Hi,

On today's next, the bisect pointed commit
ff33d1030a6ca87cea9a41e1a2ea7750a781ab3d as fault for my boot failures
with NFSv4 root on Toradex Colibri VF50 (Iris carrier board).

Author: Robin Murphy <robin.mur...@arm.com>
Date:   Mon Jul 23 23:16:12 2018 +0100
    OF: Don't set default coherent DMA mask

Board: Toradex Colibri VF50 (NXP VF500, Cortex A5, serial configured
with DMA) on Iris Carrier.

It looks like problem with Freescale Ethernet driver:
[   15.458477] fsl-edma 40018000.dma-controller: coherent DMA mask is unset
[   15.465284] fsl-lpuart 40027000.serial: Cannot prepare cyclic DMA
[   15.472086] Root-NFS: no NFS server address
[   15.476359] VFS: Unable to mount root fs via NFS, trying floppy.
[   15.484228] VFS: Cannot open root device "nfs" or
unknown-block(2,0): error -6
[   15.491664] Please append a correct "root=" boot option; here are
the available partitions:
[   15.500188] 0100           16384 ram0
[   15.500200]  (driver?)
[   15.506406] Kernel panic - not syncing: VFS: Unable to mount root
fs on unknown-block(2,0)
[   15.514747] ---[ end Kernel panic - not syncing: VFS: Unable to
mount root fs on unknown-block(2,0) ]---

Attached - defconfig and full boot log.

Any hints?
Let me know if you need any more information.

Best regards,
Krzysztof
[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.18.0-rc6-00011-g12be1e1a09c8 (krzk@PC-kkoz) (gcc 
version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)) #394 Fri Jul 27 
15:01:34 CEST 2018
[    0.000000] CPU: ARMv7 Processor [410fc051] revision 1 (ARMv7), cr=10c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing 
instruction cache
[    0.000000] OF: fdt: Machine model: Toradex Colibri VF50 on Colibri 
Evaluation Board
[    0.000000] Memory policy: Data cache writeback
[    0.000000] cma: Reserved 16 MiB at 0x87000000
[    0.000000] CPU: All CPU(s) started in SVC mode.
[    0.000000] random: get_random_bytes called from start_kernel+0xa0/0x3fc 
with crng_init=0
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 32512
[    0.000000] Kernel command line: ip=:::::eth0: root=/dev/nfs console=tty1 
console=ttyLP0,115200n8 consoleblank=0
[    0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes)
[    0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[    0.000000] Memory: 103836K/131072K available (6144K kernel code, 193K 
rwdata, 1600K rodata, 1024K init, 142K bss, 10852K reserved, 16384K 
cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
[    0.000000]     fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
[    0.000000]     vmalloc : 0x88800000 - 0xff800000   (1904 MB)
[    0.000000]     lowmem  : 0x80000000 - 0x88000000   ( 128 MB)
[    0.000000]     modules : 0x7f000000 - 0x80000000   (  16 MB)
[    0.000000]       .text : 0x(ptrval) - 0x(ptrval)   (7136 kB)
[    0.000000]       .init : 0x(ptrval) - 0x(ptrval)   (1024 kB)
[    0.000000]       .data : 0x(ptrval) - 0x(ptrval)   ( 194 kB)
[    0.000000]        .bss : 0x(ptrval) - 0x(ptrval)   ( 143 kB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000058] sched_clock: 64 bits at 132MHz, resolution 7ns, wraps every 
2199023255551ns
[    0.000131] clocksource: arm_global_timer: mask: 0xffffffffffffffff 
max_cycles: 0x1e7178659b, max_idle_ns: 440795204301 ns
[    0.000221] Switching to timer-based delay loop, resolution 7ns
[    0.001479] Console: colour dummy device 80x30
[    0.002469] console [tty1] enabled
[    0.002562] Calibrating delay loop (skipped), value calculated using timer 
frequency.. 264.00 BogoMIPS (lpj=1320000)
[    0.002661] pid_max: default: 32768 minimum: 301
[    0.003168] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.003281] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[    0.005152] CPU: Testing write buffer coherency: ok
[    0.007574] Setting up static identity map for 0x80100000 - 0x80100060
[    0.010395] devtmpfs: initialized
[    0.026025] VFP support v0.3: implementor 41 architecture 2 part 30 variant 
5 rev 1
[    0.026971] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, 
max_idle_ns: 19112604462750000 ns
[    0.027109] futex hash table entries: 256 (order: -1, 3072 bytes)
[    0.029626] pinctrl core: initialized pinctrl subsystem
[    0.033125] NET: Registered protocol family 16
[    0.037527] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.041234] cpuidle: using governor menu
[    0.041656] hw-breakpoint: found 2 (+1 reserved) breakpoint and 1 watchpoint 
registers.
