iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/drivers/cpufreq
History
Geert Uytterhoeven 09712f557b cpufreq: Avoid crash in resume on SMP without OPP 
When resuming from s2ram on an SMP system without cpufreq operating
points (e.g. there's no "operating-points" property for the CPU node in
DT, or the platform doesn't use DT yet), the kernel crashes when
bringing CPU 1 online:

    Enabling non-boot CPUs ...
    CPU1: Booted secondary processor
    Unable to handle kernel NULL pointer dereference at virtual address 0000003c
    pgd = ee5e6b00
    [0000003c] *pgd=6e579003, *pmd=6e588003, *pte=00000000
    Internal error: Oops: a07 [#1] SMP ARM
    Modules linked in:
    CPU: 0 PID: 1246 Comm: s2ram Tainted: G        W      3.18.0-rc3-koelsch-01614-g0377af242bb175c8-dirty #589
    task: eeec5240 ti: ee704000 task.ti: ee704000
    PC is at __cpufreq_add_dev.isra.24+0x24c/0x77c
    LR is at __cpufreq_add_dev.isra.24+0x244/0x77c
    pc : [<c0298efc>]    lr : [<c0298ef4>]    psr: 60000153
    sp : ee705d48  ip : ee705d48  fp : ee705d84
    r10: c04e0450  r9 : 00000000  r8 : 00000001
    r7 : c05426a8  r6 : 00000001  r5 : 00000001  r4 : 00000000
    r3 : 00000000  r2 : 00000000  r1 : 20000153  r0 : c0542734

Verify that policy is not NULL before dereferencing it to fix this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Fixes: 8414809c6a1e (cpufreq: Preserve policy structure across suspend/resume)
Cc: 3.12+ <stable@vger.kernel.org> # 3.12+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-11-08 02:10:04 +01:00
..
acpi-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
amd_freq_sensitivity.c
cpufreq: AMD "frequency sensitivity feedback" powersave bias for ondemand governor
2013-04-10 13:19:26 +02:00
arm_big_little_dt.c
cpufreq: arm_big_little: fix module license spec
2014-08-09 02:43:33 +02:00
arm_big_little.c
cpufreq: arm_big_little: fix module license spec
2014-08-09 02:43:33 +02:00
arm_big_little.h
cpufreq: arm_big_little: add in-kernel switching (IKS) support
2013-10-31 00:10:53 +01:00
at32ap-cpufreq.c
cpufreq: at32ap: don't declare local variable as static
2014-04-07 14:31:33 +02:00
blackfin-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
cpufreq_conservative.c
cpufreq: conservative: set requested_freq to policy max when it is over policy max
2013-11-12 23:18:20 +01:00
cpufreq_governor.c
cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info'
2014-06-09 12:58:21 +02:00
cpufreq_governor.h
cpufreq: governor: remove copy_prev_load from 'struct cpu_dbs_common_info'
2014-06-09 12:58:21 +02:00
cpufreq_ondemand.c
cpufreq: ondemand: Eliminate the deadband effect
2014-07-21 13:43:19 +02:00
cpufreq_opp.c
cpufreq / OPP: Fix the order of arguments for kcalloc()
2014-09-08 00:02:58 +02:00
cpufreq_performance.c
cpufreq: Clean up header files included in the core
2013-08-07 23:34:09 +02:00
cpufreq_powersave.c
cpufreq: Clean up header files included in the core
2013-08-07 23:34:09 +02:00
cpufreq_stats.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
cpufreq_userspace.c
cpufreq / governor: Remove fossil comment
2013-10-17 23:00:20 +02:00
cpufreq-dt.c
cpufreq: cpufreq-dt: Fix arguments in clock failure error message
2014-11-05 20:51:21 +01:00
cpufreq-nforce2.c
cpufreq: nforce2: remove DEFINE_PCI_DEVICE_TABLE macro
2014-05-17 01:16:15 +02:00
cpufreq.c
cpufreq: Avoid crash in resume on SMP without OPP
2014-11-08 02:10:04 +01:00
cris-artpec3-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
cris-etraxfs-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
davinci-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
dbx500-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
e_powersaver.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
elanfreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
exynos4x12-cpufreq.c
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
exynos4210-cpufreq.c
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
exynos5250-cpufreq.c
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
exynos5440-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
exynos-cpufreq.c
ACPI and power management updates for 3.16-rc1
2014-06-04 08:57:16 -07:00
exynos-cpufreq.h
ACPI and power management updates for 3.16-rc1
2014-06-04 08:57:16 -07:00
freq_table.c
cpufreq: Introduce new relation for freq selection
2014-07-21 13:43:19 +02:00
gx-suspmod.c
cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}
2014-03-26 16:41:41 +01:00
highbank-cpufreq.c
Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration
2014-10-21 11:21:19 -07:00
ia64-acpi-cpufreq.c
cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
2014-04-07 14:43:49 +02:00
imx6q-cpufreq.c
cpufreq: imx6: remove pu regulator dependency for SOCs with no PU regulator
2014-07-21 13:43:19 +02:00
integrator-cpufreq.c
cpufreq: integrator: fix integrator_cpufreq_remove return type
2014-09-29 15:36:03 +02:00
intel_pstate.c
intel_pstate: Correct BYT VID values.
