[PATCH] x86/CPU: Fix warm boot hang regression on AMD SC1100 SoC systems

[Ingo Molnar]

* Russell Senior <russell@xxxxxxxxxxxxxxxxx> wrote:

> More poking/prodding and coaching from Jonas Gorski (cc'd), it looks
> like this test patch fixes the problem on my board: Tested against
> v6.6.67 and v4.14.113:
> 
> --- a/arch/x86/kernel/cpu/cyrix.c
> +++ b/arch/x86/kernel/cpu/cyrix.c
> @@ -153,8 +153,8 @@ static void geode_configure(void)
>         u8 ccr3;
>         local_irq_save(flags);
> 
> -       /* Suspend on halt power saving and enable #SUSP pin */
> -       setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x88);
> +       /* Suspend on halt power saving */
> +       setCx86(CX86_CCR2, getCx86(CX86_CCR2) | 0x08);
> 
>         ccr3 = getCx86(CX86_CCR3);
>         setCx86(CX86_CCR3, (ccr3 & 0x0f) | 0x10);       /* enable MAPEN */

That's really useful - thank you!

I've constructed a fix patch from your mails, attached below. I added 
your Signed-off-by to the fix, let me know if that's OK with you.

I have applied your fix to the x86 tree, if everything goes fine it 
ought to go upstream during the next merge window in ~4 weeks, with 
v6.15.

Thanks,

	Ingo

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