[    0.041749] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.053893] vf610-pinctrl 40048000.iomuxc: DMA mask not set
[    0.054590] vf610-pinctrl 40048000.iomuxc: initialized IMX pinctrl driver
[    0.060556] mxs_phy 40050800.usbphy: DMA mask not set
[    0.062169] mxs_phy 40050c00.usbphy: DMA mask not set
[    0.099947] fsl-edma 40018000.dma-controller: DMA mask not set
[    0.110747] fsl-edma 40098000.dma-controller: DMA mask not set
[    0.122064] reg-fixed-voltage regulator-module-3v3: DMA mask not set
[    0.123095] reg-fixed-voltage regulator-module-3v3-avdd: DMA mask not set
[    0.124035] reg-fixed-voltage regulator-3v3: DMA mask not set
[    0.124997] reg-fixed-voltage regulator-5v0: DMA mask not set
[    0.125797] +V3.3: supplied by 3.3V
[    0.126371] reg-fixed-voltage regulator-usbh-vbus: DMA mask not set
[    0.128294] SCSI subsystem initialized
[    0.129228] usbcore: registered new interface driver usbfs
[    0.129554] usbcore: registered new interface driver hub
[    0.129967] usbcore: registered new device driver usb
[    0.131324] imx-i2c 40066000.i2c: DMA mask not set
[    0.132928] i2c i2c-0: IMX I2C adapter registered
[    0.133169] i2c i2c-0: using dma0chan0 (tx) and dma0chan1 (rx) for DMA 
transfers
[    0.133913] pps_core: LinuxPPS API ver. 1 registered
[    0.133999] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo 
Giometti <giome...@linux.it>
[    0.134173] PTP clock support registered
[    0.138225] clocksource: Switched to clocksource arm_global_timer
[    0.179588] NET: Registered protocol family 2
[    0.181405] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 
bytes)
[    0.181577] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[    0.181674] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[    0.181754] TCP: Hash tables configured (established 1024 bind 1024)
[    0.182243] UDP hash table entries: 256 (order: 0, 4096 bytes)
[    0.182365] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[    0.182976] NET: Registered protocol family 1
[    0.184778] RPC: Registered named UNIX socket transport module.
[    0.184878] RPC: Registered udp transport module.
[    0.184927] RPC: Registered tcp transport module.
[    0.184970] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.186742] armv7-pmu 40089000.pmu: DMA mask not set
[    0.187330] hw perfevents: enabled with armv7_cortex_a5 PMU driver, 3 
counters available
[    0.191561] Initialise system trusted keyrings
[    0.192178] workingset: timestamp_bits=30 max_order=15 bucket_order=0
[    0.212366] NFS: Registering the id_resolver key type
[    0.212528] Key type id_resolver registered
[    0.212591] Key type id_legacy registered
[    0.212766] ntfs: driver 2.1.32 [Flags: R/W].
[    0.214603] fuse init (API version 7.27)
[    0.228438] Key type asymmetric registered
[    0.228543] Asymmetric key parser 'x509' registered
[    0.228657] io scheduler noop registered
[    0.229244] io scheduler cfq registered (default)
[    0.229326] io scheduler mq-deadline registered
[    0.229380] io scheduler kyber registered
[    0.230875] gpio-vf610 40049000.gpio: DMA mask not set
[    0.232843] gpio-vf610 4004a000.gpio: DMA mask not set
[    0.234518] gpio-vf610 4004b000.gpio: DMA mask not set
[    0.236214] gpio-vf610 4004c000.gpio: DMA mask not set
[    0.237851] gpio-vf610 4004d000.gpio: DMA mask not set
[    0.240304] fsl-ftm-pwm 40038000.pwm: DMA mask not set
[    0.241481] fsl-ftm-pwm 40039000.pwm: DMA mask not set
[    0.245075] fsl-lpuart 40027000.serial: DMA mask not set
[    0.245618] 40027000.serial: ttyLP0 at MMIO 0x40027000 (irq = 19, base_baud 
= 4125000) is a FSL_LPUART
[    0.880945] console [ttyLP0] enabled
[    0.886031] fsl-lpuart 40028000.serial: DMA mask not set
