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FS#1688 - Linksys E3000 is bricked (hangs in early boot) after flashing of 18.06-rc2 #6648

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openwrt-bot opened this issue Jul 24, 2018 · 2 comments
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openwrt-bot commented Jul 24, 2018

mamarley:

When 18.06-rc2 is flashed on a Linksys E3000 and some other BRCM47xx routers (another user reported an Asus RT-N16 (I think) in IRC), the router is bricked immediately and will not boot. I made a custom build off the 18.06 branch with early printk turned on and the following is printed before the router hangs:

Starting program at 0x80001000
[ 0.000000] Linux version 4.14.54 (michael@mamarley-desktop.lan) (gcc version 7.3.0 (OpenWrt GCC 7.3.0 r7161-b84a1c56f3)) #0 Sat Jul 21 18:53:43 2018
[ 0.000000] bootconsole [early0] enabled
[ 0.000000] CPU0 revision is: 00019740 (MIPS 74Kc)
[ 0.000000] bcm47xx: Using bcma bus
[ 0.000000] bcma: bus0: Found chip with id 0x4716, rev 0x01 and package 0x0A
[ 0.000000] Determined physical RAM map:
[ 0.000000] memory: 04000000 @ 00000000 (usable)
[ 0.000000] Initrd not found or empty - disabling initrd
[ 0.000000] Primary instruction cache 32kB, VIPT, 4-way, linesize 32 bytes.
[ 0.000000] Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000000000-0x0000000003ffffff]
[ 0.000000] random: get_random_bytes called from start_kernel+0x80/0x480 with crng_init=0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 16256
[ 0.000000] Kernel command line: noinitrd console=ttyS0,115200
[ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes)
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.000000] Writing ErrCtl register=00000000
[ 0.000000] Readback ErrCtl register=00000000
[ 0.000000] Memory: 59872K/65536K available (3571K kernel code, 150K rwdata, 796K rodata, 208K init, 281K bss, 5664K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 128
[ 0.000000] bcma: bus0: Core 0 found: ChipCommon (manuf 0x4BF, id 0x800, rev 0x1F, class 0x0)
[ 0.000000] bcma: bus0: Core 1 found: IEEE 802.11 (manuf 0x4BF, id 0x812, rev 0x11, class 0x0)
[ 0.000000] bcma: bus0: Core 2 found: GBit MAC (manuf 0x4BF, id 0x82D, rev 0x00, class 0x0)
[ 0.000000] bcma: bus0: Core 3 found: MIPS 74K (manuf 0x4A7, id 0x82C, rev 0x01, class 0x0)
[ 0.000000] bcma: bus0: Core 4 found: USB 2.0 Host (manuf 0x4BF, id 0x819, rev 0x04, class 0x0)
[ 0.000000] bcma: bus0: Core 5 found: PCIe (manuf 0x4BF, id 0x820, rev 0x0E, class 0x0)
[ 0.000000] bcma: bus0: Core 6 found: DDR1/DDR2 Memory Controller (manuf 0x4BF, id 0x82E, rev 0x01, class 0x0)
[ 0.000000] bcma: bus0: Core 7 found: Internal Memory (manuf 0x4BF, id 0x80E, rev 0x07, class 0x0)
[ 0.000000] bcma: bus0: Core 8 found: I2S (manuf 0x4BF, id 0x834, rev 0x00, class 0x0)
[ 0.000000] bcma: bus0: Early bus registered
[ 0.000000] MIPS: machine is Linksys E3000 V1
[ 0.000000] bcm47xx: Setting up vectored interrupts
[ 0.000000] clocksource: MIPS: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7963585194 ns
[ 0.000016] sched_clock: 32 bits at 240MHz, resolution 4ns, wraps every 8947848189ns
[ 0.008683] Calibrating delay loop... 239.61 BogoMIPS (lpj=1198080)
[ 0.085571] pid_max: default: 32768 minimum: 301
[ 0.091091] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.098369] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.109870] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.120799] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.129753] NET: Registered protocol family 16
[ 0.166526] clocksource: Switched to clocksource MIPS
[ 0.174366] NET: Registered protocol family 2
[ 0.180623] TCP established hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.188407] TCP bind hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.195394] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.202728] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.209252] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.216642] NET: Registered protocol family 1

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openwrt-bot commented Jul 26, 2018

rmilecki:

This is a regression caused by
[[https://patchwork.linux-mips.org/patch/19461/|[PATCH v5 1/1] MIPS: BCM47XX: Enable MIPS32 74K Core ExternalSync for BCM47XX PCIe erratum]]

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openwrt-bot commented Jul 27, 2018

rmilecki:

A reverting patch has been sent upstream:
[[https://patchwork.linux-mips.org/patch/20032/|[PATCH] Revert "MIPS: BCM47XX: Enable 74K Core ExternalSync for PCIe
erratum"]]

Pushed to the OpenWrt git repo:

  • [master] 4c1aa64 ("brcm47xx: revert upstream commit breaking BCM4718A1")
  • [openwrt-18.06] 962e86d ("brcm47xx: revert upstream commit breaking BCM4718A1")

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