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ACPI fixes for 6.19-rc2

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Add a missing PCC check for guaranteed_perf in the ACPI CPPC
 library and fix a static local variable access race condition
 in acpi_pcc_address_space_setup() (Pengjie Zhang).
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Merge tag 'acpi-6.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI fixes from Rafael Wysocki:
 "These add a missing PCC check for guaranteed_perf in the ACPI CPPC
  library and fix a static local variable access race condition in
  acpi_pcc_address_space_setup() (Pengjie Zhang)"

* tag 'acpi-6.19-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: PCC: Fix race condition by removing static qualifier
  ACPI: CPPC: Fix missing PCC check for guaranteed_perf
This commit is contained in:
Linus Torvalds 2025-12-19 08:37:08 +12:00
commit 5caa3808bc
2 changed files with 3 additions and 2 deletions
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2
drivers/acpi/acpi_pcc.c
View File

@ -52,7 +52,7 @@ acpi_pcc_address_space_setup(acpi_handle region_handle, u32 function,
struct pcc_data *data;
struct acpi_pcc_info *ctx = handler_context;
struct pcc_mbox_chan *pcc_chan;
static acpi_status ret;
acpi_status ret;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)

3
drivers/acpi/cppc_acpi.c
View File

@ -1366,7 +1366,8 @@ int cppc_get_perf_caps(int cpunum, struct cppc_perf_caps *perf_caps)
/* Are any of the regs PCC ?*/
if (CPC_IN_PCC(highest_reg) || CPC_IN_PCC(lowest_reg) ||
CPC_IN_PCC(lowest_non_linear_reg) || CPC_IN_PCC(nominal_reg) ||
CPC_IN_PCC(low_freq_reg) || CPC_IN_PCC(nom_freq_reg)) {
CPC_IN_PCC(low_freq_reg) || CPC_IN_PCC(nom_freq_reg) ||
CPC_IN_PCC(guaranteed_reg)) {
if (pcc_ss_id < 0) {
pr_debug("Invalid pcc_ss_id\n");
return -ENODEV;