[PATCH] PCI: dwc: solve returning success but actually failed

["Zhangjiantao(Kirin,Nanjing)" <water.zhangjiantao@xxxxxxxxxx>]

When dma_mapping_error returns error because of no enough memory available, dw_pcie_host_init will return success, which will mislead the callers.

Signed-off-by: zhangjianrong <zhangjianrong5@xxxxxxxxxx>
Signed-off-by: zhangjiantao <water.zhangjiantao@xxxxxxxxxx>

---
  drivers/pci/controller/dwc/pcie-designware-host.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c
b/drivers/pci/controller/dwc/pcie-designware-host.c
index f4755f3a03be..ac691d733848 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -393,6 +393,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
              if (dma_mapping_error(pci->dev, pp->msi_data)) {
                  dev_err(pci->dev, "Failed to map MSI data\n");
                  pp->msi_data = 0;
+                ret = -1;
                  goto err_free_msi;
              }
          }
--
2.17.1