The tasklet is an old API that should be deprecated, usually can be converted to another decent API. In ASoC SH SIU driver, a tasklet is still used for offloading the hardware reset function. It can be achieved gracefully with a work queued, too.
This patch replaces the tasklet usage in SH SIU driver with a simple work. The conversion is fairly straightforward.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/soc/sh/siu.h | 2 +- sound/soc/sh/siu_pcm.c | 21 +++++++++++---------- 2 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/sound/soc/sh/siu.h b/sound/soc/sh/siu.h index 63a508fdfe78..6201840f1bc0 100644 --- a/sound/soc/sh/siu.h +++ b/sound/soc/sh/siu.h @@ -96,7 +96,7 @@ struct siu_info { };
struct siu_stream { - struct tasklet_struct tasklet; + struct work_struct work; struct snd_pcm_substream *substream; snd_pcm_format_t format; size_t buf_bytes; diff --git a/sound/soc/sh/siu_pcm.c b/sound/soc/sh/siu_pcm.c index 50fc7810723e..45c4320976ab 100644 --- a/sound/soc/sh/siu_pcm.c +++ b/sound/soc/sh/siu_pcm.c @@ -70,7 +70,7 @@ static int siu_pcm_stmwrite_start(struct siu_port *port_info) siu_stream->rw_flg = RWF_STM_WT;
/* DMA transfer start */ - tasklet_schedule(&siu_stream->tasklet); + queue_work(system_highpri_wq, &siu_stream->work);
return 0; } @@ -93,7 +93,7 @@ static void siu_dma_tx_complete(void *arg) siu_stream->cur_period * siu_stream->period_bytes, siu_stream->buf_bytes, siu_stream->cookie);
- tasklet_schedule(&siu_stream->tasklet); + queue_work(system_highpri_wq, &siu_stream->work);
/* Notify alsa: a period is done */ snd_pcm_period_elapsed(siu_stream->substream); @@ -198,9 +198,10 @@ static int siu_pcm_rd_set(struct siu_port *port_info, return 0; }
-static void siu_io_tasklet(struct tasklet_struct *t) +static void siu_io_work(struct work_struct *work) { - struct siu_stream *siu_stream = from_tasklet(siu_stream, t, tasklet); + struct siu_stream *siu_stream = container_of(work, struct siu_stream, + work); struct snd_pcm_substream *substream = siu_stream->substream; struct device *dev = substream->pcm->card->dev; struct snd_pcm_runtime *rt = substream->runtime; @@ -253,7 +254,7 @@ static int siu_pcm_stmread_start(struct siu_port *port_info) /* during stmread flag set */ siu_stream->rw_flg = RWF_STM_RD;
- tasklet_schedule(&siu_stream->tasklet); + queue_work(system_highpri_wq, &siu_stream->work);
return 0; } @@ -519,9 +520,9 @@ static int siu_pcm_new(struct snd_soc_component *component,
(*port_info)->pcm = pcm;
- /* IO tasklets */ - tasklet_setup(&(*port_info)->playback.tasklet, siu_io_tasklet); - tasklet_setup(&(*port_info)->capture.tasklet, siu_io_tasklet); + /* IO works */ + INIT_WORK(&(*port_info)->playback.work, siu_io_work); + INIT_WORK(&(*port_info)->capture.work, siu_io_work); }
dev_info(card->dev, "SuperH SIU driver initialized.\n"); @@ -534,8 +535,8 @@ static void siu_pcm_free(struct snd_soc_component *component, struct platform_device *pdev = to_platform_device(pcm->card->dev); struct siu_port *port_info = siu_ports[pdev->id];
- tasklet_kill(&port_info->capture.tasklet); - tasklet_kill(&port_info->playback.tasklet); + cancel_work_sync(&port_info->capture.work); + cancel_work_sync(&port_info->playback.work);
siu_free_port(port_info);