Bug 199549 - r8169 doesn't work for 5 minutes after boot until `NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out`
Summary: r8169 doesn't work for 5 minutes after boot until `NETDEV WATCHDOG: eth0 (r81...
Alias: None
Product: Drivers
Classification: Unclassified
Component: Network (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_network@kernel-bugs.osdl.org
Depends on:
Reported: 2018-04-27 20:10 UTC by ojab
Modified: 2021-06-02 12:06 UTC (History)
5 users (show)

See Also:
Kernel Version: 4.17-rc2
Regression: No
Bisected commit-id:

stacktrace in the more readable format (3.78 KB, text/plain)
2018-04-27 20:12 UTC, ojab
lspci -vvvnn -s 06:00.0 (3.52 KB, text/plain)
2018-04-27 20:13 UTC, ojab
Full dmesg until stacktrace (71.97 KB, text/plain)
2018-05-03 08:47 UTC, ojab
dmesg of interface hang on boot (85.44 KB, text/plain)
2020-09-09 00:08 UTC, nmr

Description ojab 2018-04-27 20:10:51 UTC
I have new motherboard (ASUS A320-K) with 10ec:8168 realtek network card installed [let's call it A] and for 5 minutes after boot it doesn't work: with another computer connected via ethernet patch cord [let's call it B] I see outgoing packets on both A & B, but there is no incoming packets on them.
So it looks like that packets from A are not actually transmitted and packets to A are not actually passed from card to kernel.

