Re: [PATCH] watchdog: imx2_wdt: Fix ioctl() results

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On 06/05/2015 05:41 AM, Markus Rinne wrote:
WDIOC_SETTIMEOUT and WDIOC_GETTIMEOUT returned the initial timeout and
not the one that was last set.  Fix this by updating struct
watchdog_device member 'timeout'.  This is how it's supposed to be done
according to Documentation/watchdog/watchdog-kernel-api.txt.

This is the test case I used:

#include <fcntl.h>
#include <linux/watchdog.h>
#include <sys/stat.h>
#include <sys/types.h>

#include <assert.h>
#include <stdlib.h>

static const int TIMEOUT = 127;

int main(void)
{
	int fd = open("/dev/watchdog", O_WRONLY);
	if (fd == -1)
		return EXIT_FAILURE;

	int timeout = TIMEOUT;
	ioctl(fd, WDIOC_SETTIMEOUT, &timeout);
	assert(timeout == TIMEOUT);

	close(fd);

	return EXIT_SUCCESS;
}

Signed-off-by: Markus Rinne <markus.rinne@xxxxxxxxx>
---

Good catch.

Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>

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