uboot doesn't pass bootargs to kernel (2 replies)

Hi, I'm fighting half of the day and slowly giving up.
Nsa320 with latest debian and kernel on usb stick and latest uboot with default settings (env default -a). When booting I get an error:

[    7.268011] NET: Registered protocol family 17
[    7.272551] Key type dns_resolver registered
[    7.276898] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl F300)
[    7.284314] registered taskstats version 1
[    7.288536] ata1.00: ATA-8: ST3500312CS, SC13, max UDMA/133
[    7.288543] ata1.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[    7.301440] Loading compiled-in X.509 certificates
[    7.306346] ata1.00: configured for UDMA/133
[    7.310872] zswap: loaded using pool lzo/zbud
[    7.316568] scsi 0:0:0:0: Direct-Access     ATA      ST3500312CS      SC13 PQ: 0 ANSI: 5
[    7.326019] sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/466 GiB)
[    7.334578] sd 0:0:0:0: [sda] Write Protect is off
[    7.340585] Key type big_key registered
[    7.345054] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    7.355665] Key type encrypted registered
[    7.361099] rtc-mv f1010300.rtc: setting system clock to 2013-01-02 01:55:49 UTC (1357091749)
[    7.424427]  sda: sda1
[    7.428526] sd 0:0:0:0: [sda] Attached SCSI disk
[    7.566164] usb 1-1: new high-speed USB device number 2 using orion-ehci
[    7.757882] usb 1-1: New USB device found, idVendor=05e3, idProduct=0608
[    7.764632] usb 1-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0
[    7.771841] usb 1-1: Product: USB2.0 Hub
[    7.776681] hub 1-1:1.0: USB hub found
[    7.780756] hub 1-1:1.0: 4 ports detected
[    7.836182] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl F300)
[    7.876216] ata2.00: ATA-8: ST31500341AS, CC1H, max UDMA/133
[    7.881904] ata2.00: 2930277168 sectors, multi 0: LBA48 NCQ (depth 31/32)
[    7.946219] ata2.00: configured for UDMA/133
[    7.961060] scsi 1:0:0:0: Direct-Access     ATA      ST31500341AS     CC1H PQ: 0 ANSI: 5
[    7.970309] sd 1:0:0:0: [sdb] 2930277168 512-byte logical blocks: (1.50 TB/1.36 TiB)
[    7.978536] sd 1:0:0:0: [sdb] Write Protect is off
[    7.983473] sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[    8.022020]  sdb: sdb1
[    8.025810] sd 1:0:0:0: [sdb] Attached SCSI disk
[    8.030712] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[    8.038332] Please append a correct "root=" boot option; here are the available partitions:
[    8.046844] 1f00            1024 mtdblock0
[    8.046850]  (driver?)
[    8.053454] 1f01             512 mtdblock1
[    8.053459]  (driver?)
[    8.060073] 1f02             512 mtdblock2
[    8.060077]  (driver?)
[    8.066683] 1f03             512 mtdblock3
