On 06/21/2016 04:00 PM, Timur Tabi wrote:
Some drivers have the WDIOF_MAGICCLOSE set, which means that applications
need to write 'V' to the watchdog device before closing, otherwise the
driver won't stop the watchdog timer.
Signed-off-by: Timur Tabi <timur@xxxxxxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
Documentation/watchdog/src/watchdog-test.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/watchdog/src/watchdog-test.c b/Documentation/watchdog/src/watchdog-test.c
index b3cc7aa..c691539 100644
--- a/Documentation/watchdog/src/watchdog-test.c
+++ b/Documentation/watchdog/src/watchdog-test.c
@@ -13,6 +13,7 @@
#include <linux/watchdog.h>
int fd;
+const char v = 'V';
/*
* This function simply sends an IOCTL to the driver, which in turn ticks
@@ -34,6 +35,7 @@ static void keep_alive(void)
static void term(int sig)
{
+ write(fd, &v, 1);
close(fd);
printf("\nStopping watchdog ticks...\n");
exit(0);
@@ -89,6 +91,7 @@ int main(int argc, char *argv[])
sleep(ping_rate);
}
end:
+ write(fd, &v, 1);
close(fd);
return 0;
}
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