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

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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>
This commit is contained in:
Rafael J. Wysocki 2011-01-07 00:55:09 +01:00 • committed by Jesse Barnes
commit 415e12b237
10 changed files with 72 additions and 46 deletions
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6
include/linux/pci-acpi.h
View file

@ -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_ */

11
include/linux/pci.h
View file

@ -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)
{