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PCI: Use PCI_EXP_SLTCAP_PSN mask when extracting slot number 

Use PCI_EXP_SLTCAP_PSN mask to make it easier to find where the
Physical Slot Number is used.

The Physical Slot Number is bits 31:19 of the Slot Capabilities Register,
and slot_cap is a u32, so the mask is technically unnecessary, but it's
helpful for human readers.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
hifive-unleashed-5.1
Bjorn Helgaas 2013-04-09 16:46:12 -06:00
parent 05795726e8
commit 545d7b78e0
1 changed files with 1 additions and 1 deletions
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2
drivers/pci/hotplug/pciehp_acpi.c
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@ -90,7 +90,7 @@ static int __init dummy_probe(struct pcie_device *dev)
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
return -ENOMEM;
slot->number = slot_cap >> 19;
slot->number = (slot_cap & PCI_EXP_SLTCAP_PSN) >> 19;
list_for_each_entry(tmp, &dummy_slots, list) {
if (tmp->number == slot->number)
dup_slot_id++;