From: Dan Carpenter Date: Fri, 11 Aug 2017 20:05:41 +0000 (+0300) Subject: powerpc/perf: Fix double unlock in imc_common_cpuhp_mem_free() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b3376dcc6c62452fe24e76d8fc35bb13eb7ee178;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git powerpc/perf: Fix double unlock in imc_common_cpuhp_mem_free() This function is not called with the nest_init_lock held, and it also unlocks the nest_init_lock immediately below, so it's fairly clear that this is a typo and should be locking the lock. Fixes: 885dcd709ba9 ("powerpc/perf: Add nest IMC PMU support") Signed-off-by: Dan Carpenter Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c index 46cd912af060..52017f6eafd9 100644 --- a/arch/powerpc/perf/imc-pmu.c +++ b/arch/powerpc/perf/imc-pmu.c @@ -1124,7 +1124,7 @@ static void cleanup_all_thread_imc_memory(void) static void imc_common_cpuhp_mem_free(struct imc_pmu *pmu_ptr) { if (pmu_ptr->domain == IMC_DOMAIN_NEST) { - mutex_unlock(&nest_init_lock); + mutex_lock(&nest_init_lock); if (nest_pmus == 1) { cpuhp_remove_state(CPUHP_AP_PERF_POWERPC_NEST_IMC_ONLINE); kfree(nest_imc_refc);