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gianfar: ethernet vanishes after restoring from hibernation 

If a gianfar ethernet device is down prior to hibernating a
system, it will no longer be present upon system restore.

For example:

	~# ifconfig eth0 down
	~# echo disk > /sys/power/state

	  <trigger a restore from hibernation>

	~# ifconfig eth0 up
	SIOCSIFFLAGS: No such device

This happens because the restore function bails out early upon
finding devices that were not up at hibernation.  In doing so,
it never gets to the netif_device_attach call at the end of
the restore function.  Adding the netif_device_attach as done
here also makes the gfar_restore code consistent with what is
done in the gfar_resume code.

Cc: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: Wang Dongsheng <dongsheng.wang@freescale.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wang Dongsheng 2012-11-09 04:43:51 +00:00 committed by David S. Miller
parent 9532021da6
commit 103cdd1d59
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/freescale/gianfar.c
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@ -1353,8 +1353,11 @@ static int gfar_restore(struct device *dev)
struct gfar_private *priv = dev_get_drvdata(dev);
struct net_device *ndev = priv->ndev;
if (!netif_running(ndev))
if (!netif_running(ndev)) {
netif_device_attach(ndev);
return 0;
}
gfar_init_bds(ndev);
init_registers(ndev);