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Message-ID: <CAMhs-H8Wsin67gTLPfv9x=hHM-prz4YYensNtyc=hZx+s4d=9Q@mail.gmail.com> Date: Tue, 13 Sep 2022 10:31:14 +0200 From: Sergio Paracuellos <sergio.paracuellos@...il.com> To: Lorenzo Bianconi <lorenzo@...nel.org> Cc: Arınç ÜNAL <arinc.unal@...nc9.com>, netdev <netdev@...r.kernel.org>, paulmck@...nel.org Subject: Re: mtk_eth_soc for mt7621 won't work after 6.0-rc1 Hi Lorenzo, On Tue, Sep 13, 2022 at 5:32 AM Sergio Paracuellos <sergio.paracuellos@...il.com> wrote: > > Hi Lorenzo, > > On Mon, Sep 12, 2022 at 10:30 PM Lorenzo Bianconi <lorenzo@...nel.org> wrote: > > > > > Hi Lorenzo, > > > > > > On 12.09.2022 21:01, Lorenzo Bianconi wrote: > > > > > > Ethernet for MT7621 SoCs no longer works after changes introduced to > > > > > > mtk_eth_soc with 6.0-rc1. Ethernet interfaces initialise fine. Packets are > > > > > > sent out from the interface fine but won't be received on the interface. > > > > > > > > > > > > Tested with MT7530 DSA switch connected to gmac0 and ICPlus IP1001 PHY > > > > > > connected to gmac1 of the SoC. > > > > > > > > > > > > Last working kernel is 5.19. The issue is present on 6.0-rc5. > > > > > > > > > > > > Arınç > > > > > > > > > > Hi Arınç, > > > > > > > > > > thx for testing and reporting the issue. Can you please identify > > > > > the offending commit running git bisect? > > > > > > > > > > Regards, > > > > > Lorenzo > > > > > > > > Hi Arınç, > > > > > > > > just a small update. I tested a mt7621 based board (Buffalo WSR-1166DHP) with > > > > OpenWrt master + my mtk_eth_soc series and it works fine. Can you please > > > > provide more details about your development board/environment? > > > > > > I've got a GB-PC2, Sergio has got a GB-PC1. We both use Neil's gnubee-tools > > > which makes an image with filesystem and any Linux kernel of choice with > > > slight modifications (maybe not at all) on the kernel. > > > > > > https://github.com/neilbrown/gnubee-tools > > > > > > Sergio experiences the same problem on GB-PC1. > > > > ack, can you please run git bisect in order to identify the offending commit? > > What is the latest kernel version that is working properly? 5.19.8? > > I'll try to get time today to properly bisect and identify the > offending commit. I get a working platform with 5.19.8, yes but with > v6-rc-1 my network is totally broken. + [cc: Paul E. McKenney <paulmck@...nel.org> as commit author] Ok, so I have bisected the issue to: 1cf1144e8473e8c3180ac8b91309e29b6acfd95f] rcu-tasks: Be more patient for RCU Tasks boot-time testing This is the complete bisect log: $ git bisect log git bisect start # good: [70cb6afe0e2ff1b7854d840978b1849bffb3ed21] Linux 5.19.8 git bisect good 70cb6afe0e2ff1b7854d840978b1849bffb3ed21 # bad: [568035b01cfb107af8d2e4bd2fb9aea22cf5b868] Linux 6.0-rc1 git bisect bad 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 # good: [3d7cb6b04c3f3115719235cc6866b10326de34cd] Linux 5.19 git bisect good 3d7cb6b04c3f3115719235cc6866b10326de34cd # bad: [b44f2fd87919b5ae6e1756d4c7ba2cbba22238e1] Merge tag 'drm-next-2022-08-03' of git://anongit.freedesktop.org/drm/drm git bisect bad b44f2fd87919b5ae6e1756d4c7ba2cbba22238e1 # bad: [526942b8134cc34d25d27f95dfff98b8ce2f6fcd] Merge tag 'ata-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata git bisect bad 526942b8134cc34d25d27f95dfff98b8ce2f6fcd # good: [2e7a95156d64667a8ded606829d57c6fc92e41df] Merge tag 'regmap-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap git bisect good 2e7a95156d64667a8ded606829d57c6fc92e41df # good: [c013d0af81f60cc7dbe357c4e2a925fb6738dbfe] Merge tag 'for-5.20/block-2022-07-29' of git://git.kernel.dk/linux-block git bisect good c013d0af81f60cc7dbe357c4e2a925fb6738dbfe # bad: [aad26f55f47a33d6de3df65f0b18e2886059ed6d] Merge tag 'docs-6.0' of git://git.lwn.net/linux git bisect bad aad26f55f47a33d6de3df65f0b18e2886059ed6d # good: [c2a24a7a036b3bd3a2e6c66730dfc777cae6540a] Merge tag 'v5.20-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 git bisect good c2a24a7a036b3bd3a2e6c66730dfc777cae6540a # bad: [34bc7b454dc31f75a0be7ee8ab378135523d7c51] Merge branch 'ctxt.2022.07.05a' into HEAD git bisect bad 34bc7b454dc31f75a0be7ee8ab378135523d7c51 # bad: [e72ee5e1a866b85cb6c3d4c80a1125976020a7e8] rcu-tasks: Use delayed_work to delay rcu_tasks_verify_self_tests() git bisect bad e72ee5e1a866b85cb6c3d4c80a1125976020a7e8 # good: [f90f19da88bfe32dd1fdfd104de4c0526a3be701] rcu-tasks: Make RCU Tasks Trace stall warning handle idle offline tasks git bisect good f90f19da88bfe32dd1fdfd104de4c0526a3be701 # good: [dc7d54b45170e1e3ced9f86718aa4274fd727790] rcu-tasks: Pull in tasks blocked within RCU Tasks Trace readers git bisect good dc7d54b45170e1e3ced9f86718aa4274fd727790 # good: [e386b6725798eec07facedf4d4bb710c079fd25c] rcu-tasks: Eliminate RCU Tasks Trace IPIs to online CPUs git bisect good e386b6725798eec07facedf4d4bb710c079fd25c # good: [eea3423b162d5d5cdc08af23e8ee2c2d1134fd07] rcu-tasks: Update comments git bisect good eea3423b162d5d5cdc08af23e8ee2c2d1134fd07 # bad: [1cf1144e8473e8c3180ac8b91309e29b6acfd95f] rcu-tasks: Be more patient for RCU Tasks boot-time testing git bisect bad 1cf1144e8473e8c3180ac8b91309e29b6acfd95f # first bad commit: [1cf1144e8473e8c3180ac8b91309e29b6acfd95f] rcu-tasks: Be more patient for RCU Tasks boot-time testing I don't really understand the relationship with my broken network issue. I am using debian buster and the effect I see is that when the network interface becomes up it hangs waiting for a "task running to raise network interfaces". After about one minute the system boots, the login prompt is shown but I cannot configure at all network interfaces: dhclient does not respond and manually ifconfig does not help also: root@...bee:~# root@...bee:~# dhclient ethblack ^C root@...bee:~# ifconfig ethblack 192.168.1.101 root@...bee:~# ping 19^C root@...bee:~# ping 192.168.1.47 PING 192.168.1.47 (192.168.1.47) 56(84) bytes of data. ^C --- 192.168.1.47 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 120ms I have tried to revert the bad commit directly in v6.0-rc1 but conflicts appeared with the git revert command in 'kernel/rcu/tasks.h', so I am not sure what I can do now. Thanks, Sergio Paracuellos > > Thanks, > Sergio Paracuellos > > > > > Regards, > > Lorenzo > > > > > > > > Arınç
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