[    0.891991] 40028000.serial: ttyLP1 at MMIO 0x40028000 (irq = 20, base_baud 
= 4125000) is a FSL_LPUART
[    0.903108] fsl-lpuart 40029000.serial: DMA mask not set
[    0.909073] 40029000.serial: ttyLP2 at MMIO 0x40029000 (irq = 21, base_baud 
= 4125000) is a FSL_LPUART
[    0.924431] brd: module loaded
[    0.952401] loop: module loaded
[    0.958600] vf610_nfc 400e0000.nand: DMA mask not set
[    0.964603] nand: device found, Manufacturer ID: 0xc2, Chip ID: 0xf1
[    0.971158] nand: Macronix NAND 128MiB 3,3V 8-bit
[    0.975929] nand: 128 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB 
size: 64
[    0.984095] Bad block table found at page 65472, version 0x01
[    0.990259] Bad block table found at page 65408, version 0x01
[    0.996309] nand_read_bbt: bad block at 0x0000013c0000
[    1.001801] 6 fixed-partitions partitions found on MTD device vf610_nfc
[    1.008577] Creating 6 MTD partitions on "vf610_nfc":
[    1.013711] 0x000000000000-0x000000020000 : "vf-bcb"
[    1.020310] 0x000000020000-0x000000180000 : "u-boot"
[    1.026742] 0x000000180000-0x0000001c0000 : "u-boot-env"
[    1.033681] 0x0000001c0000-0x000004080000 : "ubi1"
[    1.040989] 0x000004080000-0x000007f40000 : "ubi2"
[    1.048086] 0x000007f40000-0x000007f80000 : "reserved"
[    1.055900] fsl-dspi 4002d000.dspi1: DMA mask not set
[    1.061773] ------------[ cut here ]------------
[    1.066519] WARNING: CPU: 0 PID: 1 at ../include/linux/dma-mapping.h:516 
dspi_probe+0x888/0x8e8
[    1.075391] Modules linked in:
[    1.078604] CPU: 0 PID: 1 Comm: swapper Not tainted 
4.18.0-rc6-00011-g12be1e1a09c8 #394
[    1.086672] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[    1.093219] Backtrace:
[    1.095762] [<8010c580>] (dump_backtrace) from [<8010c848>] 
(show_stack+0x18/0x1c)
[    1.103484]  r7:00000009 r6:00000000 r5:80808bfc r4:00000000
[    1.109300] [<8010c830>] (show_stack) from [<8062f28c>] 
(dump_stack+0x24/0x28)
[    1.116620] [<8062f268>] (dump_stack) from [<8011bf50>] (__warn+0x100/0x118)
[    1.123817] [<8011be50>] (__warn) from [<8011c088>] 
(warn_slowpath_null+0x48/0x50)
[    1.131551]  r8:868b4a10 r7:86ba8af8 r6:80494cf0 r5:00000204 r4:80808bfc
[    1.138399] [<8011c040>] (warn_slowpath_null) from [<80494cf0>] 
(dspi_probe+0x888/0x8e8)
[    1.146571]  r6:868b4a00 r5:80a03048 r4:86ba8800
[    1.151329] [<80494468>] (dspi_probe) from [<8042ccf8>] 
(platform_drv_probe+0x74/0xac)
[    1.159408]  r10:00000000 r9:00000000 r8:80a229a4 r7:80a4d5f0 r6:80a229a4 
r5:868b4a10
[    1.167310]  r4:00000000
[    1.169990] [<8042cc84>] (platform_drv_probe) from [<8042b064>] 
(driver_probe_device+0x2bc/0x334)
[    1.179021]  r7:80a4d5f0 r6:00000000 r5:80a4d5ec r4:868b4a10
[    1.184764] [<8042ada8>] (driver_probe_device) from [<8042b1c0>] 
(__driver_attach+0xe4/0xe8)
[    1.193353]  r10:8092b838 r9:80a03048 r8:00000000 r7:80a03048 r6:868b4a44 
r5:80a229a4
[    1.201326]  r4:868b4a10 r3:00000000
[    1.204981] [<8042b0dc>] (__driver_attach) from [<804290f8>] 
(bus_for_each_dev+0x70/0xbc)
[    1.213306]  r7:80a03048 r6:8042b0dc r5:80a229a4 r4:00000000
[    1.219114] [<80429088>] (bus_for_each_dev) from [<8042a93c>] 
(driver_attach+0x24/0x28)
[    1.227199]  r7:00000000 r6:80a1e5d8 r5:86b9f600 r4:80a229a4
[    1.233002] [<8042a918>] (driver_attach) from [<8042a3b8>] 
(bus_add_driver+0x1a0/0x218)
[    1.241175] [<8042a218>] (bus_add_driver) from [<8042bb9c>] 
(driver_register+0x80/0x118)
[    1.249418]  r7:8091e158 r6:ffffe000 r5:80934e7c r4:80a229a4
[    1.255157] [<8042bb1c>] (driver_register) from [<8042cc38>] 
(__platform_driver_register+0x48/0x50)
[    1.264341]  r5:80934e7c r4:80a30440
[    1.268005] [<8042cbf0>] (__platform_driver_register) from [<8091e174>] 