After several minutes (200-300 seconds) I see

[  256.996145] ------------[ cut here ]------------
[  256.997574] NETDEV WATCHDOG: eth0 (r8169): transmit queue 0 timed out
[  256.998992] WARNING: CPU: 6 PID: 0 at dev_watchdog+0x1f2/0x200
[  257.000401] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink nfsd auth_rpcgss oid_registry nfs_acl lockd grace sunrpc sit tunnel4 ip_tunnel af_packet bridge stp llc ipv6 ipt_MASQUERADE nf_nat_masquerade_ipv4 xt_conntrack iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_filter ip_tables x_tables tcp_bbr sch_fq_codel arc4 joydev input_leds hid_generic usbhid hid btrfs libcrc32c xor zstd_compress lzo_compress zlib_deflate raid6_pq zstd_decompress xxhash zlib_inflate lzo_decompress amdgpu edac_mce_amd kvm_amd kvm mfd_core chash gpu_sched drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops irqbypass ttm crc32_pclmul ath10k_pci crc32c_intel snd_hda_codec_realtek pps_ldisc drm snd_hda_codec_generic ath10k_core pps_core snd_hda_codec_hdmi ath drm_panel_orientation_quirks
[  257.006778]  evdev snd_hda_intel cfbfillrect cfbimgblt cfbcopyarea mac80211 i2c_algo_bit fb snd_hda_codec aesni_intel snd_hwdep snd_hda_core aes_x86_64 font crypto_simd 8250 fbdev video cryptd xhci_pci glue_helper backlight xhci_hcd 8250_base sp5100_tco cfg80211 snd_pcm serial_core i2c_piix4 rtc_cmos mpt3sas i2c_core r8169 snd_timer usbcore snd mii soundcore k10temp raid_class hwmon scsi_transport_sas button usb_common acpi_cpufreq processor unix
[  257.010397] CPU: 6 PID: 0 Comm: swapper/6 Tainted: G                T 4.17.0-rc2-ojab #9
[  257.012243] RIP: 0010:dev_watchdog+0x1f2/0x200
[  257.014076] RSP: 0018:ffffa0505ef83e90 EFLAGS: 00010286
[  257.015890] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffffbce2eba8
[  257.017698] RDX: 0000000000000001 RSI: 0000000000000082 RDI: ffffffffbd221bc8
[  257.019502] RBP: ffffa0503c174430 R08: 00000000000003f6 R09: 0000000000aaaaaa
[  257.021296] R10: 0000000000000001 R11: 00000000ffffffff R12: ffffa0503c174000
[  257.023085] R13: 0000000000000006 R14: ffffa0503c174430 R15: ffffa0505ef94840
[  257.024869] FS:  0000000000000000(0000) GS:ffffa0505ef80000(0000) knlGS:0000000000000000
[  257.026661] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  257.028447] CR2: 00007ff5e3012000 CR3: 00000007e5546000 CR4: 00000000003406e0
[  257.030244] Call Trace:
[  257.032044]  <IRQ>
[  257.033829]  ? pfifo_fast_init+0x150/0x150
[  257.035618]  call_timer_fn+0x2b/0x120
[  257.037400]  run_timer_softirq+0x2f4/0x410
[  257.039170]  ? pfifo_fast_init+0x150/0x150
[  257.040931]  ? timerqueue_add+0x52/0x80
[  257.042694]  ? __hrtimer_run_queues+0x161/0x2e0
[  257.044462]  __do_softirq+0x111/0x32c
[  257.046223]  irq_exit+0x85/0x90
[  257.047966]  smp_apic_timer_interrupt+0x6c/0x120
[  257.049720]  apic_timer_interrupt+0xf/0x20
[  257.051475]  </IRQ>
[  257.053212] RIP: 0010:cpuidle_enter_state+0xaf/0x2c0
[  257.054948] RSP: 0018:ffffbbfdc013fe98 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
[  257.056696] RAX: 0000000000000001 RBX: 0000000000128637 RCX: 000000000000001f
[  257.058460] RDX: 0000003bd629e3bc RSI: 00000000239f5376 RDI: 0000000000000000
[  257.060213] RBP: ffffa0503973f200 R08: 0000000000000006 R09: 0000000000000002
[  257.061957] R10: 0000000000000000 R11: 0000000000000394 R12: 0000000000000002
[  257.063689] R13: ffffffffc00d31d8 R14: 0000000000000000 R15: 0000003bd6175d85
[  257.065435]  ? cpuidle_enter_state+0xab/0x2c0
[  257.067173]  do_idle+0x108/0x1f0
[  257.068918]  cpu_startup_entry+0x6f/0x80
[  257.070640]  start_secondary+0x183/0x1b0
[  257.072338]  secondary_startup_64+0xa5/0xb0
[  257.074032] Code: 2e 00 48 63 4d f0 eb 91 4c 89 e7 c6 05 6b da 99 00 01 e8 62 1e fd ff 89 d9 48 89 c2 4c 89 e6 48 c7 c7 b8 63 bf bc e8 3e 07 b3 ff <0f> 0b eb bd 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 83
[  257.075877] ---[ end trace 43c719e1948fb619 ]---

and cards start working absolutely fine.

rtl_nic firmware is installed from linux-firmware git.

Maybe duplicate of https://bugzilla.kernel.org/show_bug.cgi?id=110431, but I'm not sure since there is not much info in that bugreport.
Comment 1 ojab 2018-04-27 20:12:00 UTC
Created attachment 275627 [details]
stacktrace in the more readable format
Comment 2 ojab 2018-04-27 20:13:00 UTC
Created attachment 275629 [details]
lspci -vvvnn -s 06:00.0
Comment 3 Heiner Kallweit 2018-05-03 08:39:35 UTC
There are lots of different versions of this network chip. Could you please provide a full dmesg output?

