Unable to mount root fs via NFS

Hi everyone,

I try to boot a linux image on a DE10-Standard from a remote server but it always fails.
I followed the instructions at:

[    6.754299] IP-Config: Got DHCP answer from 192.168.0.254, my address is 192.168.0.87
[    6.762186] IP-Config: Complete:
[    6.765427]      device=eth0, hwaddr=aa:bb:cc:dd:ee:22, ipaddr=192.168.0.87, mask=255.255.255.0, gw=192.168.0.254
[    6.775653]      host=192.168.0.87, domain=, nis-domain=(none)
[    6.781461]      bootserver=0.0.0.0, rootserver=192.168.0.38, rootpath=     nameserver0=192.168.0.254
[    6.810974] ttyS0 - failed to request DMA
[  102.068868] VFS: Unable to mount root fs via NFS, trying floppy.
[  102.075124] VFS: Cannot open root device "nfs" or unknown-block(2,0): error -6
[  102.082314] Please append a correct "root=" boot option; here are the available partitions:
[  102.090656] 0100            8192 ram0  (driver?)
[  102.095284] 0101            8192 ram1  (driver?)
[  102.099894] b300        15126528 mmcblk0  driver: mmcblk
[  102.105208]   b301          512000 mmcblk0p1 55f3145b-01
[  102.110509]   b302         1048576 mmcblk0p2 55f3145b-02
[  102.115821]   b303            1024 mmcblk0p3 55f3145b-03
[  102.121121] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  102.129351] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.5.0-00200-g1ec9f95 #4
[  102.136452] Hardware name: Altera SOCFPGA
[  102.140476] [<c0018bd4>] (unwind_backtrace) from [<c001461c>] (show_stack+0x20/0x24)
[  102.148198] [<c001461c>] (show_stack) from [<c02ef6e8>] (dump_stack+0x8c/0xa0)
[  102.155399] [<c02ef6e8>] (dump_stack) from [<c00e30a8>] (panic+0xec/0x240)
[  102.162256] [<c00e30a8>] (panic) from [<c08e73c4>] (mount_block_root+0x1c8/0x2a0)
[  102.169710] [<c08e73c4>] (mount_block_root) from [<c08e76b4>] (mount_root+0x12c/0x134)
[  102.177595] [<c08e76b4>] (mount_root) from [<c08e7834>] (prepare_namespace+0x178/0x1bc)
[  102.185566] [<c08e7834>] (prepare_namespace) from [<c08e6f64>] (kernel_init_freeable+0x25c/0x270)
[  102.194412] [<c08e6f64>] (kernel_init_freeable) from [<c06a7b60>] (kernel_init+0x1c/0xf4)
[  102.202559] [<c06a7b60>] (kernel_init) from [<c000fe38>] (ret_from_fork+0x14/0x3c)
[  102.210097] CPU1: stopping
[  102.212798] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.5.0-00200-g1ec9f95 #4
[  102.219899] Hardware name: Altera SOCFPGA
[  102.223903] [<c0018bd4>] (unwind_backtrace) from [<c001461c>] (show_stack+0x20/0x24)
[  102.231621] [<c001461c>] (show_stack) from [<c02ef6e8>] (dump_stack+0x8c/0xa0)
[  102.238816] [<c02ef6e8>] (dump_stack) from [<c0017210>] (handle_IPI+0x2a8/0x2c4)
[  102.246183] [<c0017210>] (handle_IPI) from [<c0009538>] (gic_handle_irq+0x94/0x98)
[  102.253720] [<c0009538>] (gic_handle_irq) from [<c0015194>] (__irq_svc+0x54/0x70)
[  102.261168] Exception stack(0xef51bf48 to 0xef51bf90)
[  102.266200] bf40:                   00000000 ef9d0348 0000a900 c00219c0 ef51a000 c096a4a0
[  102.274342] bf60: 10c0387d c09dea34 c096a454 c096132c 00000000 ef51bfa4 ef51bfa8 ef51bf98
[  102.282482] bf80: c00108ec c00108f0 60000013 ffffffff
[  102.287516] [<c0015194>] (__irq_svc) from [<c00108f0>] (arch_cpu_idle+0x48/0x4c)
[  102.294890] [<c00108f0>] (arch_cpu_idle) from [<c0064a64>] (default_idle_call+0x30/0x3c)
[  102.302951] [<c0064a64>] (default_idle_call) from [<c0064c7c>] (cpu_startup_entry+0x20c/0x284)
[  102.311528] [<c0064c7c>] (cpu_startup_entry) from [<c0016cf4>] (secondary_start_kernel+0x16c/0x174)
[  102.320536] [<c0016cf4>] (secondary_start_kernel) from [<000095cc>] (0x95cc)
[  102.327560] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  218.356788] random: nonblocking pool is initialized


To solve this problem I tried to modify bootargs such as :

setenv bootargs console=ttyS0,115200 ip=dhcp root=/dev/nfs rw nfsroot=${nfsip}:${nfs-rootfs-dir},nfsvers=3

But it doesn’t work…
There is something that surprising me is that:
bootserver=0.0.0.0

Just to precise, I don’t use “.rbf” files, so I didn’t use any “fpga” command.

Has someone a solution for me?
Kind regards,