[    8.066687]  (driver?)
[    8.073255] 1f04           10240 mtdblock4
[    8.073258]  (driver?)
[    8.079848] 1f05           10240 mtdblock5
[    8.079852]  (driver?)
[    8.086450] 1f06           48896 mtdblock6
[    8.086454]  (driver?)
[    8.093022] 1f07           10240 mtdblock7
[    8.093026]  (driver?)
[    8.099608] 1f08           48896 mtdblock8
[    8.099612]  (driver?)
[    8.106201] 0800       488386584 sda
[    8.106206]  driver: sd
[    8.112348]   0801       488385560 sda1 00006160-01
[    8.112351]
[    8.117290] usb 1-1.4: new high-speed USB device number 3 using orion-ehci
[    8.125797] 0810      1465138584 sdb
[    8.125803]  driver: sd
[    8.131976]   0811      1465137560 sdb1 0009472b-01
[    8.131980]
[    8.138413] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    8.146712] CPU: 0 PID: 1 Comm: swapper Not tainted 4.12.1-kirkwood-tld-1 #1
[    8.153788] Hardware name: Marvell Kirkwood (Flattened Device Tree)
[    8.160108] [<c010ea54>] (unwind_backtrace) from [<c010ab48>] (show_stack+0x10/0x14)
[    8.167897] [<c010ab48>] (show_stack) from [<c01dba9c>] (panic+0xb0/0x250)
[    8.174816] [<c01dba9c>] (panic) from [<c0c01274>] (mount_block_root+0x204/0x27c)
[    8.182337] [<c0c01274>] (mount_block_root) from [<c0c013d8>] (mount_root+0xec/0x118)
[    8.190201] [<c0c013d8>] (mount_root) from [<c0c01528>] (prepare_namespace+0x124/0x184)
[    8.198242] [<c0c01528>] (prepare_namespace) from [<c0c00e90>] (kernel_init_freeable+0x210/0x260)
[    8.207160] [<c0c00e90>] (kernel_init_freeable) from [<c0833200>] (kernel_init+0x8/0x10c)
[    8.215380] [<c0833200>] (kernel_init) from [<c01070f0>] (ret_from_fork+0x14/0x24)
[    8.222995] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[    8.347378] usb 1-1.4: New USB device found, idVendor=8644, idProduct=8005
[    8.354305] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[    8.376154] usb 1-1.4: Product: USB Flash Disk
[    8.382022] usb 1-1.4: Manufacturer: General
[    8.406153] usb 1-1.4: SerialNumber: 2E515D00000011D9
[    8.412091] usb-storage 1-1.4:1.0: USB Mass Storage device detected
[    8.436180] scsi host2: usb-storage 1-1.4:1.0
[    9.457339] scsi 2:0:0:0: Direct-Access     General  USB Flash Disk   1.00 PQ: 0 ANSI: 2
[    9.477695] sd 2:0:0:0: [sdc] 31299584 512-byte logical blocks: (16.0 GB/14.9 GiB)
[    9.496191] sd 2:0:0:0: [sdc] Write Protect is off
[    9.501031] sd 2:0:0:0: [sdc] Mode Sense: 03 00 00 00
[    9.516534] sd 2:0:0:0: [sdc] No Caching mode page found
[    9.521875] sd 2:0:0:0: [sdc] Assuming drive cache: write through
[    9.550659]  sdc: sdc1
[    9.556413] sd 2:0:0:0: [sdc] Attached SCSI removable disk
[  102.316188] random: crng init done

