powerpc/4xx: Don't unmap NULL mbase

Signed-off-by: huhai <huhai@tj.kylinos.cn>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200521072648.1254699-1-mpe@ellerman.id.au

diff --git a/arch/powerpc/platforms/4xx/pci.c b/arch/powerpc/platforms/4xx/pci.c
index e6e2adcc7b64ccfae8ad0474c6a845ee28f4e2da..c13d64c3b0194f469374dbc5d5b63ac69528b2c2 100644 (file)
--- a/arch/powerpc/platforms/4xx/pci.c
+++ b/arch/powerpc/platforms/4xx/pci.c
@@ -1242,7 +1242,7 @@ static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port)
        if (mbase == NULL) {
                printk(KERN_ERR "%pOF: Can't map internal config space !",
                        port->node);
-               goto done;
+               return;
        }
 
        while (attempt && (0 == (in_le32(mbase + PECFG_460SX_DLLSTA)
@@ -1252,9 +1252,7 @@ static void __init ppc460sx_pciex_check_link(struct ppc4xx_pciex_port *port)
        }
        if (attempt)
                port->link = 1;
-done:
        iounmap(mbase);
-
 }
 
 static struct ppc4xx_pciex_hwops ppc460sx_pcie_hwops __initdata = {