2014-10-23 23:00:00 +02:00
Kconfig
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
Kconfig.arm
ACPI and power management updates for 3.18-rc1
2014-10-09 16:07:43 -04:00
Kconfig.powerpc
cpufreq: powernv: cpufreq driver for powernv platform
2014-04-07 14:35:27 +02:00
Kconfig.x86
cpufreq: Kconfig: Fix spelling errors
2014-05-01 01:18:19 +02:00
kirkwood-cpufreq.c
cpufreq: kirkwood: use the powersave multiplexer
2014-09-02 15:02:54 -07:00
longhaul.c
Merge branch 'cpufreq-macros' into pm-cpufreq
2014-05-01 00:50:47 +02:00
longhaul.h
cpufreq: delete __cpuinit usage from all cpufreq files
2013-07-14 19:36:57 -04:00
longrun.c
cpufreq: add new routine cpufreq_verify_within_cpu_limits()
2013-10-16 00:50:23 +02:00
loongson2_cpufreq.c
MIPS: Loongson: Modify ChipConfig register definition
2014-07-30 21:46:00 +02:00
Makefile
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
maple-cpufreq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
omap-cpufreq.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
p4-clockmod.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
pasemi-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
pcc-cpufreq.c
cpufreq: pcc-cpufreq: Fix wait_event() under spinlock
2014-09-29 15:35:50 +02:00
pmac32-cpufreq.c
powerpc: Remove powerpc specific cmd_line
2014-10-02 17:33:55 +10:00
pmac64-cpufreq.c
of: Migrate of_find_node_by_name() users to for_each_node_by_name()
2014-06-26 17:12:24 +01:00
powernow-k6.c
powernow-k6: support 350MHz CPU
2014-07-21 13:43:19 +02:00
powernow-k7.c
cpufreq: powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
2014-04-29 01:22:54 +02:00
powernow-k7.h
[CPUFREQ] Move x86 drivers to drivers/cpufreq/
2011-05-19 18:51:07 -04:00
powernow-k8.c
cpufreq: powernow-k8: Suppress checkpatch warnings
2014-05-17 01:27:01 +02:00
powernow-k8.h
cpufreq: powernow-k8: Suppress checkpatch warnings
2014-05-17 01:27:01 +02:00
powernv-cpufreq.c
cpufreq: powernv: Set the cpus to nominal frequency during reboot/kexec
2014-09-29 15:53:04 +02:00
ppc_cbe_cpufreq_pervasive.c
cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq
2013-04-10 13:19:26 +02:00
ppc_cbe_cpufreq_pmi.c
cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq
2013-04-10 13:19:26 +02:00
ppc_cbe_cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
ppc_cbe_cpufreq.h
cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq
2013-04-10 13:19:26 +02:00
ppc-corenet-cpufreq.c
cpufreq: ppc-corenet: remove duplicate update of cpu_data
2014-09-30 21:09:40 +02:00
pxa2xx-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
pxa3xx-cpufreq.c
cpufreq: Remove cpufreq_generic_exit()
2014-03-12 01:06:00 +01:00
s3c24xx-cpufreq-debugfs.c
cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq
2013-05-20 23:04:28 +09:00
s3c24xx-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s3c64xx-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
s3c2410-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s3c2412-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s3c2416-cpufreq.c
cpufreq: Use cpufreq_for_each_* macros for frequency table iteration
2014-04-30 00:06:21 +02:00
s3c2440-cpufreq.c
cpufreq: s3c24xx: Remove some dead code
2014-07-19 04:24:59 +09:00
s5pv210-cpufreq.c
cpufreq: cpu0: rename driver and internals to 'cpufreq_dt'
2014-10-03 15:37:54 +02:00
sa1100-cpufreq.c
cpufreq: Mark ARM drivers with CPUFREQ_NEED_INITIAL_FREQ_CHECK flag
2014-01-06 14:17:25 +01:00
sa1110-cpufreq.c
cpufreq: sa1110: set memory type for h3600
2014-07-16 14:30:17 +02:00
sc520_freq.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
sh-cpufreq.c
cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end}
2014-03-26 16:41:41 +01:00
sparc-us2e-cpufreq.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
sparc-us3-cpufreq.c
cpufreq: add 'freq_table' in struct cpufreq_policy
2014-03-12 01:06:00 +01:00
spear-cpufreq.c
cpufreq: use kzalloc() to allocate memory for cpufreq_frequency_table
2014-04-07 14:43:49 +02:00
speedstep-centrino.c
cpufreq: Make linux-pm@vger.kernel.org official mailing list
2014-05-01 01:15:32 +02:00
speedstep-ich.c
cpufreq: create another field .flags in cpufreq_frequency_table
2014-04-07 14:43:50 +02:00
speedstep-lib.c
cpufreq: Add support for x86 cpuinfo auto loading v4
2012-01-26 16:49:06 -08:00
speedstep-lib.h
[CPUFREQ] Move x86 drivers to drivers/cpufreq/
2011-05-19 18:51:07 -04:00
speedstep-smi.c
cpufreq: speedstep-smi: fix decimal printf specifiers
2014-08-07 21:21:52 +02:00
tegra-cpufreq.c
cpufreq: tegra: update comment for clarity
2014-06-10 22:50:50 +02:00
unicore2-cpufreq.c
cpufreq: unicore32: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO
2014-04-21 23:42:27 +02:00
vexpress-spc-cpufreq.c
cpufreq: arm_big_little: add vexpress SPC interface driver
2013-10-30 00:48:26 +01:00