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PCI/ASPM: Simplify Clock Power Management setting 

Update the Link Control Enable Clock Power Management bit the same
way we update the ASPM Control bits, with a single call of
pcie_capability_clear_and_set_word().

No functional change; this just makes both paths use the same style.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2015-06-10 14:00:21 -05:00
parent 777e61ea40
commit 0c0cbb6c5a
1 changed files with 5 additions and 8 deletions
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13
drivers/pci/pcie/aspm.c
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@ -127,15 +127,12 @@ static void pcie_set_clkpm_nocheck(struct pcie_link_state *link, int enable)
{
struct pci_dev *child;
struct pci_bus *linkbus = link->pdev->subordinate;
u32 val = enable ? PCI_EXP_LNKCTL_CLKREQ_EN : 0;
list_for_each_entry(child, &linkbus->devices, bus_list) {
if (enable)
pcie_capability_set_word(child, PCI_EXP_LNKCTL,
PCI_EXP_LNKCTL_CLKREQ_EN);
else
pcie_capability_clear_word(child, PCI_EXP_LNKCTL,
PCI_EXP_LNKCTL_CLKREQ_EN);
}
list_for_each_entry(child, &linkbus->devices, bus_list)
pcie_capability_clear_and_set_word(child, PCI_EXP_LNKCTL,
PCI_EXP_LNKCTL_CLKREQ_EN,
val);
link->clkpm_enabled = !!enable;
}