diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/pci/pcie/aspm.c | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c index 721e5c787cf3..0c5d392dc793 100644 --- a/drivers/pci/pcie/aspm.c +++ b/drivers/pci/pcie/aspm.c @@ -191,48 +191,6 @@ static void pcie_clkpm_cap_init(struct pcie_link_state *link, int blacklist) link->clkpm_disable = blacklist ? 1 : 0; } -/** - * pcie_wait_for_link_status - Wait for link training end - * @pdev: Device whose link to wait for. - * - * Return TRUE if successful, or FALSE if training has not completed - * within PCIE_LINK_RETRAIN_TIMEOUT_MS milliseconds. - */ -static bool pcie_wait_for_link_status(struct pci_dev *pdev) -{ - unsigned long end_jiffies; - u16 lnksta; - - end_jiffies = jiffies + msecs_to_jiffies(PCIE_LINK_RETRAIN_TIMEOUT_MS); - do { - pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnksta); - if (!(lnksta & PCI_EXP_LNKSTA_LT)) - break; - msleep(1); - } while (time_before(jiffies, end_jiffies)); - return !(lnksta & PCI_EXP_LNKSTA_LT); -} - -static bool pcie_retrain_link(struct pci_dev *pdev) -{ - u16 lnkctl; - - pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &lnkctl); - lnkctl |= PCI_EXP_LNKCTL_RL; - pcie_capability_write_word(pdev, PCI_EXP_LNKCTL, lnkctl); - if (pdev->clear_retrain_link) { - /* - * Due to an erratum in some devices the Retrain Link bit - * needs to be cleared again manually to allow the link - * training to succeed. - */ - lnkctl &= ~PCI_EXP_LNKCTL_RL; - pcie_capability_write_word(pdev, PCI_EXP_LNKCTL, lnkctl); - } - - return pcie_wait_for_link_status(pdev); -} - /* * pcie_aspm_configure_common_clock: check if the 2 ends of a link * could use common clock. If they are, configure them to use the |