Hi Mark > When ASoC driver is unbound dynamically during its operation (i.e. a > kind of hot-unplug), we may hit Oops due to the resource access after > the release by a delayed work, something like: > > Unable to handle kernel paging request at virtual address dead000000000220 > .... > PC is at soc_dapm_dai_stream_event.isra.14+0x20/0xd0 > LR is at snd_soc_dapm_stream_event+0x74/0xa8 > .... > [<ffff000008715610>] soc_dapm_dai_stream_event.isra.14+0x20/0xd0 > [<ffff00000871989c>] snd_soc_dapm_stream_event+0x74/0xa8 > [<ffff00000871b23c>] close_delayed_work+0x3c/0x50 > [<ffff0000080bbd6c>] process_one_work+0x1ac/0x318 > [<ffff0000080bbf20>] worker_thread+0x48/0x420 > [<ffff0000080c201c>] kthread+0xfc/0x128 > [<ffff0000080842f0>] ret_from_fork+0x10/0x18 > > For fixing the race, this patch adds a sync-point in pcm private_free > callback to finish the delayed work before actually releasing the > resources. > > Reported-by: Hiep Cao Minh <cm-hiep@xxxxxxxxxxx> > Reported-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx> > Signed-off-by: Takashi Iwai <tiwai@xxxxxxx> > --- This patch solved my issue, can you consider this ? Best regards --- Kuninori Morimoto _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
