2 files changed, 16 insertions, 2 deletions

diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 2e837f5080f..fb7a5f052e2 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -145,6 +145,15 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
                 percpu_entry->states[cx->index].eax = cx->address;
                 percpu_entry->states[cx->index].ecx = MWAIT_ECX_INTERRUPT_BREAK;
         }
+
+        /*
+         * For _CST FFH on Intel, if GAS.access_size bit 1 is cleared,
+         * then we should skip checking BM_STS for this C-state.
+         * ref: "Intel Processor Vendor-Specific ACPI Interface Specification"
+         */
+        if ((c->x86_vendor == X86_VENDOR_INTEL) && !(reg->access_size & 0x2))
+                cx->bm_sts_skip = 1;
+
         return retval;
 }
 EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe);
diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 82e508677b9..fcc3c61fdec 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -157,9 +157,14 @@ static int __init acpi_sleep_setup(char *str)
 #ifdef CONFIG_HIBERNATION
                 if (strncmp(str, "s4_nohwsig", 10) == 0)
                         acpi_no_s4_hw_signature();
-                if (strncmp(str, "s4_nonvs", 8) == 0)
-                        acpi_s4_no_nvs();
+                if (strncmp(str, "s4_nonvs", 8) == 0) {
+                        pr_warning("ACPI: acpi_sleep=s4_nonvs is deprecated, "
+                                        "please use acpi_sleep=nonvs instead");
+                        acpi_nvs_nosave();
+                }
 #endif
+                if (strncmp(str, "nonvs", 5) == 0)
+                        acpi_nvs_nosave();
                 if (strncmp(str, "old_ordering", 12) == 0)
                         acpi_old_suspend_ordering();
                 str = strchr(str, ',');