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authorSrikar Dronamraju <srikar@linux.vnet.ibm.com>2020-09-22 13:32:54 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2020-10-08 21:17:16 +1100
commita2d0230b91f7e23ceb5d8fb6a9799f30517ec33a (patch)
tree3041b487ed4d18b2916e48eb2cd8143d6844756e /drivers/cpufreq/powernv-cpufreq.c
parent9686e431c683ee7b8aca0f3985c244aee3d9f30d (diff)
downloadlinux-a2d0230b91f7e23ceb5d8fb6a9799f30517ec33a.tar.bz2
cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier
The patch avoids allocating cpufreq_policy on stack hence fixing frame size overflow in 'powernv_cpufreq_reboot_notifier': drivers/cpufreq/powernv-cpufreq.c: In function powernv_cpufreq_reboot_notifier: drivers/cpufreq/powernv-cpufreq.c:906:1: error: the frame size of 2064 bytes is larger than 2048 bytes Fixes: cf30af76 ("cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec") Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Reviewed-by: Daniel Axtens <dja@axtens.net> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200922080254.41497-1-srikar@linux.vnet.ibm.com
Diffstat (limited to 'drivers/cpufreq/powernv-cpufreq.c')
-rw-r--r--drivers/cpufreq/powernv-cpufreq.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
index a9af15e994cc..e439b43c19eb 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -885,12 +885,15 @@ static int powernv_cpufreq_reboot_notifier(struct notifier_block *nb,
unsigned long action, void *unused)
{
int cpu;
- struct cpufreq_policy cpu_policy;
+ struct cpufreq_policy *cpu_policy;
rebooting = true;
for_each_online_cpu(cpu) {
- cpufreq_get_policy(&cpu_policy, cpu);
- powernv_cpufreq_target_index(&cpu_policy, get_nominal_index());
+ cpu_policy = cpufreq_cpu_get(cpu);
+ if (!cpu_policy)
+ continue;
+ powernv_cpufreq_target_index(cpu_policy, get_nominal_index());
+ cpufreq_cpu_put(cpu_policy);
}
return NOTIFY_DONE;