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Date:   Tue, 5 May 2020 17:01:49 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Netdev <netdev@...r.kernel.org>,
        linux- stable <stable@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Cc:     Eric Dumazet <edumazet@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Sasha Levin <sashal@...nel.org>,
        netfilter-devel@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        lkft-triage@...ts.linaro.org,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>, Jakub Kicinski <kuba@...nel.org>
Subject: stable-rc 4.19: NETDEV WATCHDOG: eth0 (asix): transmit queue 0 timed
 out - net/sched/sch_generic.c:466 dev_watchdog

While running selftests bpf test_sysctl on stable rc 4.19 branch kernel
on arm64 hikey device. The following warning was noticed.

[  118.957395] test_bpf: #296 BPF_MAXINSNS: exec all MSH
[  148.966435] ------------[ cut here ]------------
[  148.988349] NETDEV WATCHDOG: eth0 (asix): transmit queue 0 timed out
[  149.000832] WARNING: CPU: 0 PID: 0 at
/usr/src/kernel/net/sched/sch_generic.c:466 dev_watchdog+0x2b4/0x2c0
[  149.016470] Modules linked in: test_bpf(+) wl18xx wlcore mac80211
cfg80211 crc32_ce hci_uart crct10dif_ce btbcm snd_soc_audio_graph_card
bluetooth snd_soc_simple_card_utils adv7511 cec wlcore_sdio kirin_drm
dw_drm_dsi rfkill drm_kms_helper drm drm_panel_orientation_quirks fuse
[last unloaded: test_bpf]
[  149.056507] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.121-rc1 #1
[  149.069594] Hardware name: HiKey Development Board (DT)
[  149.081514] pstate: 80000005 (Nzcv daif -PAN -UAO)
[  149.093062] pc : dev_watchdog+0x2b4/0x2c0
[  149.103862] lr : dev_watchdog+0x2b4/0x2c0
[  149.114575] sp : ffff000008003d10
[  149.124613] x29: ffff000008003d10 x28: 0000000000000002
[  149.136698] x27: 0000000000000001 x26: 00000000ffffffff
[  149.148810] x25: 0000000000000180 x24: ffff800074c654b8
[  149.160891] x23: ffff800074c65460 x22: ffff8000748dd680
[  149.172993] x21: ffff00000974a000 x20: ffff800074c65000
[  149.185065] x19: 0000000000000000 x18: ffffffffffffffff
[  149.197172] x17: 0000000000000000 x16: 0000000000000000
[  149.209243] x15: 0000000000000001 x14: ffff000009062cd8
[  149.221234] x13: 0000000045a6fc2a x12: ffff00000975b630
[  149.233166] x11: 00000000ffffffff x10: ffff00000974fa48
[  149.245023] x9 : ffff0000097e3000 x8 : ffff00000974fa48
[  149.256818] x7 : ffff000008173694 x6 : ffff800077ee62d0
[  149.268639] x5 : ffff800077ee62d0 x4 : 0000000000000000
[  149.280412] x3 : ffff800077eef6c8 x2 : 0000000000000103
[  149.292120] x1 : d13523b333b73d00 x0 : 0000000000000000
[  149.303783] Call trace:
[  149.312481]  dev_watchdog+0x2b4/0x2c0
[  149.322463]  call_timer_fn+0xbc/0x3f0
[  149.332463]  expire_timers+0x104/0x220
[  149.342493]  run_timer_softirq+0xec/0x1a8
[  149.352784]  __do_softirq+0x114/0x554
[  149.362668]  irq_exit+0x144/0x150
[  149.372235]  __handle_domain_irq+0x6c/0xc0
[  149.382633]  gic_handle_irq+0x60/0xb0
[  149.392606]  el1_irq+0xb4/0x130
[  149.402031]  cpuidle_enter_state+0xbc/0x3f0
[  149.412572]  cpuidle_enter+0x34/0x48
[  149.422539]  call_cpuidle+0x44/0x78
[  149.432410]  do_idle+0x228/0x2a8
[  149.441959]  cpu_startup_entry+0x2c/0x30
[  149.452185]  rest_init+0x25c/0x270
[  149.461821]  start_kernel+0x468/0x494
[  149.471659] irq event stamp: 5706193
[  149.481376] hardirqs last  enabled at (5706192):
[<ffff00000817376c>] console_unlock+0x424/0x638
[  149.496628] hardirqs last disabled at (5706193):
[<ffff000008081490>] do_debug_exception+0xf8/0x1d0
[  149.512207] softirqs last  enabled at (5706160):
[<ffff0000080f94a8>] _local_bh_enable+0x28/0x48
[  149.527590] softirqs last disabled at (5706161):
[<ffff0000080f9bb4>] irq_exit+0x144/0x150
[  149.542410] ---[ end trace 4c7bd8e08a6a3d65 ]---
[  177.828500] jited:1 1366234 PASS

ref:
https://qa-reports.linaro.org/lkft/linux-stable-rc-4.19-oe/build/v4.19.120-38-g2e3613309d93/testrun/1415357/log

metadata:
  git branch: linux-4.19.y
  git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
  make_kernelversion: 4.19.121-rc1
  kernel-config:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/hikey/lkft/linux-stable-rc-4.19/530/config

-- 
Linaro LKFT
https://lkft.linaro.org

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