linux-kernel - Re: [GIT PULL] Networking for v5.15

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Date:   Wed, 1 Sep 2021 12:00:57 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Jakub Kicinski <kuba@...nel.org>,
        Luca Coelho <luciano.coelho@...el.com>,
        Kalle Valo <kvalo@...eaurora.org>
Cc:     David Miller <davem@...emloft.net>,
        Netdev <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-wireless <linux-wireless@...r.kernel.org>
Subject: Re: [GIT PULL] Networking for v5.15

On Tue, Aug 31, 2021 at 1:37 PM Jakub Kicinski <kuba@...nel.org> wrote:
>
> No conflicts at the time of writing. There were conflicts with
> char-misc but I believe Greg dropped the commits in question.

Hmm. I already merged this earlier, but didn't notice a new warning on
my desktop:

  RTNL: assertion failed at net/wireless/reg.c (4025)
  WARNING: CPU: 60 PID: 1720 at net/wireless/reg.c:4025
regulatory_set_wiphy_regd_sync+0x7f/0x90 [cfg80211]
  Call Trace:
   iwl_mvm_init_mcc+0x170/0x190 [iwlmvm]
   iwl_op_mode_mvm_start+0x824/0xa60 [iwlmvm]
   iwl_opmode_register+0xd0/0x130 [iwlwifi]
   init_module+0x23/0x1000 [iwlmvm]

and

  RTNL: assertion failed at net/wireless/reg.c (3106)
  WARNING: CPU: 60 PID: 1720 at net/wireless/reg.c:3106
reg_process_self_managed_hint+0x26c/0x280 [cfg80211]
  Call Trace:
   regulatory_set_wiphy_regd_sync+0x3a/0x90 [cfg80211]
   iwl_mvm_init_mcc+0x170/0x190 [iwlmvm]
   iwl_op_mode_mvm_start+0x824/0xa60 [iwlmvm]
   iwl_opmode_register+0xd0/0x130 [iwlwifi]
   init_module+0x23/0x1000 [iwlmvm]

and

  RTNL: assertion failed at net/wireless/core.c (84)
  WARNING: CPU: 60 PID: 1720 at net/wireless/core.c:84
wiphy_idx_to_wiphy+0x97/0xd0 [cfg80211]
  Call Trace:
   nl80211_common_reg_change_event+0xf9/0x1e0 [cfg80211]
   reg_process_self_managed_hint+0x23d/0x280 [cfg80211]
   regulatory_set_wiphy_regd_sync+0x3a/0x90 [cfg80211]
   iwl_mvm_init_mcc+0x170/0x190 [iwlmvm]
   iwl_op_mode_mvm_start+0x824/0xa60 [iwlmvm]
   iwl_opmode_register+0xd0/0x130 [iwlwifi]
   init_module+0x23/0x1000 [iwlmvm]

and

  RTNL: assertion failed at net/wireless/core.c (61)
  WARNING: CPU: 60 PID: 1720 at net/wireless/core.c:61
wiphy_idx_to_wiphy+0xbf/0xd0 [cfg80211]
  Call Trace:
   nl80211_common_reg_change_event+0xf9/0x1e0 [cfg80211]
   reg_process_self_managed_hint+0x23d/0x280 [cfg80211]
   regulatory_set_wiphy_regd_sync+0x3a/0x90 [cfg80211]
   iwl_mvm_init_mcc+0x170/0x190 [iwlmvm]
   iwl_op_mode_mvm_start+0x824/0xa60 [iwlmvm]
   iwl_opmode_register+0xd0/0x130 [iwlwifi]
   init_module+0x23/0x1000 [iwlmvm]

They all seem to have that same issue, and it looks like the fix would
be to get the RTN lock in iwl_mvm_init_mcc(), but I didn't really look
into it very much.

This is on my desktop, and I actually don't _use_ the wireless on this
machine. I assume it still works despite the warnings, but they should
get fixed.

I *don't* see these warnings on my laptop where I actually use
wireless, but that one uses ath10k_pci, so it seems this is purely a
iwlwifi issue.

I can't be the only one that sees this. Hmm?

                 Linus