[PATCH] PCI-DW: ARM64: check the result of hos_init

[songxiaowei]

Enumeration should be prevented 
when Host initialization fails.
Only one device link with Host escpecially, 
if host initialization fails or
establishling link-up is not successful,
there may no need for the Enumeration.

Signed-off-by: songxiaowei <songxiao...@huawei.com>
---
 drivers/pci/host/pcie-designware.c | 7 +++++--
 drivers/pci/host/pcie-designware.h | 2 +-
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/host/pcie-designware.c 
b/drivers/pci/host/pcie-designware.c
index bed19994c1e9..561a2edaf06f 100644
--- a/drivers/pci/host/pcie-designware.c
+++ b/drivers/pci/host/pcie-designware.c
@@ -637,8 +637,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
                }
        }
 
-       if (pp->ops->host_init)
-               pp->ops->host_init(pp);
+       if (pp->ops->host_init) {
+               ret = pp->ops->host_init(pp);
+               if (ret)
+                       return ret;
+       }
 
        pp->root_bus_nr = pp->busn->start;
        if (IS_ENABLED(CONFIG_PCI_MSI)) {
diff --git a/drivers/pci/host/pcie-designware.h 
b/drivers/pci/host/pcie-designware.h
index a567ea288ee2..eacf18f9fc79 100644
--- a/drivers/pci/host/pcie-designware.h
+++ b/drivers/pci/host/pcie-designware.h
@@ -63,7 +63,7 @@ struct pcie_host_ops {
        int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
                        unsigned int devfn, int where, int size, u32 val);
        int (*link_up)(struct pcie_port *pp);
-       void (*host_init)(struct pcie_port *pp);
+       int (*host_init)(struct pcie_port *pp);
        void (*msi_set_irq)(struct pcie_port *pp, int irq);
        void (*msi_clear_irq)(struct pcie_port *pp, int irq);
        phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
-- 
2.11.GIT