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selftests: watchdog: Fix ioctl SET* error paths to take oneshot exit path 

When ioctls for WDIOC_SETOPTIONS (WDIOS_DISABLECARD or WDIOS_ENABLECARD),
WDIOC_SETTIMEOUT, and WDIOC_SETPRETIMEOUT fail, the error path continues
to handler watchdog timer until user terminates it. When ioctl returns
error, it might not be safe to let the watchdog tick. The error could be
due an unsupported ioctl command or some other error.

Fix it to handle error paths as oneshot to stop the watchdog ticks and
exit right away.

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
This commit is contained in:
Shuah Khan (Samsung OSG) 2018-09-26 16:37:43 -06:00
parent 7514c39cf1
commit d89d08ffd2
1 changed files with 12 additions and 4 deletions
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16
tools/testing/selftests/watchdog/watchdog-test.c
View File

@ -123,16 +123,20 @@ int main(int argc, char *argv[])
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
if (!ret)
printf("Watchdog card disabled.\n");
else
else {
printf("WDIOS_DISABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
}
break;
case 'e':
flags = WDIOS_ENABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
if (!ret)
printf("Watchdog card enabled.\n");
else
else {
printf("WDIOS_ENABLECARD error '%s'\n", strerror(errno));
oneshot = 1;
}
break;
case 'p':
ping_rate = strtoul(optarg, NULL, 0);
@ -145,8 +149,10 @@ int main(int argc, char *argv[])
ret = ioctl(fd, WDIOC_SETTIMEOUT, &flags);
if (!ret)
printf("Watchdog timeout set to %u seconds.\n", flags);
else
else {
printf("WDIOC_SETTIMEOUT error '%s'\n", strerror(errno));
oneshot = 1;
}
break;
case 'T':
oneshot = 1;
@ -161,8 +167,10 @@ int main(int argc, char *argv[])
ret = ioctl(fd, WDIOC_SETPRETIMEOUT, &flags);
if (!ret)
printf("Watchdog pretimeout set to %u seconds.\n", flags);
else
else {
printf("WDIOC_SETPRETIMEOUT error '%s'\n", strerror(errno));
oneshot = 1;
}
break;
case 'N':
oneshot = 1;