On Wed, Feb 06, 2019 at 11:22:33AM +0100, Krzysztof Kozlowski wrote:
> On Wed, 6 Feb 2019 at 11:05, Charles Keepax
> <ckeepax@xxxxxxxxxxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxxxxxxxx>
> > ---
> >
> > 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@xxxxxxxxxx>
> Tested-by: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
>
> 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