[    8.029417] VFS: Cannot open root device "(null)" or unknown-block(0,0): error -6
[    8.037037] Please append a correct "root=" boot option; here are the available partitions:

I understand it so that the kernel doesn't get the root parameter in commandline
thats my env

NSA320> printenv
arcNumber=3956
baudrate=115200
bootcmd=run bootcmd_uenv; run bootcmd_usb; usb stop; run bootcmd_sata; reset
bootcmd_sata=run sata_init; run set_bootargs_sata; run sata_boot
bootcmd_uenv=run uenv_load; if test $uenv_loaded -eq 1; then run uenv_import; fi
bootcmd_usb=run usb_init; run set_bootargs_usb; run usb_boot
bootdelay=10
console=ttyS0,115200
device=0:1
ethact=egiga0
ethaddr=b6:d0:5e:0f:a1:17
led_error=orange blinking
led_exit=green off
led_init=green blinking
machid=118f
mainlineLinux=yes
mtdids=nand0=orion_nand
mtdparts=mtdparts=orion_nand:0x100000(uboot),0x80000(stock_uboot_env),0x80000(key_store),0x80000(info),0xA00000(etc),0xA00000(kernel_1),0x2FC0000(rootfs1),0xA00000(kernel_2),0x2FC0000(rootfs2)
partition=nand0,2
rootdelay=2
rootfstype=ext2
sata_boot=mw 0x800000 0 1; run sata_load_uimage; if run sata_load_uinitrd; then bootm 0x800000 0x1100000; else bootm 0x800000; fi
sata_init=ide reset
sata_load_uimage=ext2load ide $device 0x800000 /boot/uImage
sata_load_uinitrd=ext2load ide $device 0x1100000 /boot/uInitrd
sata_root=/dev/sda1
set_bootargs_sata=setenv bootargs console=$console root=$sata_root rootdelay=$rootdelay rootfstype=$rootfstype $mtdparts
set_bootargs_usb=setenv bootargs console=$console root=$usb_root rootdelay=$rootdelay rootfstype=$rootfstype $mtdparts
stderr=serial
stdin=serial
stdout=serial
uenv_import=echo importing envs ...; env import -t 0x810000
uenv_load=usb start; setenv uenv_loaded 0; for devtype in usb; do for disknum in 0; do run uenv_read_disk; done; done
uenv_read=echo loading envs from $devtype $disknum ...; if load $devtype $disknum:1 0x810000 /boot/uEnv.txt; then setenv uenv_loaded 1; fi
uenv_read_disk=if $devtype part $disknum; then run uenv_read; fi
usb_boot=run usb_load_dtb; run usb_load_uimage; if run usb_load_uinitrd; then bootm 0x800000 0x1100000 0x1c00000; else bootm 0x800000 - 0x1c00000; fi
usb_init=usb start
usb_load_dtb=ext2load usb $device 0x1c00000 /boot/dts/kirkwood-nsa320.dtb
usb_load_uimage=ext2load usb $device 0x800000 /boot/uImage
usb_load_uinitrd=ext2load usb $device 0x1100000 /boot/uInitrd
usb_root=LABEL=USBROOT

Environment size: 2188/131068 bytes

I edited it a bit so it shows the bootargs before booting the kernel and it seems ok.

NSA320> setenv bootcmd_usb 'run usb_init; run set_bootargs_usb; printenv bootargs;  run usb_boot'
NSA320> saveenv
Saving Environment to NAND...
Erasing NAND...
Erasing at 0xc0000 -- 100% complete.
Writing to NAND... OK
NSA320> boot
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 3 USB Device(s) found
       scanning usb for storage devices... 1 Storage Device(s) found

Partition Map for USB device 0  --   Partition Type: DOS

Part    Start Sector    Num Sectors     UUID            Type
  1     32              31299552        583ec236-01     83
loading envs from usb 0 ...
73 bytes read in 284 ms (0 Bytes/s)
importing envs ...
## Warning: Input data exceeds 1048576 bytes - truncated
## Info: input data size = 1048578 = 0x100002
bootargs=console=ttyS0,115200 root=LABEL=USBROOT rootdelay=2 rootfstype=ext2 mtdparts=orion_nand:0x100000(uboot),0x80000(stock_uboot_env),0x80000(key_store),0x80000(info),0xA00000(etc),0xA00000(kernel_1),0x2FC0000(rootfs1),0xA00000(kernel_2),0x2FC0000(rootfs2)
13691 bytes read in 936 ms (13.7 KiB/s)
3835283 bytes read in 430 ms (8.5 MiB/s)
7245696 bytes read in 558 ms (12.4 MiB/s)
## Booting kernel from Legacy Image at 00800000 ...
   Image Name:   Linux-4.12.1-kirkwood-tld-1
   Created:      2017-08-14   1:30:51 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3835219 Bytes = 3.7 MiB
   Load Address: 00008000
   Entry Point:  00008000
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 01100000 ...
   Image Name:   initramfs-4.12.1-kirkwood-tld-1
....................

and still the same error:
I tried it on ext4 and ext2, usb and sd card, different root parameters root=LABEL=USBROOT , root=LABEL=rootfs (changed label of course), root=/dev/sdb1, sdc1, updated uboof from 15.10 to 16.05, downgraded kernel to 4.10.9, created /boot/uEnv.txt with bootargs and manually set bootargs from commandline before run bootcmd_usb command and always the same error.
One thing which I see now is

73 bytes read in 284 ms (0 Bytes/s)
importing envs ...
## Warning: Input data exceeds 1048576 bytes - truncated
## Info: input data size = 1048578 = 0x100002

but I don't have any Idea where it's from