【已解决】rpcbind: server 10.0.1.9 not responding, timed out

【已解决】rpcbind: server 10.0.1.9 not responding, timed out

【问题】
网卡驱动加载后，无法mount rootfs：
———————————————————————————————–
[    2.940000] ieee80211: 802.11 data/management/control stack, git-1.1.13
[    2.950000] ieee80211: Copyright (C) 2004-2005 Intel Corporation <[email protected]>
[    3.490000] net eth0: link down
[    3.490000] net eth0: normal mode
[    3.500000] net eth0: multicast mode
[    3.500000] net eth0: multicast mode
[    4.510000] IP-Config: Complete:
[    4.510000]       device=eth0, addr=10.0.1.11, mask=255.255.255.0, gw=255.255.255.255,
[    4.520000]      host=enc28j60, domain=, nis-domain=(none),
[    4.520000]      bootserver=10.0.1.9, rootserver=10.0.1.9, rootpath=
[    4.530000] Looking up port of RPC 100003/2 on 10.0.1.9
[   39.540000] rpcbind: server 10.0.1.9 not responding, timed out
[   39.540000] Root-NFS: Unable to get nfsd port number from server, using default
[   39.550000] Looking up port of RPC 100005/1 on 10.0.1.9
[   74.560000] rpcbind: server 10.0.1.9 not responding, timed out
[   74.560000] Root-NFS: Unable to get mountd port number from server, using default
[ 109.570000] mount: server 10.0.1.9 not responding, timed out
[ 109.570000] Root-NFS: Server returned error -5 while mounting /home/nfs/rootfs
[ 109.580000] VFS: Unable to mount root fs via NFS, trying floppy.
[ 109.590000] VFS: Cannot open root device "nfs" or unknown-block(2,0)
[ 109.600000] Please append a correct "root=" boot option; here are the available partitions:
[ 109.600000] 1f00        512 mtdblock0 (driver?)
[ 109.610000] 1f01       8192 mtdblock1 (driver?)
[ 109.610000] 1f02      65536 mtdblock2 (driver?)
[ 109.620000] 1f03     187392 mtdblock3 (driver?)
[ 109.620000] Kernel panic – not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
———————————————————————————————–

而对于正常的，加载驱动，并且mount rootfs的输出是：
———————————————————————————————–
[    2.720000] ieee80211: 802.11 data/management/control stack, git-1.1.13
[    2.730000] ieee80211: Copyright (C) 2004-2005 Intel Corporation <[email protected]>
[    3.270000] net eth0: link down
[    3.270000] net eth0: normal mode
[    3.280000] net eth0: multicast mode
[    3.280000] net eth0: multicast mode
[    3.320000] net eth0: link up – Half duplex
[    4.300000] IP-Config: Complete:
[    4.300000]       device=eth0, addr=10.0.1.11, mask=255.255.255.0, gw=255.255.255.255,
[    4.310000]      host=enc28j60, domain=, nis-domain=(none),
[    4.310000]      bootserver=10.0.1.9, rootserver=10.0.1.9, rootpath=
[    4.320000] Looking up port of RPC 100003/2 on 10.0.1.9
[    4.360000] Looking up port of RPC 100005/1 on 10.0.1.9
[    4.460000] VFS: Mounted root (nfs filesystem).
[    4.470000] Freeing init memory: 100K
———————————————————————————————–

可以看出，是少了：
net eth0: link up – Half duplex
这一步，

最后的最后，终于搞清楚了，
原来是网卡驱动：

driversnetenc28j60.c中的probe函数：
static int __devinit enc28j60_probe(struct spi_device *spi)

中间，用到了GPIO2的初始化，去配置GPIO2，
而此处我的代码由于进行功耗管理，而在初始化的时候，将原先打开GPIO的clock关闭了，
导致此处虽然还是可以去配置gpio，但是实际没起效果，导致后面的网卡不能link up。

【解决办法】
确保网卡驱动初始化的时候涉及的clock时钟，都要开启，包括此处用到的GPIO的时钟，也要先打开。

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