From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
stable inclusion from stable-v5.10.85 commit 62e4dc5e130eab3ef556a33bc2fa888aa44710e0 bugzilla: 186032 https://gitee.com/openeuler/kernel/issues/I4QVI4
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 4739d88ad8e1900f809f8a5c98f3c1b65bf76220 upstream.
msm_routing_put_audio_mixer() can return incorrect value in various scenarios.
scenario 1: amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1 amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 0
return value is 0 instead of 1 eventhough value was changed
scenario 2: amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1 amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 1
return value is 1 instead of 0 eventhough the value was not changed
scenario 3: amixer cset iface=MIXER,name='SLIMBUS_0_RX Audio Mixer MultiMedia1' 0 return value is 1 instead of 0 eventhough the value was not changed
Fix this by adding checks, so that change notifications are sent correctly.
Fixes: e3a33673e845 ("ASoC: qdsp6: q6routing: Add q6routing driver") Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Link: https://lore.kernel.org/r/20211130163110.5628-1-srinivas.kandagatla@linaro.o... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- sound/soc/qcom/qdsp6/q6routing.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/sound/soc/qcom/qdsp6/q6routing.c b/sound/soc/qcom/qdsp6/q6routing.c index 934b3f282bcc..2026fa590292 100644 --- a/sound/soc/qcom/qdsp6/q6routing.c +++ b/sound/soc/qcom/qdsp6/q6routing.c @@ -488,14 +488,16 @@ static int msm_routing_put_audio_mixer(struct snd_kcontrol *kcontrol, struct session_data *session = &data->sessions[session_id];
if (ucontrol->value.integer.value[0]) { + if (session->port_id == be_id) + return 0; + session->port_id = be_id; snd_soc_dapm_mixer_update_power(dapm, kcontrol, 1, update); } else { - if (session->port_id == be_id) { - session->port_id = -1; + if (session->port_id == -1 || session->port_id != be_id) return 0; - }
+ session->port_id = -1; snd_soc_dapm_mixer_update_power(dapm, kcontrol, 0, update); }