The patch
ASoC: wm_adsp: Add locking to DSP firmware controls
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 168d10e74c4efd945a37adeb134f096505e62b49 Mon Sep 17 00:00:00 2001
From: Charles Keepax ckeepax@opensource.wolfsonmicro.com Date: Tue, 8 Dec 2015 16:08:27 +0000 Subject: [PATCH] ASoC: wm_adsp: Add locking to DSP firmware controls
Locking is currently missing from the DSP firmware controls, which can lead to some race conditions if the controls are accessed as the DSP powers up or down. This patch adds them to the new power lock.
Signed-off-by: Charles Keepax ckeepax@opensource.wolfsonmicro.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/wm_adsp.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-)
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c index 3a314f2..b083642 100644 --- a/sound/soc/codecs/wm_adsp.c +++ b/sound/soc/codecs/wm_adsp.c @@ -597,14 +597,19 @@ static int wm_coeff_put(struct snd_kcontrol *kctl, { struct wm_coeff_ctl *ctl = (struct wm_coeff_ctl *)kctl->private_value; char *p = ucontrol->value.bytes.data; + int ret = 0; + + mutex_lock(&ctl->dsp->pwr_lock);
memcpy(ctl->cache, p, ctl->len);
ctl->set = 1; - if (!ctl->enabled) - return 0; + if (ctl->enabled) + ret = wm_coeff_write_control(ctl, p, ctl->len);
- return wm_coeff_write_control(ctl, p, ctl->len); + mutex_unlock(&ctl->dsp->pwr_lock); + + return ret; }
static int wm_coeff_read_control(struct wm_coeff_ctl *ctl, @@ -651,17 +656,22 @@ static int wm_coeff_get(struct snd_kcontrol *kctl, { struct wm_coeff_ctl *ctl = (struct wm_coeff_ctl *)kctl->private_value; char *p = ucontrol->value.bytes.data; + int ret = 0; + + mutex_lock(&ctl->dsp->pwr_lock);
if (ctl->flags & WMFW_CTL_FLAG_VOLATILE) { if (ctl->enabled) - return wm_coeff_read_control(ctl, p, ctl->len); + ret = wm_coeff_read_control(ctl, p, ctl->len); else - return -EPERM; + ret = -EPERM; + } else { + memcpy(p, ctl->cache, ctl->len); }
- memcpy(p, ctl->cache, ctl->len); + mutex_unlock(&ctl->dsp->pwr_lock);
- return 0; + return ret; }
struct wmfw_ctl_work {