This is a note to let you know that I've just added the patch titled
ASoC: wm_adsp: Fix missing locking in wm_adsp_[read|write]_ctl()
to the 6.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
asoc-wm_adsp-fix-missing-locking-in-wm_adsp_-read-wr.patch
and it can be found in the queue-6.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f8433d7d283b0386223becd96349413633445624
Author: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Date: Wed Sep 13 17:02:50 2023 +0100
ASoC: wm_adsp: Fix missing locking in wm_adsp_[read|write]_ctl()
[ Upstream commit 781118bc2fc1026c8285f83ea7ecab07071a09c4 ]
wm_adsp_read_ctl() and wm_adsp_write_ctl() must hold the cs_dsp pwr_lock
mutex when calling cs_dsp_coeff_read_ctrl() and cs_dsp_coeff_write_ctrl().
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230913160250.3700346-1-rf@xxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 5a89abfe87846..8c20ff6808941 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -687,7 +687,10 @@ int wm_adsp_write_ctl(struct wm_adsp *dsp, const char *name, int type,
struct wm_coeff_ctl *ctl;
int ret;
+ mutex_lock(&dsp->cs_dsp.pwr_lock);
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
+ mutex_unlock(&dsp->cs_dsp.pwr_lock);
+
if (ret < 0)
return ret;
@@ -703,8 +706,14 @@ EXPORT_SYMBOL_GPL(wm_adsp_write_ctl);
int wm_adsp_read_ctl(struct wm_adsp *dsp, const char *name, int type,
unsigned int alg, void *buf, size_t len)
{
- return cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg),
- 0, buf, len);
+ int ret;
+
+ mutex_lock(&dsp->cs_dsp.pwr_lock);
+ ret = cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(&dsp->cs_dsp, name, type, alg),
+ 0, buf, len);
+ mutex_unlock(&dsp->cs_dsp.pwr_lock);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(wm_adsp_read_ctl);
