gianfar: free/iounmap memory after an error in mii bus initialization

Recent changes to MII bus initialization code added exit points which
didn't free or iounmap the bus before returning.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11372.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Reported-by: Daniel Marjamki <danielm77@spray.se>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/net/gianfar_mii.c b/drivers/net/gianfar_mii.c
index 906aba2757e7..678f48c69119 100644
--- a/drivers/net/gianfar_mii.c
+++ b/drivers/net/gianfar_mii.c
@@ -211,19 +211,21 @@ static int gfar_mdio_probe(struct device *dev)
         gfar_write(&enet_regs->tbipa, 0);
         for (i = PHY_MAX_ADDR; i > 0; i--) {
                 u32 phy_id;
-                int r;
 
-                r = get_phy_id(new_bus, i, &phy_id);
-                if (r)
-                        return r;
+                err = get_phy_id(new_bus, i, &phy_id);
+                if (err)
+                        goto bus_register_fail;
 
                 if (phy_id == 0xffffffff)
                         break;
         }
 
         /* The bus is full.  We don't support using 31 PHYs, sorry */
-        if (i == 0)
-                return -EBUSY;
+        if (i == 0) {
+                err = -EBUSY;
+
+                goto bus_register_fail;
+        }
 
         gfar_write(&enet_regs->tbipa, i);