diff options
Diffstat (limited to '1004_linux-3.2.5.patch')
| -rw-r--r-- | 1004_linux-3.2.5.patch | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/1004_linux-3.2.5.patch b/1004_linux-3.2.5.patch new file mode 100644 index 00000000..41f87f9e --- /dev/null +++ b/1004_linux-3.2.5.patch @@ -0,0 +1,205 @@ +diff --git a/Makefile b/Makefile +index c8e187e..e9dd0ff 100644 +--- a/Makefile ++++ b/Makefile +@@ -1,6 +1,6 @@ + VERSION = 3 + PATCHLEVEL = 2 +-SUBLEVEL = 4 ++SUBLEVEL = 5 + EXTRAVERSION = + NAME = Saber-toothed Squirrel + +diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c +index 2672c79..7aff631 100644 +--- a/drivers/acpi/pci_root.c ++++ b/drivers/acpi/pci_root.c +@@ -596,6 +596,13 @@ static int __devinit acpi_pci_root_add(struct acpi_device *device) + if (ACPI_SUCCESS(status)) { + dev_info(root->bus->bridge, + "ACPI _OSC control (0x%02x) granted\n", flags); ++ if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { ++ /* ++ * We have ASPM control, but the FADT indicates ++ * that it's unsupported. Clear it. ++ */ ++ pcie_clear_aspm(root->bus); ++ } + } else { + dev_info(root->bus->bridge, + "ACPI _OSC request failed (%s), " +diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c +index 4ecb640..c8e7585 100644 +--- a/drivers/pci/pci-acpi.c ++++ b/drivers/pci/pci-acpi.c +@@ -395,7 +395,6 @@ static int __init acpi_pci_init(void) + + if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM) { + printk(KERN_INFO"ACPI FADT declares the system doesn't support PCIe ASPM, so disable it\n"); +- pcie_clear_aspm(); + pcie_no_aspm(); + } + +diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c +index cbfbab1..1cfbf22 100644 +--- a/drivers/pci/pcie/aspm.c ++++ b/drivers/pci/pcie/aspm.c +@@ -68,7 +68,7 @@ struct pcie_link_state { + struct aspm_latency acceptable[8]; + }; + +-static int aspm_disabled, aspm_force, aspm_clear_state; ++static int aspm_disabled, aspm_force; + static bool aspm_support_enabled = true; + static DEFINE_MUTEX(aspm_lock); + static LIST_HEAD(link_list); +@@ -500,9 +500,6 @@ static int pcie_aspm_sanity_check(struct pci_dev *pdev) + int pos; + u32 reg32; + +- if (aspm_clear_state) +- return -EINVAL; +- + /* + * Some functions in a slot might not all be PCIe functions, + * very strange. Disable ASPM for the whole slot +@@ -574,9 +571,6 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) + pdev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM) + return; + +- if (aspm_disabled && !aspm_clear_state) +- return; +- + /* VIA has a strange chipset, root port is under a bridge */ + if (pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT && + pdev->bus->self) +@@ -608,7 +602,7 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev) + * the BIOS's expectation, we'll do so once pci_enable_device() is + * called. + */ +- if (aspm_policy != POLICY_POWERSAVE || aspm_clear_state) { ++ if (aspm_policy != POLICY_POWERSAVE) { + pcie_config_aspm_path(link); + pcie_set_clkpm(link, policy_to_clkpm_state(link)); + } +@@ -649,8 +643,7 @@ void pcie_aspm_exit_link_state(struct pci_dev *pdev) + struct pci_dev *parent = pdev->bus->self; + struct pcie_link_state *link, *root, *parent_link; + +- if ((aspm_disabled && !aspm_clear_state) || !pci_is_pcie(pdev) || +- !parent || !parent->link_state) ++ if (!pci_is_pcie(pdev) || !parent || !parent->link_state) + return; + if ((parent->pcie_type != PCI_EXP_TYPE_ROOT_PORT) && + (parent->pcie_type != PCI_EXP_TYPE_DOWNSTREAM)) +@@ -734,13 +727,18 @@ void