natsemi driver does not have write_hwaddr function.
However, eth stuff executes write_hwaddr function
because eth_device structure has not been initialized.

Signed-off-by: Nobuhiro Iwamatsu <iwama...@nigauri.org>
CC: Ben Warren <biggerbadder...@gmail.com>
---
 drivers/net/natsemi.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index e09da1d..072ea3a 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -321,6 +321,11 @@ natsemi_initialize(bd_t * bis)
                }
 
                dev = (struct eth_device *) malloc(sizeof *dev);
+               if (!dev) {
+                       printf("natsemi: Can not allocate memory\n");
+                       break;
+               }
+               memset(dev, 0, sizeof(*dev));
 
                sprintf(dev->name, "dp83815#%d", card_number);
                dev->iobase = bus_to_phys(iobase);
-- 
1.7.1

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