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authorLinus Torvalds <torvalds@linux-foundation.org>2011-05-23 15:39:34 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-05-23 15:39:34 -0700
commit5e152b4c9e0fce6149c74406346a7ae7e7a17727 (patch)
tree12503a50142797c1babfd87099c193b3e4d54f93 /drivers/pci/pcie/aspm.c
parenta77febbef105554c5a37241cf903f48ab7bc03c7 (diff)
parent9251bac97d47fdaea406ea0595c2d0aa50022f12 (diff)
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Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
* 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: (27 commits) PCI: Don't use dmi_name_in_vendors in quirk PCI: remove unused AER functions PCI/sysfs: move bus cpuaffinity to class dev_attrs PCI: add rescan to /sys/.../pci_bus/.../ PCI: update bridge resources to get more big ranges when allocating space (again) KVM: Use pci_store/load_saved_state() around VM device usage PCI: Add interfaces to store and load the device saved state PCI: Track the size of each saved capability data area PCI/e1000e: Add and use pci_disable_link_state_locked() x86/PCI: derive pcibios_last_bus from ACPI MCFG PCI: add latency tolerance reporting enable/disable support PCI: add OBFF enable/disable support PCI: add ID-based ordering enable/disable support PCI hotplug: acpiphp: assume device is in state D0 after powering on a slot. PCI: Set PCIE maxpayload for card during hotplug insertion PCI/ACPI: Report _OSC control mask returned on failure to get control x86/PCI: irq and pci_ids patch for Intel Panther Point DeviceIDs PCI: handle positive error codes PCI: check pci_vpd_pci22_wait() return PCI: Use ICH6_GPIO_EN in ich6_lpc_acpi_gpio ... Fix up trivial conflicts in include/linux/pci_ids.h: commit a6e5e2be4461 moved the intel SMBUS ID definitons to the i2c-i801.c driver.
Diffstat (limited to 'drivers/pci/pcie/aspm.c')
-rw-r--r--drivers/pci/pcie/aspm.c21
1 files changed, 17 insertions, 4 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index eee09f7..6892601 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -608,7 +608,7 @@ 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) {
+ if (aspm_policy != POLICY_POWERSAVE || aspm_clear_state) {
pcie_config_aspm_path(link);
pcie_set_clkpm(link, policy_to_clkpm_state(link));
}
@@ -734,7 +734,7 @@ 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
*/
-void pci_disable_link_state(struct pci_dev *pdev, int state)
+static void __pci_disable_link_state(struct pci_dev *pdev, int state, bool sem)
{
struct pci_dev *parent = pdev->bus->self;
struct pcie_link_state *link;
@@ -747,7 +747,8 @@ void pci_disable_link_state(struct pci_dev *pdev, int state)
if (!parent || !parent->link_state)
return;
- down_read(&pci_bus_sem);
+ if (sem)
+ down_read(&pci_bus_sem);
mutex_lock(&aspm_lock);
link = parent->link_state;
if (state & PCIE_LINK_STATE_L0S)
@@ -761,7 +762,19 @@ void pci_disable_link_state(struct pci_dev *pdev, int state)
pcie_set_clkpm(link, 0);
}
mutex_unlock(&aspm_lock);
- up_read(&pci_bus_sem);
+ if (sem)
+ up_read(&pci_bus_sem);
+}
+
+void pci_disable_link_state_locked(struct pci_dev *pdev, int state)
+{
+ __pci_disable_link_state(pdev, state, 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);
}
EXPORT_SYMBOL(pci_disable_link_state);