Ethernet broken in v.1.9

[tsat-psv]

Description

Ethernet will not come back up if taken down grammatically.

How to reproduce:

# ip link set dev eth0 down
# macb e000b000.ethernet eth0: link down
# ip link set dev eth0 up

Expected behavior:

Link comes up (lights on eth port blinks.)

Current behavior:

Interface stays down.

Test setup:

• Enclsutra PM3 Base board
• Zynq Mars ZX3 module
• Standard config from bsp (no additions)
• QSPI Boot

Bootlog:

Bootinq on QSPI Flash ...
SF: Detected s25fl512s_256k with page size 512 Bytes, erase size 256 KiB, total 64 MiB
device 0 offset 0xb80000, size 0x80000
SF: 524288 bytes @ 0xb80000 Read: OK
## Executing script at 01000000
device 0 offset 0x600000, size 0x500000
SF: 5242880 bytes @ 0x600000 Read: OK
device 0 offset 0xb00000, size 0x80000
SF: 524288 bytes @ 0xb00000 Read: OK
## Booting kernel from Legacy Image at 06000000 ...
   Image Name:   Linux-5.4.0-xilinx-g4fabb195a
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    3477600 Bytes = 3.3 MiB
   Load Address: 00008000
   Entry Point:  00008000
   Verifying Checksum ... OK
## Flattened Device Tree blob at 06600000
   Booting using the fdt blob at 0x6600000
   Loading Kernel Image ... OK
   Loading Device Tree to 1ea86000, end 1ea8c692 ... OK

Starting kernel ...

