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watchdog: hpwdt: Add support for WDIOC_SETOPTIONS

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

Signed-off-by: Jean Delvare <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
This commit is contained in:
Jean Delvare authored and Wim Van Sebroeck committed 2015-06-22 15:54:36 +02:00
1 parent a47911e99f
commit 46c80b20d0
1 file changed
+15 -1
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drivers/watchdog/hpwdt.c
+15 -1
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@@ -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)