In the Linux kernel, the following vulnerability has been resolved:[EOL][EOL]serial: pch: Fix PCI device refcount leak in pch_request_dma()[EOL][EOL]As comment of pci_get_slot() says, it returns a pci_device with its[EOL]refcount increased. The caller must decrement the reference count by[EOL]calling pci_dev_put().[EOL][EOL]Since 'dma_dev' is only used to filter the channel in filter(), we can[EOL]call pci_dev_put() before exiting from pch_request_dma(). Add the[EOL]missing pci_dev_put() for the normal and error path.
