Re: [PATCH] Revert "ALSA: hda: Add support for Loongson 7A1000 controller"

[Tiezhu Yang]

On 08/25/2020 04:30 PM, Takashi Iwai wrote:
> On Tue, 25 Aug 2020 10:25:03 +0200,
> Tiezhu Yang wrote:
> > This reverts commit 61eee4a7fc40 ("ALSA: hda: Add support for Loongson
> > 7A1000 controller").
> >
> > With this patch, there exists the following error on the Loongson LS7A
> > platform:
> >
> > [  216.639938] rcu: INFO: rcu_preempt self-detected stall on CPU
> > [  216.645685] rcu:     0-....: (1 GPs behind) idle=d5a/1/0x4000000000000004 softirq=562/563 fqs=16476
> > [  216.654565]  (t=53772 jiffies g=-463 q=11976)
> > [  216.658923] NMI backtrace for cpu 0
> > [  216.662417] CPU: 0 PID: 68 Comm: kworker/0:2 Not tainted 5.8.0+ #3
> > [  216.668587] Hardware name:  , BIOS
> > [  216.672174] Workqueue: events azx_probe_work [snd_hda_intel]
> > [  216.677829] Stack : 0000000000000000 0000000000000000 ffffffff95004ce0 d786f9efa2288403
> > [  216.685848]         d786f9efa2288403 0000000000000000 98000001102638c8 ffffffff80cee270
> > [  216.693866]         0000000000000000 0000000000000000 0000000000000000 00000000000002b4
> > [  216.701883]         206b726f775f6562 0000000000000001 0000000000000000 ffffffff80f30000
> > [  216.709902]         ffffffff80f30000 ffffffff80d90000 0000000000000000 0000000000000000
> > [  216.717919]         0000000000000000 0000000000000000 0000000000000000 ffffffff80d90000
> > [  216.725937]         ffffffff80d90000 0000000000000007 ffffffff806aff18 0000000000000000
> > [  216.733955]         ffffffff80f00000 9800000110cc4000 98000001102638c0 ffffffff80d9db80
> > [  216.741974]         ffffffff8065a740 0000000000000000 0000000000000000 0000000000000000
> > [  216.749991]         000073746e657665 0000000000000000 ffffffff80211a64 d786f9efa2288403
> > [  216.758009]         ...
> > [  216.760464] Call Trace:
> > [  216.762920] [<ffffffff80211a64>] show_stack+0x9c/0x130
> > [  216.768058] [<ffffffff8065a740>] dump_stack+0xb0/0xf0
> > [  216.773110] [<ffffffff80665774>] nmi_cpu_backtrace+0x134/0x140
> > [  216.778939] [<ffffffff80665910>] nmi_trigger_cpumask_backtrace+0x190/0x200
> > [  216.785805] [<ffffffff802b1abc>] rcu_dump_cpu_stacks+0x12c/0x190
> > [  216.791806] [<ffffffff802b08cc>] rcu_sched_clock_irq+0xa2c/0xfc8
> > [  216.797808] [<ffffffff802b91d4>] update_process_times+0x2c/0xb8
> > [  216.803724] [<ffffffff802cad80>] tick_sched_timer+0x40/0xb8
> > [  216.809293] [<ffffffff802ba5f0>] __hrtimer_run_queues+0x118/0x1d0
> > [  216.815380] [<ffffffff802bab74>] hrtimer_interrupt+0x12c/0x2d8
> > [  216.821208] [<ffffffff8021547c>] c0_compare_interrupt+0x74/0xa0
> > [  216.827124] [<ffffffff80296bd0>] __handle_irq_event_percpu+0xa8/0x198
> > [  216.833558] [<ffffffff80296cf0>] handle_irq_event_percpu+0x30/0x90
> > [  216.839732] [<ffffffff8029d958>] handle_percpu_irq+0x88/0xb8
> > [  216.845388] [<ffffffff80296124>] generic_handle_irq+0x44/0x60
> > [  216.851131] [<ffffffff80b3cfd0>] do_IRQ+0x18/0x28
> > [  216.855838] [<ffffffff8067ace4>] plat_irq_dispatch+0x64/0x100
> > [  216.861579] [<ffffffff80209a20>] handle_int+0x140/0x14c
> > [  216.866802] [<ffffffff802402e8>] irq_exit+0xf8/0x100
> Could you edit the Oops message to drop unnecessary hex numbers,
> timestamps, and whatever redundant for readers?

OK, thanks for your reply.
I will do it and then send v2 soon.

Thanks,
Tiezhu

> thanks,
>
> Takashi