PCI: pciehp: Simplify "Power Fault Detected" checking/clearing

It's simpler to test the PCI_EXP_SLTSTA_PFD bit directly and to write the
constant back to PCI_EXP_SLTSTA.

No functional change.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index 55109d6..cb3100a 100644 (file)
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -501,9 +501,9 @@ int pciehp_power_on_slot(struct slot * slot)
 
        /* Clear sticky power-fault bit from previous power failures */
        pcie_capability_read_word(pdev, PCI_EXP_SLTSTA, &slot_status);
-       slot_status &= PCI_EXP_SLTSTA_PFD;
-       if (slot_status)
-               pcie_capability_write_word(pdev, PCI_EXP_SLTSTA, slot_status);
+       if (slot_status & PCI_EXP_SLTSTA_PFD)
+               pcie_capability_write_word(pdev, PCI_EXP_SLTSTA,
+                                          PCI_EXP_SLTSTA_PFD);
        ctrl->power_fault_detected = 0;
 
        slot_cmd = POWER_ON;