pcie_aspm_powersave_config_link(struct pci_dev *pdev) + * pci_disable_link_state - disable pci device's link state, so the link will + * never enter specific states + */ +-static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem) ++static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem, ++ bool force) + { + struct pci_dev *parent = pdev->bus->self; + struct pcie_link_state *link; + +- if (aspm_disabled || !pci_is_pcie(pdev)) ++ if (aspm_disabled && !force) ++ return; ++ ++ if (!pci_is_pcie(pdev)) + return; ++ + if (pdev->pcie_type == PCI_EXP_TYPE_ROOT_PORT || + pdev->pcie_type == PCI_EXP_TYPE_DOWNSTREAM) + parent = pdev; +@@ -768,16 +766,31 @@ static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem) + + void pci_disable_link_state_locked(struct pci_dev *pdev, int state) + { +- __pci_disable_link_state(pdev, state, false); ++ __pci_disable_link_state(pdev, state, false, false); + } + EXPORT_SYMBOL(pci_disable_link_state_locked); + + void pci_disable_link_state(struct pci_dev *pdev, int state) + { +- __pci_disable_link_state(pdev, state, true); ++ __pci_disable_link_state(pdev, state, true, false); + } + EXPORT_SYMBOL(pci_disable_link_state); + ++void pcie_clear_aspm(struct pci_bus *bus) ++{ ++ struct pci_dev *child; ++ ++ /* ++ * Clear any ASPM setup that the firmware has carried out on this bus ++ */ ++ list_for_each_entry(child, &bus->devices, bus_list) { ++ __pci_disable_link_state(child, PCIE_LINK_STATE_L0S | ++ PCIE_LINK_STATE_L1 | ++ PCIE_LINK_STATE_CLKPM, ++ false, true); ++ } ++} ++ + static int pcie_aspm_set_policy(const char *val, struct kernel_param *kp) + { + int i; +@@ -935,6 +948,7 @@ void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) + static int __init pcie_aspm_disable(char *str) + { + if (!strcmp(str, "off")) { ++ aspm_policy = POLICY_DEFAULT; + aspm_disabled = 1; + aspm_support_enabled = false; + printk(KERN_INFO "PCIe ASPM is disabled\n"); +@@ -947,16 +961,18 @@ static int __init pcie_aspm_disable(char *str) + + __setup("pcie_aspm=", pcie_aspm_disable); + +-void pcie_clear_aspm(void) +-{ +- if (!aspm_force) +- aspm_clear_state = 1; +-} +- + void pcie_no_aspm(void) + { +- if (!aspm_force) ++ /* ++ * Disabling ASPM is intended to prevent the kernel from modifying ++ * existing hardware state, not to clear existing state. To that end: ++ * (a) set policy to POLICY_DEFAULT in order to avoid changing state ++ * (b) prevent userspace from changing policy ++ */ ++ if (!aspm_force) { ++ aspm_policy = POLICY_DEFAULT; + aspm_disabled = 1; ++ } + } + + /** +diff --git a/include/linux/pci-aspm.h b/include/linux/pci-aspm.h +index 7cea7b6..c832014 100644 +--- a/include/linux/pci-aspm.h ++++ b/include/linux/pci-aspm.h +@@ -29,7 +29,7 @@ extern void pcie_aspm_pm_state_change(struct pci_dev *pdev); + extern void pcie_aspm_powersave_config_link(struct pci_dev *pdev); + extern void pci_disable_link_state(struct pci_dev *pdev, int state); + extern void pci_disable_link_state_locked(struct pci_dev *pdev, int state); +-extern void pcie_clear_aspm(void); ++extern void pcie_clear_aspm(struct pci_bus *bus); + extern void pcie_no_aspm(void); + #else + static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) +@@ -47,7 +47,7 @@ static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) + static inline void pci_disable_link_state(struct pci_dev *pdev, int state) + { + } +-static inline void pcie_clear_aspm(void) ++static inline void pcie_clear_aspm(struct pci_bus *bus) + { + } + static inline void pcie_no_aspm(void) |