[PATCH] arm64: smccc: Save lr before calling __arm_smccc_sve_check()

[Mark Brown]

On Tue, Jul 20, 2021 at 06:31:05PM +0200, Jean-Philippe Brucker wrote:
> Commit cfa7ff959a78 ("arm64: smccc: Support SMCCC v1.3 SVE register
> saving hint") added a call to __arm_smccc_sve_check() which clobbers the
> lr (register x30), causing __arm_smccc_hvc() to return to itself and
> crash. Save lr on the stack before calling __arm_smccc_sve_check(), and
> adjust the offsets used to access stack parameters.

Acked-by: Mark Brown <broonie at kernel.org>
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