PCI: Don't enable aspm before drivers have had a chance to veto it

[pandora-kernel.git] / drivers / pci / pcie / aspm.c

diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index be53d98..7122281 100644 (file)
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -588,11 +588,23 @@ void pcie_aspm_init_link_state(struct pci_dev *pdev)
         * update through pcie_aspm_cap_init().
         */
        pcie_aspm_cap_init(link, blacklist);
-       pcie_config_aspm_path(link);
 
        /* Setup initial Clock PM state */
        pcie_clkpm_cap_init(link, blacklist);
-       pcie_set_clkpm(link, policy_to_clkpm_state(link));
+
+       /*
+        * At this stage drivers haven't had an opportunity to change the
+        * link policy setting. Enabling ASPM on broken hardware can cripple
+        * it even before the driver has had a chance to disable ASPM, so
+        * default to a safe level right now. If we're enabling ASPM beyond
+        * the BIOS's expectation, we'll do so once pci_enable_device() is
+        * called.
+        */
+       if (aspm_policy != POLICY_POWERSAVE) {
+               pcie_config_aspm_path(link);
+               pcie_set_clkpm(link, policy_to_clkpm_state(link));
+       }
+
 unlock:
        mutex_unlock(&aspm_lock);
 out: