PCI/ACPI: Request _OSC control once for each root bridge (v3)

Move the evaluation of acpi_pci_osc_control_set() (to request control of
PCI Express native features) into acpi_pci_root_add() to avoid calling
it many times for the same root complex with the same arguments.
Additionally, check if all of the requisite _OSC support bits are set
before calling acpi_pci_osc_control_set() for a given root complex.

References: https://bugzilla.kernel.org/show_bug.cgi?id=20232
Reported-by: Ozan Caglayan <ozan@pardus.org.tr>
Tested-by: Ozan Caglayan <ozan@pardus.org.tr>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

3 files changed, 23 insertions, 0 deletions

diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index b3365025ff8d..c4dbb132d902 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -19,6 +19,12 @@
 extern int hest_disable;
 extern int erst_disable;
 
+#ifdef CONFIG_ACPI_APEI
+void __init acpi_hest_init(void);
+#else
+static inline void acpi_hest_init(void) { return; }
+#endif
+
 typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
 int apei_hest_parse(apei_hest_func_t func, void *data);
 
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h
index c8b6473c5f42..479d9bb88e11 100644
--- a/include/linux/pci-acpi.h
+++ b/include/linux/pci-acpi.h
@@ -40,4 +40,10 @@ static inline acpi_handle acpi_find_root_bridge_handle(struct pci_dev *pdev)
 { return NULL; }
 #endif
 
+#ifdef CONFIG_ACPI_APEI
+extern bool aer_acpi_firmware_first(void);
+#else
+static inline bool aer_acpi_firmware_first(void) { return false; }
+#endif
+
 #endif  /* _PCI_ACPI_H_ */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 63cbadce337e..12dd86a82a15 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -994,6 +994,9 @@ extern void pci_restore_msi_state(struct pci_dev *dev);
 extern int pci_msi_enabled(void);
 #endif
 
+extern bool pcie_ports_disabled;
+extern bool pcie_ports_auto;
+
 #ifndef CONFIG_PCIEASPM
 static inline int pcie_aspm_enabled(void)
 {
@@ -1003,6 +1006,14 @@ static inline int pcie_aspm_enabled(void)
 extern int pcie_aspm_enabled(void);
 #endif
 
+#ifdef CONFIG_PCIEAER
+void pci_no_aer(void);
+bool pci_aer_available(void);
+#else
+static inline void pci_no_aer(void) { }
+static inline bool pci_aer_available(void) { return false; }
+#endif
+
 #ifndef CONFIG_PCIE_ECRC
 static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
 {