Booting Linux on physical CPU 0x0
Linux version 5.4.0-xilinx-g4fabb195a (peter@peter-ubuntu) (gcc version 7.2.0 (GCC)) #1 SMP PREEMPT Fri Aug 20 10:49:57 CEST 2021
CPU: ARMv7 Processor [413fc090] revision 0 (ARMv7), cr=18c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
OF: fdt: Machine model: Enclustra ZX3-20-1C-D9 SOM
Memory policy: Data cache writealloc
cma: Reserved 16 MiB at 0x1f000000
percpu: Embedded 15 pages/cpu s31564 r8192 d21684 u61440
Built 1 zonelists, mobility grouping on.  Total pages: 130048
Kernel command line: console=ttyPS0,115200 rw earlyprintk root=/dev/mtdblock5 rootfstype=jffs2 rootwait
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes, linear)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes, linear)
mem auto-init: stack:off, heap alloc:off, heap free:off
Memory: 494188K/524288K available (5120K kernel code, 172K rwdata, 1336K rodata, 1024K init, 121K bss, 13716K reserved, 16384K cma-reserved, 0K highmem)
rcu: Preemptible hierarchical RCU implementation.
rcu:    RCU restricting CPUs from NR_CPUS=4 to nr_cpu_ids=2.
        Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
efuse mapped to (ptrval)
slcr mapped to (ptrval)
L2C: platform modifies aux control register: 0x72360000 -> 0x72760000
L2C: DT/platform modifies aux control register: 0x72360000 -> 0x72760000
L2C-310 erratum 769419 enabled
L2C-310 enabling early BRESP for Cortex-A9
L2C-310 full line of zeros enabled for Cortex-A9
L2C-310 ID prefetch enabled, offset 1 lines
L2C-310 dynamic clock gating enabled, standby mode enabled
L2C-310 cache controller enabled, 8 ways, 512 kB
L2C-310: CACHE_ID 0x410000c8, AUX_CTRL 0x76760001
random: get_random_bytes called from start_kernel+0x25c/0x410 with crng_init=0
zynq_clock_init: clkc starts at (ptrval)
Zynq clock init
ps_clk frequency not specified, using 33 MHz.
sched_clock: 64 bits at 333MHz, resolution 3ns, wraps every 4398046511103ns
clocksource: arm_global_timer: mask: 0xffffffffffffffff max_cycles: 0x4ce07af025, max_idle_ns: 440795209040 ns
Switching to timer-based delay loop, resolution 3ns
Console: colour dummy device 80x30
Calibrating delay loop (skipped), value calculated using timer frequency.. 666.66 BogoMIPS (lpj=3333333)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
CPU: Testing write buffer coherency: ok
CPU0: Spectre v2: using BPIALL workaround
CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x100000 - 0x100060
rcu: Hierarchical SRCU implementation.
smp: Bringing up secondary CPUs ...
CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
CPU1: Spectre v2: using BPIALL workaround
smp: Brought up 1 node, 2 CPUs
SMP: Total of 2 processors activated (1333.33 BogoMIPS).
CPU: All CPU(s) started in SVC mode.
devtmpfs: initialized
VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
futex hash table entries: 512 (order: 3, 32768 bytes, linear)
pinctrl core: initialized pinctrl subsystem
NET: Registered protocol family 16
DMA: preallocated 256 KiB pool for atomic coherent allocations
cpuidle: using governor menu
hw-breakpoint: found 5 (+1 reserved) breakpoint and 1 watchpoint registers.
hw-breakpoint: maximum watchpoint size is 4 bytes.
zynq-ocm f800c000.ocmc: ZYNQ OCM pool: 256 KiB @ 0x(ptrval)
e0000000.serial: ttyPS0 at MMIO 0xe0000000 (irq = 25, base_baud = 6249999) is a xuartps
printk: console [ttyPS0] enabled
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
pps_core: LinuxPPS API ver. 1 registered
pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
PTP clock support registered
EDAC MC: Ver: 3.0.0
FPGA manager framework
clocksource: Switched to clocksource arm_global_timer
thermal_sys: Registered thermal governor 'step_wise'
NET: Registered protocol family 2
tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
TCP established hash table entries: 4096 (order: 2, 16384 bytes, linear)
TCP bind hash table entries: 4096 (order: 3, 32768 bytes, linear)
TCP: Hash tables configured (established 4096 bind 4096)
UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
NET: Registered protocol family 1
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
hw perfevents: no interrupt-affinity property for /pmu@f8891000, guessing.
hw perfevents: enabled with armv7_cortex_a9 PMU driver, 7 counters available
workingset: timestamp_bits=30 max_order=17 bucket_order=0
jffs2: version 2.2. (NAND) (SUMMARY)  �© 2001-2006 Red Hat, Inc.
io scheduler mq-deadline registered
io scheduler kyber registered
zynq-pinctrl 700.pinctrl: zynq pinctrl initialized
GPIO IRQ not connected
XGpio: gpio@41200000: registered, base is 1020
brd: module loaded
loop: module loaded
random: fast init done
random: crng init done
spi-nor spi0.0: s25fl512s (65536 Kbytes)
6 fixed-partitions partitions found on MTD device spi0.0
Creating 6 MTD partitions on "spi0.0":
0x000000000000-0x000000600000 : "qspi-bootimage"
0x000000600000-0x000000b00000 : "qspi-kernel"
0x000000b00000-0x000000b80000 : "qspi-device-tree"
0x000003f80000-0x000004000000 : "qspi-bootargs"
0x000000b80000-0x000000c00000 : "qspi-bootscript"
0x000000c00000-0x000003f80000 : "qspi-rootfs"
libphy: Fixed MDIO Bus: probed
CAN device driver interface
libphy: MACB_mii_bus: probed
Micrel KSZ9031 Gigabit PHY e000b000.ethernet-ffffffff:03: attached PHY driver [Micrel KSZ9031 Gigabit PHY] (mii_bus:phy_addr=e000b000.ethernet-ffffffff:03, irq
=POLL)
macb e000b000.ethernet eth0: Cadence GEM rev 0x00020118 at 0xe000b000 irq 28 (20:b0:f7:03:f4:58)
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
usbcore: registered new interface driver usb-storage
ci_hdrc ci_hdrc.0: unable to init phy: -110
ci_hdrc: probe of ci_hdrc.0 failed with error -110
i2c /dev entries driver
rtc-isl12022 0-006f: registered as rtc0
cdns-i2c e0004000.i2c: 100 kHz mmio e0004000 irq 22
cdns-wdt f8005000.watchdog: Xilinx Watchdog Timer with timeout 10s
EDAC MC: ECC not enabled
Xilinx Zynq CpuIdle Driver started
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pltfm: SDHCI platform and OF driver helper
mmc0: SDHCI controller on e0100000.mmc [e0100000.mmc] using ADMA
ledtrig-cpu: registered to indicate activity on CPUs
clocksource: ttc_clocksource: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 537538477 ns
timer #0 at a462a2af, irq=41
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
pl353_wait_for_dev_ready timed out
nand: No NAND device found
pl353-nand e1000000.flash: could not scan the nand chip
pl353-nand: probe of e1000000.flash failed with error -110
fpga_manager fpga0: Xilinx Zynq FPGA Manager registered
NET: Registered protocol family 10
Segment Routing with IPv6
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
NET: Registered protocol family 17
can: controller area network core (rev 20170425 abi 9)
NET: Registered protocol family 29
can: raw protocol (rev 20170425)
can: broadcast manager protocol (rev 20170425 t)
can: netlink gateway (rev 20190810) max_hops=1
Registering SWP/SWPB emulation handler
of-fpga-region fpga-full: FPGA Region probed
rtc-isl12022 0-006f: setting system clock to 2000-01-01T00:00:00 UTC (946684800)
of_cfs_init
of_cfs_init: OK
VFS: Mounted root (jffs2 filesystem) on device 31:5.
devtmpfs: mounted
Freeing unused kernel memory: 1024K
Run /sbin/init as init process
Starting syslogd: OK
Starting klogd: OK
Running sysctl: OK
Saving random seed: OK
Starting network: OK
Starting dhcpcd...
8021q: 802.1Q VLAN Support v1.8
no interfaces have a carrier
forked to background, child pid 96
macb e000b000.ethernet eth0: link up (1000/Full)
IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
ssh-keygen: generating new host keys: RSA DSA ECDSA ED25519 
Starting sshd: OK