[PATCH] PCI: don't enable device if already enabled

If a device is already enabled, don't bother reenabling it.

Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Acked-By: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index fde41cc14734..aa480370ef10 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -517,7 +517,12 @@ pci_enable_device_bars(struct pci_dev *dev, int bars)
 int
 pci_enable_device(struct pci_dev *dev)
 {
-        int err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
+        int err;
+
+        if (dev->is_enabled)
+                return 0;
+
+        err = pci_enable_device_bars(dev, (1 << PCI_NUM_RESOURCES) - 1);
         if (err)
                 return err;
         pci_fixup_device(pci_fixup_enable, dev);