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NET: Fix system hanging if NET device is not installed

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If we try to boot from NET device, NetInitLoop in net.c will be invoked.
If NET device is not installed, eth_get_dev() function will return
eth_current value, which is NULL.
When NetInitLoop is called, "eth_get_dev->enetaddr" will access
restricted memory area and therefore cause hanging.
This issue is found on Tegra30 Cardhu platform after adding
CONFIG_CMD_NET and CONFIG_CMD_DHCP in config header file.

Signed-off-by: Jim Lin <jilin@nvidia.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Jim Lin 2013-05-17 17:41:03 +08:00 • committed by Tom Rini
parent 2f99807125
commit 7315cfd9e1
1 changed files with 2 additions and 1 deletions
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3
net/net.c
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@ -271,7 +271,8 @@ static void NetInitLoop(void)
#endif
env_changed_id = env_id;
}
memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
if (eth_get_dev())
memcpy(NetOurEther, eth_get_dev()->enetaddr, 6);
return;
}