From: Jean Delvare <jdelvare@suse.de>
Date: Sun, 21 Jun 2015 07:32:33 +0000 (+0200)
Subject: watchdog: hpwdt: Add support for WDIOC_SETOPTIONS
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=46c80b20d07e9309677d81e1226dc30a055b63b7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

watchdog: hpwdt: Add support for WDIOC_SETOPTIONS

WDIOC_SETOPTIONS makes it possible to disable and re-enable the
watchdog timer while the hpwdt driver is loaded.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
---

diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index ada3e44f9932..286369d4f0f5 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -588,7 +588,7 @@ static long hpwdt_ioctl(struct file *file, unsigned int cmd,
 {
 	void __user *argp = (void __user *)arg;
 	int __user *p = argp;
-	int new_margin;
+	int new_margin, options;
 	int ret = -ENOTTY;
 
 	switch (cmd) {
@@ -608,6 +608,20 @@ static long hpwdt_ioctl(struct file *file, unsigned int cmd,
 		ret = 0;
 		break;
 
+	case WDIOC_SETOPTIONS:
+		ret = get_user(options, p);
+		if (ret)
+			break;
+
+		if (options & WDIOS_DISABLECARD)
+			hpwdt_stop();
+
+		if (options & WDIOS_ENABLECARD) {
+			hpwdt_start();
+			hpwdt_ping();
+		}
+		break;
+
 	case WDIOC_SETTIMEOUT:
 		ret = get_user(new_margin, p);
 		if (ret)