(fsl_dspi_driver_init+0x1c/0x20)
[    1.277655] [<8091e158>] (fsl_dspi_driver_init) from [<80102630>] 
(do_one_initcall+0x5c/0x1a4)
[    1.286455] [<801025d4>] (do_one_initcall) from [<80900f18>] 
(kernel_init_freeable+0x148/0x1e4)
[    1.295318]  r9:00000007 r8:80a30440 r7:8092b830 r6:80a30440 r5:80934e7c 
r4:8088ede8
[    1.303234] [<80900dd0>] (kernel_init_freeable) from [<80643f90>] 
(kernel_init+0x10/0x118)
[    1.311662]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 
r5:80643f80
[    1.319624]  r4:00000000
[    1.322233] [<80643f80>] (kernel_init) from [<801010e8>] 
(ret_from_fork+0x14/0x2c)
[    1.329938] Exception stack(0x86843fb0 to 0x86843ff8)
[    1.335054] 3fa0:                                     00000000 00000000 
00000000 00000000
[    1.343378] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 
00000000 00000000
[    1.351699] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    1.358447]  r5:80643f80 r4:00000000
[    1.362091] ---[ end trace 14801d0875acd9ff ]---
[    1.366776] fsl-dspi 4002d000.dspi1: coherent DMA mask is unset
[    1.372904] fsl-dspi 4002d000.dspi1: can't get dma channels
[    1.378837] fsl-dspi: probe of 4002d000.dspi1 failed with error -12
[    1.386400] libphy: Fixed MDIO Bus: probed
[    1.393539] fec 400d1000.ethernet: DMA mask not set
[    1.399380] ------------[ cut here ]------------
[    1.404130] WARNING: CPU: 0 PID: 1 at ../include/linux/dma-mapping.h:516 
fec_probe+0x10ec/0x14d4
[    1.413096] Modules linked in:
[    1.416241] CPU: 0 PID: 1 Comm: swapper Tainted: G        W         
4.18.0-rc6-00011-g12be1e1a09c8 #394
[    1.425771] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[    1.432326] Backtrace:
[    1.434871] [<8010c580>] (dump_backtrace) from [<8010c848>] 
(show_stack+0x18/0x1c)
[    1.442588]  r7:00000009 r6:00000000 r5:80808bfc r4:00000000
[    1.448412] [<8010c830>] (show_stack) from [<8062f28c>] 
(dump_stack+0x24/0x28)
[    1.455730] [<8062f268>] (dump_stack) from [<8011bf50>] (__warn+0x100/0x118)
[    1.462928] [<8011be50>] (__warn) from [<8011c088>] 
(warn_slowpath_null+0x48/0x50)
[    1.470659]  r8:00000000 r7:86983000 r6:804a6000 r5:00000204 r4:80808bfc
[    1.477445] [<8011c040>] (warn_slowpath_null) from [<804a6000>] 
(fec_probe+0x10ec/0x14d4)
[    1.485761]  r6:807013d8 r5:86983028 r4:86832000
[    1.490538] [<804a4f14>] (fec_probe) from [<8042ccf8>] 
(platform_drv_probe+0x74/0xac)
[    1.498535]  r10:00000000 r9:00000000 r8:80a23bb4 r7:80a4d5f0 r6:80a23bb4 
r5:868d0c10
[    1.506438]  r4:00000000
[    1.509116] [<8042cc84>] (platform_drv_probe) from [<8042b064>] 
(driver_probe_device+0x2bc/0x334)
[    1.518068]  r7:80a4d5f0 r6:00000000 r5:80a4d5ec r4:868d0c10
[    1.523871] [<8042ada8>] (driver_probe_device) from [<8042b1c0>] 
(__driver_attach+0xe4/0xe8)
[    1.532469]  r10:8092b838 r9:80a03048 r8:00000000 r7:80a03048 r6:868d0c44 
r5:80a23bb4
[    1.540445]  r4:868d0c10 r3:00000000
[    1.544098] [<8042b0dc>] (__driver_attach) from [<804290f8>] 
(bus_for_each_dev+0x70/0xbc)
[    1.552418]  r7:80a03048 r6:8042b0dc r5:80a23bb4 r4:00000000
[    1.558156] [<80429088>] (bus_for_each_dev) from [<8042a93c>] 
(driver_attach+0x24/0x28)
[    1.566303]  r7:00000000 r6:80a1e5d8 r5:86b9ff80 r4:80a23bb4
[    1.572114] [<8042a918>] (driver_attach) from [<8042a3b8>] 
(bus_add_driver+0x1a0/0x218)
[    1.580289] [<8042a218>] (bus_add_driver) from [<8042bb9c>] 
(driver_register+0x80/0x118)
[    1.588529]  r7:8091e514 r6:ffffe000 r5:80934e90 r4:80a23bb4
[    1.594271] [<8042bb1c>] (driver_register) from [<8042cc38>] 
(__platform_driver_register+0x48/0x50)
[    1.603458]  r5:80934e90 r4:80a30440
[    1.607118] [<8042cbf0>] (__platform_driver_register) from [<8091e530>] 
(fec_driver_init+0x1c/0x20)
