[PATCH] arm64/sme: Fix the ffr variable assignment

[Mark Brown]

On Wed, Jun 01, 2022 at 06:13:46PM +0100, Catalin Marinas wrote:
> This variable is a bool and expected to be set to true if the FFR
> state needs saving/restoring, false otherwise. In __efi_fpsimd_end()
> this variable should be restored to the value of efi_sm_state but this
> is a per-CPU variable, not to be read directly. Make ffr false if
> !__this_cpu_read(efi_sm_state), leave it true otherwise.

> -				if (__this_cpu_read(efi_sm_state)) {
> +				if (__this_cpu_read(efi_sm_state))
>  					sysreg_clear_set_s(SYS_SVCR,
>  							   0,
>  							   SVCR_SM_MASK);
> -					if (!system_supports_fa64())
> -						ffr = efi_sm_state;
> -				}
> +				else
> +					ffr = false;

In the case where we support FA64 we need to load FFR so this
needs to be conditional on system_supports_fa64() in the case
where efi_sm_state is true.
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