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x86/PCI: MMCONFIG: Check earlier for MMCONFIG region at address zero
authorethan.zhao <ethan.zhao@oracle.com>
Fri, 26 Jul 2013 17:21:24 +0000 (11:21 -0600)
committerBjorn Helgaas <bhelgaas@google.com>
Fri, 26 Jul 2013 17:21:24 +0000 (11:21 -0600)
We can check for addr being zero earlier and thus avoid the mutex_unlock()
cleanup path.

[bhelgaas: drop warning printk]
Signed-off-by: ethan.zhao <ethan.zhao@oracle.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>

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