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Alex Chiang and Matthew Wilcox pointed out that pci_get_dev_by_id() does not properly decrement the reference on the from pointer if it is present, like the documentation for the function states it will. It fixes a pretty bad leak in the hotplug core (we were leaking an entire struct pci_dev for each function of each offlined card, the first time around; subsequent onlines/offlines were ok). Cc: Matthew Wilcox <matthew@wil.cx> Cc: stable <stable@kernel.org> Tested-by: Alex Chiang <achiang@hp.com> Acked-by: Alex Chiang <achiang@hp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>