[PATCH] kexec: add further check to crashkernel

[Eric W. Biederman]

DuanZhenzhong <zhenzhong.duan at oracle.com> writes:

> From: Zhenzhong Duan <zhenzhong.duan at oracle.com>
>
> When add crashkernel=2M-256M, kernel don't give any warning.
> This is misleading sometimes.

That seems reasonable.

Andrew do you want to carry this one.  I don't have a good tree to stash
this in.

Acked-by: "Eric W. Biederman" <ebiederm at xmission.com>

> Signed-off-by: Zhenzhong Duan <zhenzhong.duan at oracle.com>
> ---
> kernel/kexec.c |    4 ++++
> 1 files changed, 4 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/kexec.c b/kernel/kexec.c
> index 7b08867..0a6d147 100644
> --- a/kernel/kexec.c
> +++ b/kernel/kexec.c
> @@ -1359,6 +1359,10 @@ static int __init parse_crashkernel_simple(char 		*cmdline,
>
> 	if (*cur == '@')
> 		*crash_base = memparse(cur+1, &cur);
> +	else if (*cur != ' ' && *cur != '\0') {
> +		pr_warning("crashkernel: unrecognized char\n");
> +		return -EINVAL;
> +	}
>
> 	return 0;
> }
> -- 1.7.3