From: Will Deacon will@kernel.org
[ Upstream commit 891deb87585017d526b67b59c15d38755b900fea ]
cpu_psci_cpu_die() is called in the context of the dying CPU, which will no longer be online or tracked by RCU. It is therefore not generally safe to call printk() if the PSCI "cpu off" request fails, so remove the pr_crit() invocation.
Cc: Qian Cai cai@redhat.com Cc: "Paul E. McKenney" paulmck@kernel.org Cc: Catalin Marinas catalin.marinas@arm.com Link: https://lore.kernel.org/r/20201106103602.9849-2-will@kernel.org Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/kernel/psci.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c index 43ae4e0c968f6..62d2bda7adb80 100644 --- a/arch/arm64/kernel/psci.c +++ b/arch/arm64/kernel/psci.c @@ -66,7 +66,6 @@ static int cpu_psci_cpu_disable(unsigned int cpu)
static void cpu_psci_cpu_die(unsigned int cpu) { - int ret; /* * There are no known implementations of PSCI actually using the * power state field, pass a sensible default for now. @@ -74,9 +73,7 @@ static void cpu_psci_cpu_die(unsigned int cpu) u32 state = PSCI_POWER_STATE_TYPE_POWER_DOWN << PSCI_0_2_POWER_STATE_TYPE_SHIFT;
- ret = psci_ops.cpu_off(state); - - pr_crit("unable to power off CPU%u (%d)\n", cpu, ret); + psci_ops.cpu_off(state); }
static int cpu_psci_cpu_kill(unsigned int cpu)