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authorBjorn Helgaas <bhelgaas@google.com>2013-04-09 16:46:12 -0600
committerBjorn Helgaas <bhelgaas@google.com>2013-04-15 14:30:44 -0600
commit545d7b78e0bbe686056cdd6cd431ca1946641b31 (patch)
tree86495cc7c7ec4dd824e0e4d72c4c11a886725d37
parent05795726e82372d3fe46210fcb3320f1fa49aea7 (diff)
downloadlinux-545d7b78e0bbe686056cdd6cd431ca1946641b31.tar.bz2
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>
-rw-r--r--drivers/pci/hotplug/pciehp_acpi.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/hotplug/pciehp_acpi.c b/drivers/pci/hotplug/pciehp_acpi.c
index 24d709b7388c..ead7c534095e 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++;