platform/x86: intel_skl_int3472: Correct null check
The int3472-discrete driver can enter an error path after initialising int3472->clock.ena_gpio, but before it has registered the clock. This will cause a NULL pointer dereference, because clkdev_drop() is not null aware. Instead of guarding the call to skl_int3472_unregister_clock() by checking for .ena_gpio, check specifically for the presence of the clk_lookup, which will guarantee clkdev_create() has already been called. Bug: https://bugzilla.kernel.org/show_bug.cgi?id=214453 Fixes: 7540599a ("platform/x86: intel_skl_int3472: Provide skl_int3472_unregister_clock()") Signed-off-by: Daniel Scally <djrscally@gmail.com> Link: https://lore.kernel.org/r/20211008224608.415949-1-djrscally@gmail.comSigned-off-by: Hans de Goede <hdegoede@redhat.com>
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