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authorYassine Oudjana <y.oudjana@protonmail.com>2022-06-06 18:22:26 +0300
committerMark Brown <broonie@kernel.org>2022-06-24 18:21:43 +0300
commitbe6dd72edb216f20fc80e426ece9fe9b8aabf033 (patch)
tree003c7815da71e71788a9e8ba3081b8c4e5617128 /sound
parent58136d93d4e2c1207a5e4f3044815cd40b1d95fd (diff)
downloadlinux-be6dd72edb216f20fc80e426ece9fe9b8aabf033.tar.xz
ASoC: wcd9335: Remove RX channel from old list before adding it to a new one
Currently in slim_rx_mux_put, an RX channel gets added to a new list even if it is already in one. This can mess up links and make either it, the new list head, or both, get linked to the wrong entries. This can cause an entry to link to itself which in turn ends up making list_for_each_entry in other functions loop infinitely. To avoid issues, always remove the RX channel from any list it's in before adding it to a new list. Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com> Link: https://lore.kernel.org/r/20220606152226.149164-1-y.oudjana@protonmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/codecs/wcd9335.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index 617a36a89dfe..597420679505 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -1289,9 +1289,12 @@ static int slim_rx_mux_put(struct snd_kcontrol *kc,
wcd->rx_port_value[port_id] = ucontrol->value.enumerated.item[0];
+ /* Remove channel from any list it's in before adding it to a new one */
+ list_del_init(&wcd->rx_chs[port_id].list);
+
switch (wcd->rx_port_value[port_id]) {
case 0:
- list_del_init(&wcd->rx_chs[port_id].list);
+ /* Channel already removed from lists. Nothing to do here */
break;
case 1:
list_add_tail(&wcd->rx_chs[port_id].list,