[    1.616344] [<8091e514>] (fec_driver_init) from [<80102630>] 
(do_one_initcall+0x5c/0x1a4)
[    1.624703] [<801025d4>] (do_one_initcall) from [<80900f18>] 
(kernel_init_freeable+0x148/0x1e4)
[    1.633570]  r9:00000007 r8:80a30440 r7:8092b830 r6:80a30440 r5:80934e90 
r4:8088ede8
[    1.641487] [<80900dd0>] (kernel_init_freeable) from [<80643f90>] 
(kernel_init+0x10/0x118)
[    1.649915]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 
r5:80643f80
[    1.657809]  r4:00000000
[    1.660472] [<80643f80>] (kernel_init) from [<801010e8>] 
(ret_from_fork+0x14/0x2c)
[    1.668111] Exception stack(0x86843fb0 to 0x86843ff8)
[    1.673291] 3fa0:                                     00000000 00000000 
00000000 00000000
[    1.681623] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 
00000000 00000000
[    1.689951] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    1.696628]  r5:80643f80 r4:00000000
[    1.700309] ---[ end trace 14801d0875acda00 ]---
[    1.705007] fec 400d1000.ethernet: coherent DMA mask is unset
[    1.710888] ------------[ cut here ]------------
[    1.715590] WARNING: CPU: 0 PID: 1 at ../include/linux/dma-mapping.h:516 
dmam_alloc_coherent+0x140/0x160
[    1.725197] Modules linked in:
[    1.728401] CPU: 0 PID: 1 Comm: swapper Tainted: G        W         
4.18.0-rc6-00011-g12be1e1a09c8 #394
[    1.737868] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[    1.744416] Backtrace:
[    1.746951] [<8010c580>] (dump_backtrace) from [<8010c848>] 
(show_stack+0x18/0x1c)
[    1.754663]  r7:00000009 r6:00000000 r5:80808bfc r4:00000000
[    1.760484] [<8010c830>] (show_stack) from [<8062f28c>] 
(dump_stack+0x24/0x28)
[    1.767799] [<8062f268>] (dump_stack) from [<8011bf50>] (__warn+0x100/0x118)
[    1.774990] [<8011be50>] (__warn) from [<8011c088>] 
(warn_slowpath_null+0x48/0x50)
[    1.782713]  r8:00001000 r7:807013d8 r6:801563a0 r5:00000204 r4:80808bfc
[    1.789566] [<8011c040>] (warn_slowpath_null) from [<801563a0>] 
(dmam_alloc_coherent+0x140/0x160)
[    1.798592]  r6:86b96b10 r5:80a03048 r4:868d0c10
[    1.803289] [<80156260>] (dmam_alloc_coherent) from [<804a5a38>] 
(fec_probe+0xb24/0x14d4)
[    1.811619]  r10:86eef3e8 r9:868d0c00 r8:80a4e574 r7:80a03048 r6:00001000 
r5:868d0c10
[    1.819588]  r4:86832000
[    1.822211] [<804a4f14>] (fec_probe) from [<8042ccf8>] 
(platform_drv_probe+0x74/0xac)
[    1.830188]  r10:00000000 r9:00000000 r8:80a23bb4 r7:80a4d5f0 r6:80a23bb4 
r5:868d0c10
[    1.838088]  r4:00000000
[    1.840757] [<8042cc84>] (platform_drv_probe) from [<8042b064>] 
(driver_probe_device+0x2bc/0x334)
[    1.849785]  r7:80a4d5f0 r6:00000000 r5:80a4d5ec r4:868d0c10
[    1.855528] [<8042ada8>] (driver_probe_device) from [<8042b1c0>] 
(__driver_attach+0xe4/0xe8)
[    1.864116]  r10:8092b838 r9:80a03048 r8:00000000 r7:80a03048 r6:868d0c44 
r5:80a23bb4
[    1.872088]  r4:868d0c10 r3:00000000
[    1.875742] [<8042b0dc>] (__driver_attach) from [<804290f8>] 
(bus_for_each_dev+0x70/0xbc)
[    1.884059]  r7:80a03048 r6:8042b0dc r5:80a23bb4 r4:00000000
[    1.889864] [<80429088>] (bus_for_each_dev) from [<8042a93c>] 
(driver_attach+0x24/0x28)
[    1.897954]  r7:00000000 r6:80a1e5d8 r5:86b9ff80 r4:80a23bb4
[    1.903752] [<8042a918>] (driver_attach) from [<8042a3b8>] 
(bus_add_driver+0x1a0/0x218)
[    1.911930] [<8042a218>] (bus_add_driver) from [<8042bb9c>] 
(driver_register+0x80/0x118)
[    1.920172]  r7:8091e514 r6:ffffe000 r5:80934e90 r4:80a23bb4
[    1.925910] [<8042bb1c>] (driver_register) from [<8042cc38>] 
(__platform_driver_register+0x48/0x50)
[    1.935095]  r5:80934e90 r4:80a30440
[    1.938829] [<8042cbf0>] (__platform_driver_register) from [<8091e530>] 
(fec_driver_init+0x1c/0x20)
[    1.947981] [<8091e514>] (fec_driver_init) from [<80102630>] 
