOTSUPP;
+ err = cur_profile->profile_set(cur_profile, i);
+ if (err)
+ return err;
}
- err = cur_profile->profile_set(cur_profile, i);
- if (!err)
- sysfs_notify(acpi_kobj, NULL, "platform_profile");
+ sysfs_notify(acpi_kobj, NULL, "platform_profile");
- mutex_unlock(&profile_lock);
- if (err)
- return err;
return count;
}
@@ -140,36 +119,28 @@ int platform_profile_cycle(void)
enum platform_profile_option next;
int err;
- err = mutex_lock_interruptible(&profile_lock);
- if (err)
- return err;
+ scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) {
+ if (!cur_profile)
+ return -ENODEV;
- if (!cur_profile) {
- mutex_unlock(&profile_lock);
- return -ENODEV;
- }
+ err = cur_profile->profile_get(cur_profile, &profile);
+ if (err)
+ return err;
- err = cur_profile->profile_get(cur_profile, &profile);
- if (err) {
- mutex_unlock(&profile_lock);
- return err;
- }
+ next = find_next_bit_wrap(cur_profile->choices, PLATFORM_PROFILE_LAST,
+ profile + 1);
- next = find_next_bit_wrap(cur_profile->choices, PLATFORM_PROFILE_LAST,
- profile + 1);
+ if (WARN_ON(next == PLATFORM_PROFILE_LAST))
+ return -EINVAL;
- if (WARN_ON(next == PLATFORM_PROFILE_LAST)) {
- mutex_unlock(&profile_lock);
- return -EINVAL;
+ err = cur_profile->profile_set(cur_profile, next);
+ if (err)
+ return err;
}
- err = cur_profile->profile_set(cur_profile, next);
- mutex_unlock(&profile_lock);
-
- if (!err)
- sysfs_notify(acpi_kobj, NULL, "platform_profile");
+ sysfs_notify(acpi_kobj, NULL, "platform_profile");
- return err;
+ return 0;
}
EXPORT_SYMBOL_GPL(platform_profile_cycle);
--
2.43.0
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