PCI: dwc: endpoint: Clear outbound address on unmap

Clear the address mapped (outbound_addr array) in dw_pcie_ep_unmap_addr(),
to ensure that dw_pcie_find_index() does not match an ATU index that was
already unmapped.

This is in addition to clearing the ATU index bit in ob_window_map.

Link: https://lore.kernel.org/linux-pci/[email protected]
Signed-off-by: Damien Le Moal <[email protected]>
[kwilczynski: commit log]
Signed-off-by: Krzysztof Wilczyński <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>

Author: damien-lemoal

drivers/pci/controller/dwc/pcie-designware-ep.c

@@ -280,6 +280,7 @@ static void dw_pcie_ep_unmap_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no,
 	if (ret < 0)
 		return;
 
+	ep->outbound_addr[atu_index] = 0;
 	dw_pcie_disable_atu(pci, PCIE_ATU_REGION_DIR_OB, atu_index);
 	clear_bit(atu_index, ep->ob_window_map);
 }