(do_one_initcall+0x5c/0x1a4)
[    1.956325] [<801025d4>] (do_one_initcall) from [<80900f18>] 
(kernel_init_freeable+0x148/0x1e4)
[    1.965188]  r9:00000007 r8:80a30440 r7:8092b830 r6:80a30440 r5:80934e90 
r4:8088ede8
[    1.973100] [<80900dd0>] (kernel_init_freeable) from [<80643f90>] 
(kernel_init+0x10/0x118)
[    1.981522]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 
r5:80643f80
[    1.989488]  r4:00000000
[    1.992091] [<80643f80>] (kernel_init) from [<801010e8>] 
(ret_from_fork+0x14/0x2c)
[    1.999794] Exception stack(0x86843fb0 to 0x86843ff8)
[    2.004905] 3fa0:                                     00000000 00000000 
00000000 00000000
[    2.013226] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 
00000000 00000000
[    2.021557] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    2.028298]  r5:80643f80 r4:00000000
[    2.031921] ---[ end trace 14801d0875acda01 ]---
[    2.036594] fec 400d1000.ethernet: coherent DMA mask is unset
[    2.042838] fec: probe of 400d1000.ethernet failed with error -12
[    2.049422] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    2.056777] usbcore: registered new interface driver usb-storage
[    2.063449] usbcore: registered new interface driver usbserial_generic
[    2.070346] usbserial: USB Serial support registered for generic
[    2.076580] usbcore: registered new interface driver ftdi_sio
[    2.082664] usbserial: USB Serial support registered for FTDI USB Serial 
Device
[    2.090332] usbcore: registered new interface driver pl2303
[    2.096124] usbserial: USB Serial support registered for pl2303
[    2.104021] usbmisc_imx 40034800.usb: DMA mask not set
[    2.109963] usbmisc_imx 400b4800.usb: DMA mask not set
[    2.116227] imx_usb 40034000.usb: DMA mask not set
[    2.125897] ------------[ cut here ]------------
[    2.130757] WARNING: CPU: 0 PID: 1 at ../include/linux/dma-mapping.h:516 
dma_pool_alloc+0x260/0x268
[    2.139958] Modules linked in:
[    2.143098] CPU: 0 PID: 1 Comm: swapper Tainted: G        W         
4.18.0-rc6-00011-g12be1e1a09c8 #394
[    2.152627] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
[    2.159183] Backtrace:
[    2.161722] [<8010c580>] (dump_backtrace) from [<8010c848>] 
(show_stack+0x18/0x1c)
[    2.169446]  r7:00000009 r6:00000000 r5:80808bfc r4:00000000
[    2.175200] [<8010c830>] (show_stack) from [<8062f28c>] 
(dump_stack+0x24/0x28)
[    2.182586] [<8062f268>] (dump_stack) from [<8011bf50>] (__warn+0x100/0x118)
[    2.189783] [<8011be50>] (__warn) from [<8011c088>] 
(warn_slowpath_null+0x48/0x50)
[    2.197434]  r8:868cc210 r7:006080c0 r6:801d7fc0 r5:00000204 r4:80808bfc
[    2.204273] [<8011c040>] (warn_slowpath_null) from [<801d7fc0>] 
(dma_pool_alloc+0x260/0x268)
[    2.212863]  r6:80a03048 r5:86b96ac0 r4:86b96b80
[    2.217567] [<801d7d60>] (dma_pool_alloc) from [<804dda7c>] 
(ci_hdrc_gadget_init+0x2a0/0x3e8)
[    2.226241]  r10:00000064 r9:00000000 r8:86982484 r7:00000000 r6:86982010 
r5:00000000
[    2.234208]  r4:86982010
[    2.236818] [<804dd7dc>] (ci_hdrc_gadget_init) from [<804d9fc4>] 
(ci_hdrc_probe+0x610/0x7f4)
[    2.245411]  r10:00000000 r9:00000000 r8:868c2510 r7:86b9dc10 r6:86b9dc00 
r5:86983010
[    2.253381]  r4:86982010
[    2.255999] [<804d99b4>] (ci_hdrc_probe) from [<8042ccf8>] 
(platform_drv_probe+0x74/0xac)
[    2.264328]  r10:00000000 r9:00000000 r8:80a28120 r7:80a4d5f0 r6:80a28120 
r5:86b9dc10
[    2.272298]  r4:00000000
[    2.274914] [<8042cc84>] (platform_drv_probe) from [<8042b064>] 
(driver_probe_device+0x2bc/0x334)
[    2.283934]  r7:80a4d5f0 r6:00000000 r5:80a4d5ec r4:86b9dc10
[    2.289741] [<8042ada8>] (driver_probe_device) from [<8042b264>] 
(__device_attach_driver+0xa0/0xd4)
