1 files changed, 1 insertions, 1 deletions

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 97dd17655104..03ce971e0027 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -1126,7 +1126,7 @@ static int parse_audio_feature_unit(struct mixer_build *state, int unitid, void
         } else {
                 struct uac2_feature_unit_descriptor *ftr = _ftr;
                 csize = 4;
-                channels = (hdr->bLength - 6) / 4;
+                channels = (hdr->bLength - 6) / 4 - 1;
                 bmaControls = ftr->bmaControls;
         }