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Fix problem with hotplug state machine in coretemp driver 

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Merge tag 'hwmon-for-linus-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon fix from Guenter Roeck:
 "Fix problem with hotplug state machine in coretemp driver"

* tag 'hwmon-for-linus-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
  hwmon: (coretemp) Handle frozen hotplug state correctly
hifive-unleashed-5.1
Linus Torvalds 2017-05-18 09:38:09 -07:00
parent dac94e2911 90b4f30b6d
commit af5d28565f
1 changed files with 14 additions and 0 deletions
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14
drivers/hwmon/coretemp.c
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@ -604,6 +604,13 @@ static int coretemp_cpu_online(unsigned int cpu)
struct cpuinfo_x86 *c = &cpu_data(cpu);
struct platform_data *pdata;
/*
* Don't execute this on resume as the offline callback did
* not get executed on suspend.
*/
if (cpuhp_tasks_frozen)
return 0;
/*
* CPUID.06H.EAX[0] indicates whether the CPU has thermal
* sensors. We check this bit only, all the early CPUs
@ -654,6 +661,13 @@ static int coretemp_cpu_offline(unsigned int cpu)
struct temp_data *tdata;
int indx, target;
/*
* Don't execute this on suspend as the device remove locks
* up the machine.
*/
if (cpuhp_tasks_frozen)
return 0;
/* If the physical CPU device does not exist, just return */
if (!pdev)
return 0;