On Tue, Mar 20, 2018 at 07:29:51PM +1100, NeilBrown wrote:
>
> ralink_halt() does nothing that machine_halt()
> doesn't already do, so it adds no value.
>
> It actually causes incorrect behaviour due to the
> "unreachable()" at the end. This tell the compiler that the
> end of the function will never be reached, which isn't true.
> The compiler responds by not adding a 'return' instruction,
> so control simply moves on to whatever bytes come afterwards
> in memory. In my tested, that was the ralink_restart()
> function. This means that an attempt to 'halt' the machine
> would actually cause a reboot.
>
> So remove ralink_halt() so that a 'halt' really does halt.
>
> Signed-off-by: NeilBrown <neil@xxxxxxxxxx>
Thanks, I've cosmetically tweaked the commit message (mainly reflow to
72 characters) and added:
Fixes: c06e836ada59 ("MIPS: ralink: adds reset code")
Cc: <stable@xxxxxxxxxxxxxxx> # 3.9+
and applied for 4.16.
BTW, I'm intrigued to know if there's a particular reason you don't
author / sign-off as "Neil Brown"? Its supposed to be real names, though
"NeilBrown" is hardly difficult to figure out so I don't actually
object.
Cheers
James
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