[    2.298949]  r10:00000000 r9:80a4d5c8 r8:00000001 r7:8042b1c4 r6:86b9dc10 
r5:86843c04
[    2.306847]  r4:80a28120 r3:00000000
[    2.310559] [<8042b1c4>] (__device_attach_driver) from [<804291e4>] 
(bus_for_each_drv+0x7c/0xc0)
[    2.319500]  r7:8042b1c4 r6:80a03048 r5:86843c04 r4:00000000
[    2.325245] [<80429168>] (bus_for_each_drv) from [<8042ac80>] 
(__device_attach+0xd8/0x140)
[    2.333654]  r7:80a03048 r6:86b9dc44 r5:80a03048 r4:86b9dc10
[    2.339462] [<8042aba8>] (__device_attach) from [<8042b2e4>] 
(device_initial_probe+0x14/0x18)
[    2.348073]  r8:86b9dc10 r7:80a03048 r6:80a1e5d8 r5:86b9dc10 r4:86b9dc18
[    2.354924] [<8042b2d0>] (device_initial_probe) from [<8042a110>] 
(bus_probe_device+0x8c/0x94)
[    2.363700] [<8042a084>] (bus_probe_device) from [<80428124>] 
(device_add+0x39c/0x5bc)
[    2.371771]  r7:80a03048 r6:00000000 r5:868cc210 r4:86b9dc18
[    2.377508] [<80427d88>] (device_add) from [<8042ca14>] 
(platform_device_add+0x110/0x238)
[    2.385838]  r10:86eec848 r9:86b9dc10 r8:80a08a68 r7:80a08a48 r6:86b9dc00 
r5:86b968a0
[    2.393807]  r4:00000002
[    2.396426] [<8042c904>] (platform_device_add) from [<804da568>] 
(ci_hdrc_add_device+0x3c0/0x4a4)
[    2.405451]  r9:86b9dc00 r8:00000002 r7:868ca200 r6:868cc210 r5:00000000 
r4:86843d20
[    2.413364] [<804da1a8>] (ci_hdrc_add_device) from [<804df8c4>] 
(ci_hdrc_imx_probe+0x278/0x384)
[    2.422230]  r10:86eec848 r9:86b96710 r8:86b96710 r7:80a03048 r6:868cc200 
r5:868cc210
[    2.430202]  r4:00000000
[    2.432813] [<804df64c>] (ci_hdrc_imx_probe) from [<8042ccf8>] 
(platform_drv_probe+0x74/0xac)
[    2.441491]  r10:00000000 r9:00000000 r8:80a28400 r7:80a4d5f0 r6:80a28400 
r5:868cc210
[    2.449461]  r4:00000000
[    2.452073] [<8042cc84>] (platform_drv_probe) from [<8042b064>] 
(driver_probe_device+0x2bc/0x334)
[    2.461088]  r7:80a4d5f0 r6:00000000 r5:80a4d5ec r4:868cc210
[    2.466826] [<8042ada8>] (driver_probe_device) from [<8042b1c0>] 
(__driver_attach+0xe4/0xe8)
[    2.475415]  r10:8092b838 r9:80a03048 r8:00000000 r7:80a03048 r6:868cc244 
r5:80a28400
[    2.483390]  r4:868cc210 r3:00000000
[    2.487042] [<8042b0dc>] (__driver_attach) from [<804290f8>] 
(bus_for_each_dev+0x70/0xbc)
[    2.495369]  r7:80a03048 r6:8042b0dc r5:80a28400 r4:00000000
[    2.501175] [<80429088>] (bus_for_each_dev) from [<8042a93c>] 
(driver_attach+0x24/0x28)
[    2.509334]  r7:00000000 r6:80a1e5d8 r5:86b93900 r4:80a28400
[    2.515072] [<8042a918>] (driver_attach) from [<8042a3b8>] 
(bus_add_driver+0x1a0/0x218)
[    2.523234] [<8042a218>] (bus_add_driver) from [<8042bb9c>] 
(driver_register+0x80/0x118)
[    2.531479]  r7:8091eab8 r6:ffffe000 r5:80934ec4 r4:80a28400
[    2.537218] [<8042bb1c>] (driver_register) from [<8042cc38>] 
(__platform_driver_register+0x48/0x50)
[    2.546403]  r5:80934ec4 r4:80a30440
[    2.550131] [<8042cbf0>] (__platform_driver_register) from [<8091ead4>] 
(ci_hdrc_imx_driver_init+0x1c/0x20)
[    2.560058] [<8091eab8>] (ci_hdrc_imx_driver_init) from [<80102630>] 
(do_one_initcall+0x5c/0x1a4)
[    2.569118] [<801025d4>] (do_one_initcall) from [<80900f18>] 
(kernel_init_freeable+0x148/0x1e4)
[    2.577913]  r9:00000007 r8:80a30440 r7:8092b830 r6:80a30440 r5:80934ec4 
r4:8088ede8
[    2.585820] [<80900dd0>] (kernel_init_freeable) from [<80643f90>] 
(kernel_init+0x10/0x118)
[    2.594244]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 
r5:80643f80
[    2.602211]  r4:00000000
[    2.604815] [<80643f80>] (kernel_init) from [<801010e8>] 
(ret_from_fork+0x14/0x2c)
[    2.612518] Exception stack(0x86843fb0 to 0x86843ff8)
[    2.617636] 3fa0:                                     00000000 00000000 
00000000 00000000
[    2.625959] 3fc0: 00000000 00000000 00000000 00000000 00000000 00000000 
00000000 00000000
