From: Srinivas Kandagatla srinivas.kandagatla@linaro.org
commit c5c1546a654f613e291a7c5d6f3660fc1eb6d0c7 upstream.
Mixer controls have the channel id in mixer->reg, which is not same as port id. port id should be derived from chan_info array. So fix this. Without this, its possible that we could corrupt struct wcd938x_sdw_priv by accessing port_map array out of range with channel id instead of port id.
Fixes: e8ba1e05bdc0 ("ASoC: codecs: wcd938x: add basic controls") Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Link: https://lore.kernel.org/r/20220126113549.8853-2-srinivas.kandagatla@linaro.o... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- sound/soc/codecs/wcd938x.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-)
--- a/sound/soc/codecs/wcd938x.c +++ b/sound/soc/codecs/wcd938x.c @@ -1432,14 +1432,10 @@ static int wcd938x_sdw_connect_port(stru return 0; }
-static int wcd938x_connect_port(struct wcd938x_sdw_priv *wcd, u8 ch_id, u8 enable) +static int wcd938x_connect_port(struct wcd938x_sdw_priv *wcd, u8 port_num, u8 ch_id, u8 enable) { - u8 port_num; - - port_num = wcd->ch_info[ch_id].port_num; - return wcd938x_sdw_connect_port(&wcd->ch_info[ch_id], - &wcd->port_config[port_num], + &wcd->port_config[port_num - 1], enable); }
@@ -2593,6 +2589,7 @@ static int wcd938x_set_compander(struct struct wcd938x_priv *wcd938x = snd_soc_component_get_drvdata(component); struct wcd938x_sdw_priv *wcd; int value = ucontrol->value.integer.value[0]; + int portidx; struct soc_mixer_control *mc; bool hphr;
@@ -2606,10 +2603,12 @@ static int wcd938x_set_compander(struct else wcd938x->comp1_enable = value;
+ portidx = wcd->ch_info[mc->reg].port_num; + if (value) - wcd938x_connect_port(wcd, mc->reg, true); + wcd938x_connect_port(wcd, portidx, mc->reg, true); else - wcd938x_connect_port(wcd, mc->reg, false); + wcd938x_connect_port(wcd, portidx, mc->reg, false);
return 0; } @@ -2882,9 +2881,11 @@ static int wcd938x_get_swr_port(struct s struct wcd938x_sdw_priv *wcd; struct soc_mixer_control *mixer = (struct soc_mixer_control *)kcontrol->private_value; int dai_id = mixer->shift; - int portidx = mixer->reg; + int portidx, ch_idx = mixer->reg; +
wcd = wcd938x->sdw_priv[dai_id]; + portidx = wcd->ch_info[ch_idx].port_num;
ucontrol->value.integer.value[0] = wcd->port_enable[portidx];
@@ -2899,12 +2900,14 @@ static int wcd938x_set_swr_port(struct s struct wcd938x_sdw_priv *wcd; struct soc_mixer_control *mixer = (struct soc_mixer_control *)kcontrol->private_value; - int portidx = mixer->reg; + int ch_idx = mixer->reg; + int portidx; int dai_id = mixer->shift; bool enable;
wcd = wcd938x->sdw_priv[dai_id];
+ portidx = wcd->ch_info[ch_idx].port_num; if (ucontrol->value.integer.value[0]) enable = true; else @@ -2912,7 +2915,7 @@ static int wcd938x_set_swr_port(struct s
wcd->port_enable[portidx] = enable;
- wcd938x_connect_port(wcd, portidx, enable); + wcd938x_connect_port(wcd, portidx, ch_idx, enable);
return 0;