Ming Lei wrote:
On Thu, May 17, 2012 at 10:23 AM, Xiao Jiang <jgq516@xxxxxxxxx> wrote:
Ming Lei wrote:
On Wed, May 16, 2012 at 4:01 PM, <jgq516@xxxxxxxxx> wrote:
From: Xiao Jiang <jgq516@xxxxxxxxx>
commit c26134 introduced FLAG_POINTTOPOINT flag for USB ethernet devices
which possibly use "usb%d" names, add this flag to make sure pandaboard
can mount nfs with smsc95xx NIC.
Without the flag, I also can mount nfs successfully on my Pandaboard...
I always mount nfs in console, and not tried to mount nfs as root fs.
I have pulled latest tree
(git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
commit 0e93b4b304ae052ba1bc73f6d34a68556fe93429), and enable related options
(USB_NET_SMSC95XX,
USB_EHCI_HCD and USB_EHCI_HCD_OMAP) with omap2plus_config, However the
kernel still can't mount
nfs, pls see below infos.
[ 3.114105] smsc95xx v1.0.4
[ 4.533752] smsc95xx 1-1.1:1.0: *eth0*: register 'smsc95xx' at
usb-ehci-omap.0-1.1, smsc95xx USB 2.0 Ethernet, fe:b9:1b:07:8e:d1
[ 108.854217] VFS: Unable to mount root fs via NFS, trying floppy.
[ 108.861114] VFS: Cannot open root device "nfs" or unknown-block(2,0):
error -6
[ 108.868713] Please append a correct "root=" boot option; here are the
available partitions:
[ 108.877655] b300 7761920 mmcblk0 driver: mmcblk
[ 108.883239] b301 40131 mmcblk0p1
00000000-0000-0000-0000-000000000mmcblk0p1
[ 108.891662] b302 7719232 mmcblk0p2
00000000-0000-0000-0000-000000000mmcblk0p2
[ 108.900146] Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)
BTW: I tested it with OMAP4430 ES2.2 pandaboard, the issue can be solved
with apply the patch.
Is there something which I missed? thanks.
What is your kernel parameter? Maybe you use 'usb%d' in kernel parameter for
mounting nfs as root fs. If so, could you try 'eth%d' in kernel cmd?
In fact, smsc95xx is a real LAN interface, and 'eth%d' should be prefered name
as described in changelog of commit
c261344d3ce3edac781f9d3c7eabe2e96d8e8fe8(usbnet:use eth%d name for
known ethernet devices)
Thanks for your notice, I used wrong kernel parameter.
Regards,
Xiao
Thanks,
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