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Power management fix for 7.1-rc6

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Fix a possible amd-pstate-ut cpufreq driver crash introduced by
 a recent update (K Prateek Nayak)
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Merge tag 'pm-7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management fix from Rafael Wysocki:
 "Fix a possible amd-pstate-ut cpufreq driver crash introduced by a
  recent update (K Prateek Nayak)"

* tag 'pm-7.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq/amd-pstate-ut: Disable dynamic_epp after the mode switch
This commit is contained in:
Linus Torvalds 2026-05-28 13:30:28 -07:00
commit de85416e95
1 changed files with 10 additions and 6 deletions
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16
drivers/cpufreq/amd-pstate-ut.c
View File

@ -302,12 +302,6 @@ static int amd_pstate_ut_epp(u32 index)
cpufreq_cpu_put(policy);
policy = NULL;
/* disable dynamic EPP before running test */
if (cpudata->dynamic_epp) {
pr_debug("Dynamic EPP is enabled, disabling it\n");
amd_pstate_clear_dynamic_epp(policy);
}
buf = (char *)__get_free_page(GFP_KERNEL);
if (!buf)
return -ENOMEM;
@ -327,6 +321,16 @@ static int amd_pstate_ut_epp(u32 index)
orig_policy = cpudata->policy;
cpudata->policy = CPUFREQ_POLICY_POWERSAVE;
/*
* Disable dynamic EPP before running test. If "orig_dynamic_epp" is
* true, the driver will do a redundant switch at the end and there
* is no need for enabling it again at the end of the test.
*/
if (cpudata->dynamic_epp) {
pr_debug("Dynamic EPP is enabled, disabling it\n");
amd_pstate_clear_dynamic_epp(policy);
}
for (epp = 0; epp <= U8_MAX; epp++) {
u8 val;