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From:   Scott Branden <scott.branden@broadcom.com>
Subject: 5.15 Linux Regression in sound hda
Message-ID: <063e2397-7edb-5f48-7b0d-618b938d9dd8@broadcom.com>
Date:   Tue, 9 Nov 2021 13:12:30 -0800
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--00000000000074733a05d06191f9
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I'm reporting a new WARN_ON in sound/hda/hdac_bus.c that was not present 
in 5.15.  Sorry, I don't have time to bisect this right now but report 
is below.

dmesg in 5.14 kernel was:
snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops 0xffffffffaa2ac520)
GACT probability on
Mirror/redirect action on
Simple TC action Loaded
u32 classifier
     Performance counters on
     input device check on
     Actions configured
hdaudio hdaudioC0D0: Unable to bind the codec
hdaudio hdaudioC0D2: Unable to bind the codec

dmesg in 5.15 kernel produces WARN_ON in sound/hda/hdac_bus.c
snd_hda_intel 0000:00:1f.3: bound 0000:00:02.0 (ops 0xffffffffad8b02a0)
GACT probability on
Mirror/redirect action on
Simple TC action Loaded
u32 classifier
     Performance counters on
     input device check on
     Actions configured
snd_hda_intel 0000:00:1f.3: Cannot probe codecs, giving up
Initializing XFRM netlink socket
------------[ cut here ]------------
NET: Registered PF_INET6 protocol family
WARNING: CPU: 14 PID: 186 at sound/hda/hdac_bus.c:73 
snd_hdac_bus_exit+0x40/0x50

Segment Routing with IPv6
Modules linked in:
CPU: 14 PID: 186 Comm: kworker/14:2 Tainted: G          I       5.15.0 #1
Hardware name: ASUSTeK COMPUTER INC. System Product Name/WS C246 PRO, 
BIOS 1401 08/13/2020
In-situ OAM (IOAM) with IPv6
Workqueue: events azx_probe_work
sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver

RIP: 0010:snd_hdac_bus_exit+0x40/0x50
NET: Registered PF_PACKET protocol family
Code: 75 19 48 8b 57 58 48 8d 47 58 48 39 c2 75 1b 48 81 c7 f8 02 00 00 
e9 ff 97 57 ff 0f 0b 48 8b 57 58 48 8d 47 58 48 39 c2 74 e5 <0f> 0b 48 
81 c7 f8 02 00 00 e9 e2 97 57 ff 66 90 0f 1f 44 00 00 41
RPC: Registered rdma transport module.
RSP: 0000:ffffa545007b7e88 EFLAGS: 00010202
RPC: Registered rdma backchannel transport module.

Key type dns_resolver registered
RAX: ffff89f483078880 RBX: ffff89f483078828 RCX: 0000000080200010
RDX: ffff89f4830792f0 RSI: 0000000000000001 RDI: ffff89f483078828
RBP: ffff89f483078e70 R08: 0000000000000000 R09: ffffffffacf094a4
R10: 0000000000000004 R11: 0000000000000032 R12: ffff89f7dbda50c0
R13: ffff89f7dbda9100 R14: 0000000000000000 R15: ffff89f7dbda9105
FS:  0000000000000000(0000) GS:ffff89f7dbd80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000194a0c001 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
  azx_free+0xba/0x170
  process_one_work+0x1db/0x380
  worker_thread+0x4d/0x3e0
  ? rescuer_thread+0x370/0x370
  kthread+0x124/0x150
  ? set_kthread_struct+0x40/0x40
  ret_from_fork+0x1f/0x30
---[ end trace 9779b9e2ef53104c ]---

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