Hi Oza,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v4.16]
[cannot apply to pci/next linus/master next-20180410]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Oza-Pawandeep/Address-error-and-recovery-for-AER-and-DPC/20180410-045644
config: x86_64-randconfig-s4-04101607 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Oza-Pawandeep/Address-error-and-recovery-for-AER-and-DPC/20180410-045644 HEAD db413d3e52b272ef8e6f03ff125e65468abd31e6 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   drivers/pci/pcie/err.o: In function `reset_link':
>> drivers/pci/pcie/err.c:197: undefined reference to `find_aer_service'

vim +197 drivers/pci/pcie/err.c

   181	
   182	static pci_ers_result_t reset_link(struct pci_dev *dev)
   183	{
   184		struct pci_dev *udev;
   185		pci_ers_result_t status;
   186		struct pcie_port_service_driver *driver = NULL;
   187	
   188		if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
   189			/* Reset this port for all subordinates */
   190			udev = dev;
   191		} else {
   192			/* Reset the upstream component (likely downstream port) */
   193			udev = dev->bus->self;
   194		}
   195	
   196		/* Use the aer driver of the component firstly */
 > 197		driver = find_aer_service(udev);
   198	
   199		if (driver && driver->reset_link) {
   200			status = driver->reset_link(udev);
   201		} else if (udev->has_secondary_link) {
   202			status = default_reset_link(udev);
   203		} else {
   204			pci_printk(KERN_DEBUG, dev,
   205				"no link-reset support at upstream device %s\n",
   206				pci_name(udev));
   207			return PCI_ERS_RESULT_DISCONNECT;
   208		}
   209	
   210		if (status != PCI_ERS_RESULT_RECOVERED) {
   211			pci_printk(KERN_DEBUG, dev,
   212				"link reset at upstream device %s failed\n",
   213				pci_name(udev));
   214			return PCI_ERS_RESULT_DISCONNECT;
   215		}
   216	
   217		return status;
   218	}
   219	

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