linux-kernel - Re: [REGRESSION] Bluetooth is not working on Macs with BCM4377 chip starting from kernel 6.5

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Message-ID: <ZVKxtD2Mt_eVyttJ@archie.me>
Date:   Tue, 14 Nov 2023 06:31:00 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Aditya Garg <gargaditya08@...e.com>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>
Cc:     Orlando Chamberlain <orlandoch.dev@...il.com>,
        Kerem Karabay <kekrby@...il.com>,
        Aun-Ali Zaidi <admin@...eit.net>,
        Asahi Linux Mailing List <asahi@...ts.linux.dev>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Bluetooth <linux-bluetooth@...r.kernel.org>
Subject: Re: [REGRESSION] Bluetooth is not working on Macs with BCM4377 chip
 starting from kernel 6.5

On Mon, Nov 13, 2023 at 08:57:35PM +0000, Aditya Garg wrote:
> Starting from kernel 6.5, a regression in the kernel is causing Bluetooth to not work on T2 Macs with BCM4377 chip.
> 
> Journalctl of kernel 6.4.8 which has Bluetooth working is given here: https://pastebin.com/u9U3kbFJ
> 
> Journalctl of kernel 6.5.2, which has Bluetooth broken is given here: https://pastebin.com/aVHNFMRs
> 
> Also, the bug hasn’t been fixed even in 6.6.1, as reported by users.

Can you bisect this regression please?

> 
> Some relevant bits imo:
> 
>     • Sep 19 21:24:36 RudyUbuMbp kernel: hci_bcm4377 0000:73:00.1: can't disable ASPM; OS doesn't have ASPM control
> 
>     • Nov 14 01:29:28 RudyUbuMbp kernel: Call Trace:
>     • Nov 14 01:29:28 RudyUbuMbp kernel: <TASK>
>     • Nov 14 01:29:28 RudyUbuMbp kernel: dump_stack_lvl+0x48/0x70
>     • Nov 14 01:29:28 RudyUbuMbp kernel: dump_stack+0x10/0x20
>     • Nov 14 01:29:28 RudyUbuMbp kernel: __ubsan_handle_shift_out_of_bounds+0x156/0x310
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? ttwu_do_activate+0x80/0x290
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? raw_spin_rq_unlock+0x10/0x40
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? try_to_wake_up+0x292/0x6c0
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? sched_slice+0x76/0x140
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? reweight_entity+0x15c/0x170
>     • Nov 14 01:29:28 RudyUbuMbp kernel: __reg_op.cold+0x14/0x38
>     • Nov 14 01:29:28 RudyUbuMbp kernel: bitmap_release_region+0xe/0x20
>     • Nov 14 01:29:28 RudyUbuMbp kernel: bcm4377_handle_ack+0x8c/0x130 [hci_bcm4377]
>     • Nov 14 01:29:28 RudyUbuMbp kernel: bcm4377_poll_completion_ring+0x196/0x330 [hci_bcm4377]
>     • Nov 14 01:29:28 RudyUbuMbp kernel: ? rcu_gp_kthread_wake+0x57/0x90
>     • Nov 14 01:29:28 RudyUbuMbp kernel: bcm4377_irq+0x77/0x140 [hci_bcm4377]
>     • Nov 14 01:29:28 RudyUbuMbp kernel: __handle_irq_event_percpu+0x4c/0x1b0
>     • Nov 14 01:29:28 RudyUbuMbp kernel: handle_irq_event+0x39/0x80
>     • Nov 14 01:29:28 RudyUbuMbp kernel: handle_edge_irq+0x8c/0x250
>     • Nov 14 01:29:28 RudyUbuMbp kernel: __common_interrupt+0x4f/0x110
>     • Nov 14 01:29:28 RudyUbuMbp kernel: common_interrupt+0x45/0xb0
>     • Nov 14 01:29:28 RudyUbuMbp kernel: asm_common_interrupt+0x27/0x40
>     • Nov 14 01:29:28 RudyUbuMbp kernel: RIP: 0033:0x7f17b5fd8bca

Anyway, thanks for the regression report. I'm adding it to regzbot:

#regzbot ^introduced: v6.4..v6.5

-- 
An old man doll... just what I always wanted! - Clara

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