From 545d7b78e0bbe686056cdd6cd431ca1946641b31 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 9 Apr 2013 16:46:12 -0600 Subject: [PATCH] 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 --- drivers/pci/hotplug/pciehp_acpi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c index 24d709b..ead7c53 100644 --- a/drivers/pci/hotplug/pciehp_acpi.c +++ b/drivers/pci/hotplug/pciehp_acpi.c @@ -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++; -- 2.7.4