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| author |   Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2020-09-22 13:32:54 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2020-10-08 21:17:16 +1100 |
| commit | a2d0230b91f7e23ceb5d8fb6a9799f30517ec33a (patch) | |
| tree | 3041b487ed4d18b2916e48eb2cd8143d6844756e /drivers/cpufreq/powernv-cpufreq.c | |
| parent | powerpc/time: Make get_tb() common to PPC32 and PPC64 (diff) | |
| download | linux-dev-a2d0230b91f7e23ceb5d8fb6a9799f30517ec33a.tar.xz linux-dev-a2d0230b91f7e23ceb5d8fb6a9799f30517ec33a.zip | |
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.c | 9 |
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; |