[    2.634280] 3fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[    2.641027]  r5:80643f80 r4:00000000
[    2.644650] ---[ end trace 14801d0875acda02 ]---
[    2.649399] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.655150] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.660965] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.666703] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.672510] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.678329] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.684066] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.689871] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.695603] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.701405] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.707143] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.712955] imx_usb 40034000.usb: coherent DMA mask is unset
[    2.718898] ci_hdrc: probe of ci_hdrc.0 failed with error -12
[    2.725319] imx_usb 400b4000.usb: DMA mask not set
[    2.732100] snvs_rtc 400a7000.snvs:snvs-rtc-lp: DMA mask not set
[    2.739771] snvs_rtc 400a7000.snvs:snvs-rtc-lp: rtc core: registered 
400a7000.snvs:snvs-rtc-lp as rtc0
[    2.749684] i2c /dev entries driver
[    2.755275] syscon-reboot syscon-reboot: DMA mask not set
[    2.762020] iio_hwmon iio-hwmon: DMA mask not set
[    2.767519] imx2-wdt 4003e000.wdog: DMA mask not set
[    2.774339] imx2-wdt 4003e000.wdog: timeout 60 sec (nowayout=0)
[    2.781955] sdhci: Secure Digital Host Controller Interface driver
[    2.788340] sdhci: Copyright(c) Pierre Ossman
[    2.792760] sdhci-pltfm: SDHCI platform and OF driver helper
[    2.799477] sdhci-esdhc-imx 400b2000.esdhc: DMA mask not set
[    2.805825] sdhci-esdhc-imx 400b2000.esdhc: Got CD GPIO
[    2.840559] mmc0: SDHCI controller on 400b2000.esdhc [400b2000.esdhc] using 
ADMA
[    2.850817] vf610-adc 4003b000.adc: DMA mask not set
[    2.862460] vf610-adc 400bb000.adc: DMA mask not set
[    2.873018] vf610-ocotp 400a5000.ocotp: DMA mask not set
[    2.881315] NET: Registered protocol family 17
[    2.886240] Key type dns_resolver registered
[    2.891125] Registering SWP/SWPB emulation handler
[    2.899162] registered taskstats version 1
[    2.903419] Loading compiled-in X.509 certificates
[    2.913697] VCC_USB[1-4]: supplied by 5V
[    2.924686] ci_hdrc ci_hdrc.1: EHCI Host Controller
[    2.929825] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus number 1
[    2.938318] imx_usb 400b4000.usb: coherent DMA mask is unset
[    2.944130] ci_hdrc ci_hdrc.1: can't setup: -12
[    2.948981] ci_hdrc ci_hdrc.1: USB bus 1 deregistered
[    2.954332] ci_hdrc ci_hdrc.1: can't start host role
[    2.959807] ci_hdrc: probe of ci_hdrc.1 failed with error -12
[    2.969131] snvs_rtc 400a7000.snvs:snvs-rtc-lp: setting system clock to 
1970-01-01 00:00:00 UTC (0)
[   15.448694] +V3.3: disabling
[   15.451677] 5V: disabling
[   15.454342] VCC_USB[1-4]: disabling
[   15.458477] fsl-edma 40018000.dma-controller: coherent DMA mask is unset
[   15.465284] fsl-lpuart 40027000.serial: Cannot prepare cyclic DMA
[   15.472086] Root-NFS: no NFS server address
[   15.476359] VFS: Unable to mount root fs via NFS, trying floppy.
[   15.484228] VFS: Cannot open root device "nfs" or unknown-block(2,0): error 
-6
[   15.491664] Please append a correct "root=" boot option; here are the 
available partitions:
[   15.500188] 0100           16384 ram0
[   15.500200]  (driver?)
[   15.506406] Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(2,0)
[   15.514747] ---[ end Kernel panic - not syncing: VFS: Unable to mount root 
fs on unknown-block(2,0) ]---

Attachment: defconfig
Description: Binary data

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