On Fri, Jun 22, 2012 at 11:54:02AM +0200, Juergen Beisert wrote:
> This patch adds a simple wd command which can setup, trigger and stop a
> watchdog
> on the platform.
>
> +static int do_wd(int argc, char *argv[])
> +{
> + int rc;
> +
> + if (argc > 1) {
> + if (isdigit(*argv[1])) {
> + timeout = simple_strtoul(argv[1], NULL, 0);
> + } else {
> + printf("numerical parameter expected\n");
> + return 1;
> + }
> + }
> +
> + rc = watchdog_set_timeout(timeout);
> + if (rc == -EINVAL) {
Why do you check for -EINVAL only? This way all other errors will be
silently ignored.
> + if (timeout == 0)
> + printf("Watchdog cannot be disabled\n");
> + else
> + printf("Timeout value out of range\n");
> + return rc;
Do not return negative error codes here. The shell will interpret
negative numbers as 'exit'. You have to return 1 for failure.
> + }
> + return 0;
> +}
> +
> +
> +#ifndef INCLUDE_WATCHDOG_H
> +# define INCLUDE_WATCHDOG_H
> +
> +extern int watchdog_set_timeout(unsigned);
extern is not needed here.
Sascha
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