pci: allow multiple calls to pcim_enable_device()
There's no reason not to allow multiple calls to pcim_enable_device().
Calls after the first one can simply be noop. All PCI resources will
be released when the initial pcim_enable_device() resource is
released.
This allows more flexibility to managed PCI users.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 71d561fd..7d4ce90 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -823,7 +823,8 @@
dr = get_pci_dr(pdev);
if (unlikely(!dr))
return -ENOMEM;
- WARN_ON(!!dr->enabled);
+ if (dr->enabled)
+ return 0;
rc = pci_enable_device(pdev);
if (!rc) {
