From c005828744f584bfcd2cf3ed64dfef15a5078960 Mon Sep 17 00:00:00 2001 From: Daniel Scally Date: Fri, 8 Oct 2021 23:46:08 +0100 Subject: [PATCH] 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: 7540599a5ef1 ("platform/x86: intel_skl_int3472: Provide skl_int3472_unregister_clock()") Signed-off-by: Daniel Scally Link: https://lore.kernel.org/r/20211008224608.415949-1-djrscally@gmail.com Signed-off-by: Hans de Goede --- drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c b/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c index 9fe0a25..e59d79c 100644 --- a/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c +++ b/drivers/platform/x86/intel/int3472/intel_skl_int3472_discrete.c @@ -401,7 +401,7 @@ int skl_int3472_discrete_remove(struct platform_device *pdev) gpiod_remove_lookup_table(&int3472->gpios); - if (int3472->clock.ena_gpio) + if (int3472->clock.cl) skl_int3472_unregister_clock(int3472); gpiod_put(int3472->clock.ena_gpio); -- 2.7.4