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@xxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxx>
---
Untested. It would be great if someone at HP (or anyone with the
hardware, I guess) could test and review this patch. Thanks.
Changes since v1:
* Drop useless "ret = 0" statements as suggested by Guenter.
drivers/watchdog/hpwdt.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
--- linux-4.1-rc8.orig/drivers/watchdog/hpwdt.c 2015-06-20 12:56:17.933391230 +0200
+++ linux-4.1-rc8/drivers/watchdog/hpwdt.c 2015-06-21 08:31:21.671106961 +0200
@@ -588,7 +588,7 @@ static long hpwdt_ioctl(struct file *fil
{
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 *fil
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)
--
Jean Delvare
SUSE L3 Support
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