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[WATCHDOG] doc: Fix use of WDIOC_SETOPTIONS ioctl.

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In the watchdog-test program and watchdog-api.txt, pass the values to
the WDIOC_SETOPTIONS ioctl as a pointer to an integer containing the
values intead of directly in the third ioctl argument. The actual
watchdog drivers in drivers/watchdog don't read the options directly
from the argument but use get_user and copy_from_user.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
James Hogan 2010-04-05 11:31:29 +01:00 committed by Wim Van Sebroeck
parent cf9cf9aed1
commit dfc333834c
2 changed files with 8 additions and 5 deletions
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8
Documentation/watchdog/src/watchdog-test.c
View File

@ -31,6 +31,8 @@ static void keep_alive(void)
*/
int main(int argc, char *argv[])
{
int flags;
fd = open("/dev/watchdog", O_WRONLY);
if (fd == -1) {
@ -41,12 +43,14 @@ int main(int argc, char *argv[])
if (argc > 1) {
if (!strncasecmp(argv[1], "-d", 2)) {
ioctl(fd, WDIOC_SETOPTIONS, WDIOS_DISABLECARD);
flags = WDIOS_DISABLECARD;
ioctl(fd, WDIOC_SETOPTIONS, &flags);
fprintf(stderr, "Watchdog card disabled.\n");
fflush(stderr);
exit(0);
} else if (!strncasecmp(argv[1], "-e", 2)) {
ioctl(fd, WDIOC_SETOPTIONS, WDIOS_ENABLECARD);
flags = WDIOS_ENABLECARD;
ioctl(fd, WDIOC_SETOPTIONS, &flags);
fprintf(stderr, "Watchdog card enabled.\n");
fflush(stderr);
exit(0);

5
Documentation/watchdog/watchdog-api.txt
View File

@ -222,11 +222,10 @@ returned value is the temperature in degrees fahrenheit.
ioctl(fd, WDIOC_GETTEMP, &temperature);
Finally the SETOPTIONS ioctl can be used to control some aspects of
the cards operation; right now the pcwd driver is the only one
supporting this ioctl.
the cards operation.
int options = 0;
ioctl(fd, WDIOC_SETOPTIONS, options);
ioctl(fd, WDIOC_SETOPTIONS, &options);
The following options are available: