diff options
| author |   Tony Lindgren <tony@atomide.com> | 2017-10-16 14:07:14 -0700 |
|---|---|---|
| committer |   Eduardo Valentin <edubezval@gmail.com> | 2017-10-31 19:32:14 -0700 |
| commit | ba817a8cfc2e128b59af7fe8b6af72ed38763b87 (patch) | |
| tree | 89e989d5250cfb7760cff71a00ffe0b68bb5d925 /drivers/thermal | |
| parent | thermal: rcar_gen3_thermal: fix initialization sequence for H3 ES2.0 (diff) | |
| download | linux-dev-ba817a8cfc2e128b59af7fe8b6af72ed38763b87.tar.xz linux-dev-ba817a8cfc2e128b59af7fe8b6af72ed38763b87.zip | |
thermal: ti-soc-thermal: Fix ti_thermal_unregister_cpu_cooling NULL pointer on unload
While debugging some PM issues and trying to remove all the loaded modules, I ran
across the following when unloading ti-soc-thermal:
Unable to handle kernel NULL pointer dereference at virtual address 000000b4
...
[<c08db340>] (kobject_put) from [<bf28954c>] (ti_thermal_unregister_cpu_cooling+0x20/0x28 [ti_soc_thermal])
[<bf28954c>] (ti_thermal_unregister_cpu_cooling [ti_soc_thermal]) from [<bf287c88>] (ti_bandgap_remove+0x3c/0x104 [ti_soc_thermal])
[<bf287c88>] (ti_bandgap_remove [ti_soc_thermal]) from [<c0610d48>] (platform_drv_remove+0x24/0x3c)
[<c0610d48>] (platform_drv_remove) from [<c060f114>] (device_release_driver_internal+0x160/0x208)
[<c060f114>] (device_release_driver_internal) from [<c060f200>] (driver_detach+0x38/0x6c)
[<c060f200>] (driver_detach) from [<c060e2d4>] (bus_remove_driver+0x4c/0xa0)
[<c060e2d4>] (bus_remove_driver) from [<c01f2370>] (SyS_delete_module+0x168/0x238)
[<c01f2370>] (SyS_delete_module) from [<c0108240>] (ret_fast_syscall+0x0/0x28)
Cc: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c index c211a8e4a210..b4f981daeaf2 100644 --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c @@ -278,7 +278,8 @@ int ti_thermal_unregister_cpu_cooling(struct ti_bandgap *bgp, int id) if (data) { cpufreq_cooling_unregister(data->cool_dev); - cpufreq_cpu_put(data->policy); + if (data->policy) + cpufreq_cpu_put(data->policy); } return 0; |