In addition:
- Does any earlier kernel version work? (IOW: is it a regression?)
- Does the vendor Linux driver (r8168) from Realtek work?
- Did you check with other OS (Windows)?
Comment 4 ojab 2018-05-03 08:47:31 UTC
Created attachment 275741 [details]
Full dmesg until stacktrace
Comment 5 ojab 2018-05-03 22:07:36 UTC
It's actually a regression, with this commit reverted 4.17-rc3 works fine:

a92a08499b1f9d74eb5ed77ea04c0e42aab46e9a is the first bad commit
commit a92a08499b1f9d74eb5ed77ea04c0e42aab46e9a
Author: Heiner Kallweit <hkallweit1@gmail.com>
Date:   Mon Jan 8 21:39:13 2018 +0100

    r8169: improve runtime pm in general and suspend unused ports

    So far rpm doesn't cover cases like unused ports which are never
    brought up. If they are active at probe time they remain in this state.
    Included in this patch:

    - Let the idle notification check whether we can suspend and let it
      schedule the suspend. This way we don't need to have calls to
      pm_schedule_suspend in different places.

    - At the end of rtl_open and rtl_init_one send an idle notification
      to allow suspending if the link is down. If a cable is plugged in
      aneg is finished before the suspend timer expires and the suspend
      request is cancelled.

    - Change rtl8169_runtime_suspend to power down the chip if the
      interface is down.

    Successfully tested on a RTL8168evl (mac version 34).

    Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>

:040000 040000 2823af078aa633b890c340e79f1591d80560ceb3 6060585cd59f01a74dbf8447ebe1b1af509a69a0 M      drivers

git bisect start
# good: [d8a5b80568a9cb66810e75b182018e9edb68e8ff] Linux 4.15
git bisect good d8a5b80568a9cb66810e75b182018e9edb68e8ff
# bad: [0adb32858b0bddf4ada5f364a84ed60b196dbcda] Linux 4.16
git bisect bad 0adb32858b0bddf4ada5f364a84ed60b196dbcda
# bad: [c14376de3a1befa70d9811ca2872d47367b48767] printk: Wake klogd when passing console_lock owner
git bisect bad c14376de3a1befa70d9811ca2872d47367b48767
# good: [a103950e0dd2058df5e8a8d4a915707bdcf205f0] Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
git bisect good a103950e0dd2058df5e8a8d4a915707bdcf205f0
# bad: [0542e13b5f5663ffdc18e0e028413b2cd09f426f] Merge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
git bisect bad 0542e13b5f5663ffdc18e0e028413b2cd09f426f
# good: [8a4816cad00bf14642f0ed6043b32d29a05006ce] tg3: Add Macronix NVRAM support
git bisect good 8a4816cad00bf14642f0ed6043b32d29a05006ce
# bad: [e8a9d9683c8a62f917c19e57f1618363fb9ed04e] Merge branch 'bpf-libbpf-cleanups'
git bisect bad e8a9d9683c8a62f917c19e57f1618363fb9ed04e
# good: [4312782479fbf7c5efb9a6f19ad90f8d924055c1] net/mlx5e: IPoIB, Fix spelling mistake "functionts" -> "functions"
git bisect good 4312782479fbf7c5efb9a6f19ad90f8d924055c1
# bad: [532b5aa0b41ae908842166be4d17fffa53590bf0] Merge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue
git bisect bad 532b5aa0b41ae908842166be4d17fffa53590bf0
# bad: [398958ae48f44bb036d0fa9829cd489270bf1fc2] ipv6: Add support for non-equal-cost multipath
git bisect bad 398958ae48f44bb036d0fa9829cd489270bf1fc2
# bad: [61ad64080e039dce99a7f8d89b729bbea995e2f7] Merge branch 'r8169-improve-runtime-pm'
git bisect bad 61ad64080e039dce99a7f8d89b729bbea995e2f7
# good: [8d5dee21f6f01f4632c10b750709a1383eefc7aa] tipc: a couple of cleanups
git bisect good 8d5dee21f6f01f4632c10b750709a1383eefc7aa
# good: [8348500f80d5660af29c475e1f15d412d83564c9] tipc: add option to suppress PUBLISH events for pre-existing publications
git bisect good 8348500f80d5660af29c475e1f15d412d83564c9
# good: [fdb533c30496665775867fc9dabd83e8b0308822] Merge branch 'tipc-improvements-to-group-messaging'
git bisect good fdb533c30496665775867fc9dabd83e8b0308822
# good: [ef4d5fccebe9253fd2c934b7a1119c9c9f2b9306] r8169: improve runtime pm in rtl8169_check_link_status
git bisect good ef4d5fccebe9253fd2c934b7a1119c9c9f2b9306
# bad: [a92a08499b1f9d74eb5ed77ea04c0e42aab46e9a] r8169: improve runtime pm in general and suspend unused ports
git bisect bad a92a08499b1f9d74eb5ed77ea04c0e42aab46e9a
# first bad commit: [a92a08499b1f9d74eb5ed77ea04c0e42aab46e9a] r8169: improve runtime pm in general and suspend unused ports
Comment 6 Heiner Kallweit 2018-05-06 17:48:05 UTC
Thanks for bisecting!

