The patch
ASoC: wm_adsp: Fix some subtle races on compressed stream
has been applied to the asoc tree at
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git
All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying to this mail.
Thanks, Mark
From 612047f0baefe2aeef1bc5ad8c7107a532b7d957 Mon Sep 17 00:00:00 2001
From: Charles Keepax ckeepax@opensource.wolfsonmicro.com Date: Mon, 28 Mar 2016 14:29:22 +0100 Subject: [PATCH] ASoC: wm_adsp: Fix some subtle races on compressed stream
Firstly, we should be locking the pwr_lock when we initialise the compressed buffer. Secondly, fixup a couple of places when we should be pulling pointers only under the pwr_lock as they may be affected by operations that take that lock.
Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/wm_adsp.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index d3b1cb15e7f0..4839d195c72a 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -2240,9 +2240,13 @@ int wm_adsp2_event(struct snd_soc_dapm_widget *w, if (ret != 0) goto err;
+ mutex_lock(&dsp->pwr_lock); + if (wm_adsp_fw[dsp->fw].num_caps != 0) ret = wm_adsp_buffer_init(dsp);
+ mutex_unlock(&dsp->pwr_lock); + break;
case SND_SOC_DAPM_PRE_PMD: @@ -2814,12 +2818,15 @@ static int wm_adsp_buffer_update_avail(struct wm_adsp_compr_buf *buf)
int wm_adsp_compr_handle_irq(struct wm_adsp *dsp) { - struct wm_adsp_compr_buf *buf = dsp->buffer; - struct wm_adsp_compr *compr = dsp->compr; + struct wm_adsp_compr_buf *buf; + struct wm_adsp_compr *compr; int ret = 0;
mutex_lock(&dsp->pwr_lock);
+ buf = dsp->buffer; + compr = dsp->compr; + if (!buf) { ret = -ENODEV; goto out; @@ -2879,14 +2886,16 @@ int wm_adsp_compr_pointer(struct snd_compr_stream *stream, struct snd_compr_tstamp *tstamp) { struct wm_adsp_compr *compr = stream->runtime->private_data; - struct wm_adsp_compr_buf *buf = compr->buf; struct wm_adsp *dsp = compr->dsp; + struct wm_adsp_compr_buf *buf; int ret = 0;
adsp_dbg(dsp, "Pointer request\n");
mutex_lock(&dsp->pwr_lock);
+ buf = compr->buf; + if (!compr->buf) { ret = -ENXIO; goto out;