linux-kernel - Several WARNINGs after iwlwifi "Microcode SW error detected."

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Message-ID: <CA+ydwtoEszB=riuHA2a38yTjAgu=bJ5TzPAqZzGxS7QR+FNw+g@mail.gmail.com>
Date:   Mon, 12 Mar 2018 10:06:49 +0200
From:   Tommi Rantala <tt.rantala@...il.com>
To:     linux-wireless@...r.kernel.org
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: Several WARNINGs after iwlwifi "Microcode SW error detected."

Hi,

There was apparently some wifi / firmware problem.
Kernel version is 4.16.0-rc5
Laptop is HP zbook 15 G3.

The recovery worked, and the wifi connection was soon re-established,
but several WARNINGs seen in the logs that don't look good.

Based on journal logs, similar "Microcode SW" errors did not trigger
the warnings in 4.14.x fedora kernels.

Any fixing needed...?

lspci:
02:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
       Subsystem: Intel Corporation Dual Band Wireless-AC 8260
       Flags: bus master, fast devsel, latency 0, IRQ 127
       Memory at e4100000 (64-bit, non-prefetchable) [size=8K]
       Capabilities: [c8] Power Management version 3
       Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
       Capabilities: [40] Express Endpoint, MSI 00
       Kernel driver in use: iwlwifi
       Kernel modules: iwlwifi


[ 1267.643650] WARNING: CPU: 2 PID: 1100 at
drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:2588
iwl_mvm_mac_sta_state+0x544/0x690 [iwlmvm]
[ 1267.644398] WARNING: CPU: 2 PID: 1100 at
net/mac80211/sta_info.c:994 __sta_info_destroy_part2+0xed/0x140
[mac80211]
[ 1267.645027] WARNING: CPU: 2 PID: 1100 at
net/mac80211/sta_info.c:1002 __sta_info_destroy_part2+0x116/0x140
[mac80211]
[ 1267.646200] WARNING: CPU: 2 PID: 1100 at
drivers/net/wireless/intel/iwlwifi/mvm/binding.c:216
iwl_mvm_binding_remove_vif+0x74/0x90 [iwlmvm]
[ 1267.648212] WARNING: CPU: 3 PID: 69 at net/mac80211/key.c:735
ieee80211_enable_keys+0x116/0x120 [mac80211]
[ 1267.659618] WARNING: CPU: 3 PID: 7333 at net/mac80211/key.c:121
decrease_tailroom_need_count+0x53/0x60 [mac80211]
[ 1267.660245] WARNING: CPU: 3 PID: 7333 at net/mac80211/key.c:905
ieee80211_free_keys+0x184/0x190 [mac80211]

Tommi

Download attachment "dmesg-iwlwifi-4.16.0-rc5-zbook" of type "application/octet-stream" (118644 bytes)