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netdev: bfin_mac: check for mii_bus platform data

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If the platform data for the mii_bus is missing, gracefully error out
rather than deference NULL pointers.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sonic Zhang 2010-05-10 05:39:14 +00:00 committed by David S. Miller
parent 2bfa0f0c9a
commit 0e995cd3d3
1 changed files with 6 additions and 0 deletions
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6
drivers/net/bfin_mac.c
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@ -1466,6 +1466,11 @@ static int __devinit bfin_mac_probe(struct platform_device *pdev)
}
pd = pdev->dev.platform_data;
lp->mii_bus = platform_get_drvdata(pd);
if (!lp->mii_bus) {
dev_err(&pdev->dev, "Cannot get mii_bus!\n");
rc = -ENODEV;
goto out_err_mii_bus_probe;
}
lp->mii_bus->priv = ndev;
rc = mii_probe(ndev);
@ -1511,6 +1516,7 @@ out_err_request_irq:
out_err_mii_probe:
mdiobus_unregister(lp->mii_bus);
mdiobus_free(lp->mii_bus);
out_err_mii_bus_probe:
peripheral_free_list(pin_req);
out_err_probe_mac:
platform_set_drvdata(pdev, NULL);