107 lines
3.1 KiB
Diff
107 lines
3.1 KiB
Diff
From d1b9e1391ab2dc80e9db87fe8b2de015c651e4c9 Mon Sep 17 00:00:00 2001
|
|
From: Christian Marangi <ansuelsmth@gmail.com>
|
|
Date: Wed, 19 Apr 2023 23:07:43 +0200
|
|
Subject: [PATCH 5/5] leds: trigger: netdev: Use mutex instead of spinlocks
|
|
|
|
Some LEDs may require to sleep while doing some operation like setting
|
|
brightness and other cleanup.
|
|
|
|
For this reason, using a spinlock will cause a sleep under spinlock
|
|
warning.
|
|
|
|
It should be safe to convert this to a sleepable lock since:
|
|
- sysfs read/write can sleep
|
|
- netdev_trig_work is a work queue and can sleep
|
|
- netdev _trig_notify can sleep
|
|
|
|
The spinlock was used when brightness didn't support sleeping, but this
|
|
changed and now it supported with brightness_set_blocking().
|
|
|
|
Convert to mutex lock to permit sleeping using brightness_set_blocking().
|
|
|
|
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
|
|
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
|
|
Signed-off-by: Lee Jones <lee@kernel.org>
|
|
Link: https://lore.kernel.org/r/20230419210743.3594-6-ansuelsmth@gmail.com
|
|
---
|
|
drivers/leds/trigger/ledtrig-netdev.c | 18 +++++++++---------
|
|
1 file changed, 9 insertions(+), 9 deletions(-)
|
|
|
|
--- a/drivers/leds/trigger/ledtrig-netdev.c
|
|
+++ b/drivers/leds/trigger/ledtrig-netdev.c
|
|
@@ -20,7 +20,7 @@
|
|
#include <linux/list.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netdevice.h>
|
|
-#include <linux/spinlock.h>
|
|
+#include <linux/mutex.h>
|
|
#include <linux/timer.h>
|
|
#include "../leds.h"
|
|
|
|
@@ -37,7 +37,7 @@
|
|
*/
|
|
|
|
struct led_netdev_data {
|
|
- spinlock_t lock;
|
|
+ struct mutex lock;
|
|
|
|
struct delayed_work work;
|
|
struct notifier_block notifier;
|
|
@@ -97,9 +97,9 @@ static ssize_t device_name_show(struct d
|
|
struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
|
|
ssize_t len;
|
|
|
|
- spin_lock_bh(&trigger_data->lock);
|
|
+ mutex_lock(&trigger_data->lock);
|
|
len = sprintf(buf, "%s\n", trigger_data->device_name);
|
|
- spin_unlock_bh(&trigger_data->lock);
|
|
+ mutex_unlock(&trigger_data->lock);
|
|
|
|
return len;
|
|
}
|
|
@@ -115,7 +115,7 @@ static ssize_t device_name_store(struct
|
|
|
|
cancel_delayed_work_sync(&trigger_data->work);
|
|
|
|
- spin_lock_bh(&trigger_data->lock);
|
|
+ mutex_lock(&trigger_data->lock);
|
|
|
|
if (trigger_data->net_dev) {
|
|
dev_put(trigger_data->net_dev);
|
|
@@ -138,7 +138,7 @@ static ssize_t device_name_store(struct
|
|
trigger_data->last_activity = 0;
|
|
|
|
set_baseline_state(trigger_data);
|
|
- spin_unlock_bh(&trigger_data->lock);
|
|
+ mutex_unlock(&trigger_data->lock);
|
|
|
|
return size;
|
|
}
|
|
@@ -279,7 +279,7 @@ static int netdev_trig_notify(struct not
|
|
|
|
cancel_delayed_work_sync(&trigger_data->work);
|
|
|
|
- spin_lock_bh(&trigger_data->lock);
|
|
+ mutex_lock(&trigger_data->lock);
|
|
|
|
trigger_data->carrier_link_up = false;
|
|
switch (evt) {
|
|
@@ -304,7 +304,7 @@ static int netdev_trig_notify(struct not
|
|
|
|
set_baseline_state(trigger_data);
|
|
|
|
- spin_unlock_bh(&trigger_data->lock);
|
|
+ mutex_unlock(&trigger_data->lock);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
@@ -365,7 +365,7 @@ static int netdev_trig_activate(struct l
|
|
if (!trigger_data)
|
|
return -ENOMEM;
|
|
|
|
- spin_lock_init(&trigger_data->lock);
|
|
+ mutex_init(&trigger_data->lock);
|
|
|
|
trigger_data->notifier.notifier_call = netdev_trig_notify;
|
|
trigger_data->notifier.priority = 10;
|