From 8b8bae901ce23addbdcdb54fa1696fb2d049feb5 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sat, 5 Mar 2011 13:21:51 +0100 Subject: PCI/ACPI: Report ASPM support to BIOS if not disabled from command line MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We need to distinguish the situation in which ASPM support is disabled from the command line or through .config from the situation in which it is disabled, because the hardware or BIOS can't handle it. In the former case we should not report ASPM support to the BIOS through ACPI _OSC, but in the latter case we should do that. Introduce pcie_aspm_support_enabled() that can be used by acpi_pci_root_add() to determine whether or not it should report ASPM support to the BIOS through _OSC. Cc: stable@kernel.org References: https://bugzilla.kernel.org/show_bug.cgi?id=29722 References: https://bugzilla.kernel.org/show_bug.cgi?id=20232 Reported-and-tested-by: Ortwin Glück Reviewed-by: Kenji Kaneshige Tested-by: Kenji Kaneshige Signed-off-by: Rafael J. Wysocki Signed-off-by: Jesse Barnes --- include/linux/pci.h | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/pci.h b/include/linux/pci.h index 16c9f2e61977..96f70d7e058d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1002,12 +1002,11 @@ extern bool pcie_ports_auto; #endif #ifndef CONFIG_PCIEASPM -static inline int pcie_aspm_enabled(void) -{ - return 0; -} +static inline int pcie_aspm_enabled(void) { return 0; } +static inline bool pcie_aspm_support_enabled(void) { return false; } #else extern int pcie_aspm_enabled(void); +extern bool pcie_aspm_support_enabled(void); #endif #ifdef CONFIG_PCIEAER -- cgit v1.2.3