With this patch the NIC runtime-suspends after 10s w/o link. In most cases the network is brought up in less time, in your case however the network is brought up >12s after loading the driver. Means it's suspended already.

This shouldn't be a problem because bringing up the network interface also resumes the NIC. This seems to fail in your case.
As I see it there is nothing wrong with the patch but it reveals another problem which has been existing before.

Just two days ago I got a Asus H310I-Plus Mobo with the same RTL8168h chip and I can reproduce the issue.

What should help as a workaround: disable Runtime PM
Usually Runtime PM for PCI devices isn't enabled per default. There should be somewhere a command like:
echo auto > /sys/bus/pci/devices/0000:06:00.0/power/control
If you disable this command, I'd expect the issue to be gone.

Root cause seems to be that the PHY isn't fully resumed yet when configuration starts. I checked the vendor driver and it has a delay for certain chip types.
The following fixes the issue for me. Could you please check whether this patch fixes your network?

diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c
index 604ae783..c7aac1fc 100644
--- a/drivers/net/ethernet/realtek/r8169.c
+++ b/drivers/net/ethernet/realtek/r8169.c
@@ -4981,6 +4981,9 @@ static void rtl_pll_power_down(struct rtl8169_private *tp)
 static void rtl_pll_power_up(struct rtl8169_private *tp)
        rtl_generic_op(tp, tp->pll_power_ops.up);
+       /* give MAC/PHY some time to resume */
+       msleep(20);

 static void rtl_init_pll_power_ops(struct rtl8169_private *tp)
Comment 7 ojab 2018-05-07 17:41:26 UTC
Works fine with this patch, thanks.
Comment 8 Heiner Kallweit 2018-05-14 07:24:35 UTC
Should be fixed with commit 3148dedfe79e ("r8169: fix powering up RTL8168h") in 4.17-rc5.
Comment 9 ojab 2018-05-14 18:43:21 UTC
Thanks, 4-17-rc5 works fine here.
Comment 10 nmr 2020-09-08 23:57:03 UTC
FWIW I am seeing a similar hang in 

Linux waldorf 5.7.0-3-amd64 #1 SMP Debian 5.7.17-1 (2020-08-23) x86_64 GNU/Linux

Same PCI ID, I think:

05:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 09)
	Subsystem: ASUSTeK Computer Inc. P8 series motherboard [1043:8505]
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 16
	Region 0: I/O ports at d000 [size=256]
	Region 2: Memory at f0304000 (64-bit, prefetchable) [size=4K]
	Region 4: Memory at f0300000 (64-bit, prefetchable) [size=16K]
	Capabilities: <access denied>
	Kernel driver in use: r8169
	Kernel modules: r8169

Seems to happen ~reliably on boot for me. Replugging the link seems to fix it.

Will attach dmesg. Happy to open a new bug if you would prefer, don't really know what I'm doing.
Comment 11 nmr 2020-09-09 00:08:55 UTC
Created attachment 292441 [details]
dmesg of interface hang on boot

Note You need to log in before you can comment on or make changes to this bug.