[PATCH] ppc64 Fix unbalanced pci_dev_put in EEH code

[PATCH] ppc64 Fix unbalanced pci_dev_put in EEH code

The EEH code currently can end up doing an extra pci_dev_put() in the case
where we hot-unplug a card for which we are ignoring EEH errors (e.g.  a
graphics card).  This patch fixes that problem by only maintaining a
reference to the PCI device if we have entered any of its resource
addresses into our address -> PCI device cache.  This patch is based on an
earlier patch by Linas Vepstas.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>