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8a9273d51e
Copy backport, hack, pending patch and config from 6.1 to 6.6. Signed-off-by: Weijie Gao <hackpascal@gmail.com>
107 lines
3.1 KiB
Diff
107 lines
3.1 KiB
Diff
From d1b9e1391ab2dc80e9db87fe8b2de015c651e4c9 Mon Sep 17 00:00:00 2001
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From: Christian Marangi <ansuelsmth@gmail.com>
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Date: Wed, 19 Apr 2023 23:07:43 +0200
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Subject: [PATCH 5/5] leds: trigger: netdev: Use mutex instead of spinlocks
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Some LEDs may require to sleep while doing some operation like setting
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brightness and other cleanup.
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For this reason, using a spinlock will cause a sleep under spinlock
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warning.
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It should be safe to convert this to a sleepable lock since:
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- sysfs read/write can sleep
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- netdev_trig_work is a work queue and can sleep
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- netdev _trig_notify can sleep
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The spinlock was used when brightness didn't support sleeping, but this
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changed and now it supported with brightness_set_blocking().
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Convert to mutex lock to permit sleeping using brightness_set_blocking().
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Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
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Reviewed-by: Andrew Lunn <andrew@lunn.ch>
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Signed-off-by: Lee Jones <lee@kernel.org>
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Link: https://lore.kernel.org/r/20230419210743.3594-6-ansuelsmth@gmail.com
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---
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drivers/leds/trigger/ledtrig-netdev.c | 18 +++++++++---------
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1 file changed, 9 insertions(+), 9 deletions(-)
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--- a/drivers/leds/trigger/ledtrig-netdev.c
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+++ b/drivers/leds/trigger/ledtrig-netdev.c
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@@ -20,7 +20,7 @@
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#include <linux/list.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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-#include <linux/spinlock.h>
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+#include <linux/mutex.h>
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#include <linux/timer.h>
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#include "../leds.h"
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@@ -37,7 +37,7 @@
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*/
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struct led_netdev_data {
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- spinlock_t lock;
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+ struct mutex lock;
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struct delayed_work work;
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struct notifier_block notifier;
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@@ -97,9 +97,9 @@ static ssize_t device_name_show(struct d
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struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
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ssize_t len;
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- spin_lock_bh(&trigger_data->lock);
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+ mutex_lock(&trigger_data->lock);
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len = sprintf(buf, "%s\n", trigger_data->device_name);
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- spin_unlock_bh(&trigger_data->lock);
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+ mutex_unlock(&trigger_data->lock);
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return len;
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}
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@@ -115,7 +115,7 @@ static ssize_t device_name_store(struct
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cancel_delayed_work_sync(&trigger_data->work);
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- spin_lock_bh(&trigger_data->lock);
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+ mutex_lock(&trigger_data->lock);
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if (trigger_data->net_dev) {
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dev_put(trigger_data->net_dev);
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@@ -138,7 +138,7 @@ static ssize_t device_name_store(struct
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trigger_data->last_activity = 0;
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set_baseline_state(trigger_data);
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- spin_unlock_bh(&trigger_data->lock);
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+ mutex_unlock(&trigger_data->lock);
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return size;
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}
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@@ -279,7 +279,7 @@ static int netdev_trig_notify(struct not
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cancel_delayed_work_sync(&trigger_data->work);
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- spin_lock_bh(&trigger_data->lock);
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+ mutex_lock(&trigger_data->lock);
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trigger_data->carrier_link_up = false;
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switch (evt) {
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@@ -304,7 +304,7 @@ static int netdev_trig_notify(struct not
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set_baseline_state(trigger_data);
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- spin_unlock_bh(&trigger_data->lock);
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+ mutex_unlock(&trigger_data->lock);
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return NOTIFY_DONE;
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}
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@@ -365,7 +365,7 @@ static int netdev_trig_activate(struct l
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if (!trigger_data)
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return -ENOMEM;
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- spin_lock_init(&trigger_data->lock);
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+ mutex_init(&trigger_data->lock);
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trigger_data->notifier.notifier_call = netdev_trig_notify;
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trigger_data->notifier.priority = 10;
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