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authorStefan Binding2022-10-11 15:35:49 +0100
committerTakashi Iwai2022-10-12 08:02:46 +0200
commit06f3a0a758c4246dc644e22fb33f85c6e5f92af6 (patch)
tree53534dea4109535db4d68dcb7785c9624b5709c2 /sound/pci
parent49b0dea1eb5e0fd5e498a2c2ce50d2e036494072 (diff)
ALSA: hda: hda_cs_dsp_ctl: Ensure pwr_lock is held before reading/writing controls
These apis require the pwr_lock to be held. Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com> Link: https://lore.kernel.org/r/20221011143552.621792-3-sbinding@opensource.cirrus.com Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci')
-rw-r--r--sound/pci/hda/hda_cs_dsp_ctl.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/sound/pci/hda/hda_cs_dsp_ctl.c b/sound/pci/hda/hda_cs_dsp_ctl.c
index 41d3e8fd289d..75fb69185817 100644
--- a/sound/pci/hda/hda_cs_dsp_ctl.c
+++ b/sound/pci/hda/hda_cs_dsp_ctl.c
@@ -199,11 +199,14 @@ EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_control_remove, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_write_ctl(struct cs_dsp *dsp, const char *name, int type,
unsigned int alg, const void *buf, size_t len)
{
- struct cs_dsp_coeff_ctl *cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
+ struct cs_dsp_coeff_ctl *cs_ctl;
struct hda_cs_dsp_coeff_ctl *ctl;
int ret;
+ mutex_lock(&dsp->pwr_lock);
+ cs_ctl = cs_dsp_get_ctl(dsp, name, type, alg);
ret = cs_dsp_coeff_write_ctrl(cs_ctl, 0, buf, len);
+ mutex_unlock(&dsp->pwr_lock);
if (ret)
return ret;
@@ -221,7 +224,13 @@ EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_write_ctl, SND_HDA_CS_DSP_CONTROLS);
int hda_cs_dsp_read_ctl(struct cs_dsp *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, name, type, alg), 0, buf, len);
+ int ret;
+
+ mutex_lock(&dsp->pwr_lock);
+ ret = cs_dsp_coeff_read_ctrl(cs_dsp_get_ctl(dsp, name, type, alg), 0, buf, len);
+ mutex_unlock(&dsp->pwr_lock);
+
+ return ret;
}
EXPORT_SYMBOL_NS_GPL(hda_cs_dsp_read_ctl, SND_HDA_CS_DSP_CONTROLS);