From: Charles Keepax <ckeepax@opensource.cirrus.com>
To: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>, <alsa-devel@alsa-project.org>,
<linux-kernel@vger.kernel.org>,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCH] ASoC: dapm: Check for NULL widget in dapm_update_dai_unlocked
Date: Wed, 6 Feb 2019 10:59:55 +0000 [thread overview]
Message-ID: <20190206105955.GP3837@imbe.wolfsonmicro.main> (raw)
In-Reply-To: <CAJKOXPejBO_9iBHg1R8M2=tcuTck72DjxTYEUyQOp8cPV-0xTg@mail.gmail.com>
On Wed, Feb 06, 2019 at 11:22:33AM +0100, Krzysztof Kozlowski wrote:
> On Wed, 6 Feb 2019 at 11:05, Charles Keepax
> <ckeepax@opensource.cirrus.com> wrote:
> >
> > DAIs linked to the dummy will not have an associated playback/capture
> > widget, so we need to skip the update in that case.
> >
> > Fixes: 078a85f2806f ("ASoC: dapm: Only power up active channels from a DAI")
> > Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
> > ---
> >
> > Ok so that all makes sense, this patch is probably the best fix?
> >
> > Thanks,
> > Charles
>
> For this particular issue (NULL-pointer):
> Reported-by: Krzysztof Kozlowski <krzk@kernel.org>
> Tested-by: Krzysztof Kozlowski <krzk@kernel.org>
>
> However now I see bug sleeping in atomic context:
>
> [ 64.000828] BUG: sleeping function called from invalid context at
> ../kernel/locking/mutex.c:908
Does this probably definitely get fixed by reverting my patch?
It's just a bit odd as this seems to be complaining about a clock
operation in i2s_trigger and I don't think my patch should have
any affect on the trigger callback. It should get run from either
the dai_link DAPM event or hw_params, neither of which should
happen in an atomic context.
> [ 64.307534] the existing dependency chain (in reverse order) is:
> [ 64.314985]
> [ 64.314985] -> #1 (&(&pri_dai->spinlock)->rlock){....}:
> [ 64.321667] clk_mux_set_parent+0x34/0xb8
> [ 64.326162] clk_core_set_parent_nolock+0x21c/0x54c
> [ 64.331535] clk_set_parent+0x38/0x6c
> [ 64.335696] of_clk_set_defaults+0x11c/0x384
> [ 64.340460] of_clk_add_provider+0x8c/0xc8
> [ 64.345054] samsung_i2s_probe+0x484/0x64c
> [ 64.349651] platform_drv_probe+0x6c/0xa4
> [ 64.354153] really_probe+0x280/0x414
> [ 64.358311] driver_probe_device+0x78/0x1c4
> [ 64.362991] bus_for_each_drv+0x74/0xb8
> [ 64.367323] __device_attach+0xd4/0x16c
> [ 64.371655] bus_probe_device+0x88/0x90
> [ 64.375988] deferred_probe_work_func+0x4c/0xd0
> [ 64.381017] process_one_work+0x228/0x810
> [ 64.385520] worker_thread+0x30/0x570
> [ 64.389681] kthread+0x134/0x164
> [ 64.393405] ret_from_fork+0x14/0x20
> [ 64.397477] (null)
> [ 64.400249]
> [ 64.400249] -> #0 (prepare_lock){+.+.}:
> [ 64.405539] __mutex_lock+0x7c/0xa98
> [ 64.409610] mutex_lock_nested+0x1c/0x24
> [ 64.414029] clk_prepare_lock+0x50/0xf8
> [ 64.418362] clk_core_get_rate+0xc/0x60
> [ 64.422695] i2s_trigger+0x444/0x6c8
> [ 64.426768] soc_pcm_trigger+0x100/0x140
> [ 64.431188] snd_pcm_action_single+0x38/0x80
> [ 64.435953] snd_pcm_action+0x54/0x5c
> [ 64.440112] snd_pcm_action_lock_irq+0x28/0x3c
> [ 64.445052] snd_pcm_ioctl+0x920/0x123c
> [ 64.449386] do_vfs_ioctl+0xb0/0x9f8
> [ 64.453457] ksys_ioctl+0x34/0x5c
> [ 64.457269] ret_fast_syscall+0x0/0x28
> [ 64.461516] 0xbe8db8ec
Thanks,
Charles
next prev parent reply other threads:[~2019-02-06 11:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190205211638epcas3p409823d4acac8073473153d745151ea5f@epcas3p4.samsung.com>
2019-02-05 21:16 ` [BUG BISECT] NULL pointer after commit "ASoC: dapm: Only power up active channels from a DAI" Krzysztof Kozlowski
2019-02-06 9:46 ` Sylwester Nawrocki
2019-02-06 10:05 ` [PATCH] ASoC: dapm: Check for NULL widget in dapm_update_dai_unlocked Charles Keepax
2019-02-06 10:18 ` Sylwester Nawrocki
2019-02-06 10:22 ` Krzysztof Kozlowski
2019-02-06 10:59 ` Charles Keepax [this message]
2019-02-06 11:14 ` Krzysztof Kozlowski
2019-02-06 11:45 ` Charles Keepax
2019-02-06 15:47 ` Sylwester Nawrocki
2019-02-06 10:11 ` [BUG BISECT] NULL pointer after commit "ASoC: dapm: Only power up active channels from a DAI" Sylwester Nawrocki
2019-02-06 11:03 ` Charles Keepax
2019-02-06 9:58 ` Charles Keepax
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