Revision c46fe4aa8271e97b520dc72018688e083460127c authored by Linus Torvalds on 12 June 2021, 19:27:05 UTC, committed by Linus Torvalds on 12 June 2021, 19:27:05 UTC
Pull serial driver fix from Greg KH: "A single 8250_exar serial driver fix for a reported problem with a change that happened in 5.13-rc1. It has been in linux-next with no reported problems" * tag 'tty-5.13-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: serial: 8250_exar: Avoid NULL pointer dereference at ->exit()
leds-cobalt-raq.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* LEDs driver for the Cobalt Raq series.
*
* Copyright (C) 2007 Yoichi Yuasa <yuasa@linux-mips.org>
*/
#include <linux/init.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/export.h>
#define LED_WEB 0x04
#define LED_POWER_OFF 0x08
static void __iomem *led_port;
static u8 led_value;
static DEFINE_SPINLOCK(led_value_lock);
static void raq_web_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
unsigned long flags;
spin_lock_irqsave(&led_value_lock, flags);
if (brightness)
led_value |= LED_WEB;
else
led_value &= ~LED_WEB;
writeb(led_value, led_port);
spin_unlock_irqrestore(&led_value_lock, flags);
}
static struct led_classdev raq_web_led = {
.name = "raq::web",
.brightness_set = raq_web_led_set,
};
static void raq_power_off_led_set(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
unsigned long flags;
spin_lock_irqsave(&led_value_lock, flags);
if (brightness)
led_value |= LED_POWER_OFF;
else
led_value &= ~LED_POWER_OFF;
writeb(led_value, led_port);
spin_unlock_irqrestore(&led_value_lock, flags);
}
static struct led_classdev raq_power_off_led = {
.name = "raq::power-off",
.brightness_set = raq_power_off_led_set,
.default_trigger = "power-off",
};
static int cobalt_raq_led_probe(struct platform_device *pdev)
{
struct resource *res;
int retval;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EBUSY;
led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
if (!led_port)
return -ENOMEM;
retval = led_classdev_register(&pdev->dev, &raq_power_off_led);
if (retval)
goto err_null;
retval = led_classdev_register(&pdev->dev, &raq_web_led);
if (retval)
goto err_unregister;
return 0;
err_unregister:
led_classdev_unregister(&raq_power_off_led);
err_null:
led_port = NULL;
return retval;
}
static struct platform_driver cobalt_raq_led_driver = {
.probe = cobalt_raq_led_probe,
.driver = {
.name = "cobalt-raq-leds",
},
};
builtin_platform_driver(cobalt_raq_led_driver);
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