On Mon, Feb 19, 2018 at 09:18:37AM +0100, Mylène Josserand wrote:
> On sun8i-a63t, hotplug CPU for CPU0 is currently not working.
> Remove the possibility to disable CPU0 only for sun8i-a83t.
>
> Signed-off-by: Mylène Josserand <mylene.josser...@bootlin.com>
> ---
> arch/arm/mach-sunxi/mc_smp.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-sunxi/mc_smp.c b/arch/arm/mach-sunxi/mc_smp.c
> index fec592bf68b4..69d5ae5b3d72 100644
> --- a/arch/arm/mach-sunxi/mc_smp.c
> +++ b/arch/arm/mach-sunxi/mc_smp.c
> @@ -661,8 +661,12 @@ static int sunxi_mc_smp_cpu_kill(unsigned int l_cpu)
> return !ret;
> }
>
> -static bool sunxi_mc_smp_cpu_can_disable(unsigned int __unused)
> +static bool sunxi_mc_smp_cpu_can_disable(unsigned int cpu)
> {
> + /* CPU0 hotplug handled only for sun9i */
> + if (of_machine_is_compatible("allwinner,sun8i-a83t"))
> + if (cpu == 0)
> + return false;This also means that you have a window in your patch sequence where you can disable the CPU0 on the A83t. This patch should be earlier. Maxime -- Maxime Ripard, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering http://bootlin.com
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