The branch main has been updated by christos: URL: https://cgit.FreeBSD.org/src/commit/?id=fc9dc848239652ec1e4135adb4833a5f002cef0f
commit fc9dc848239652ec1e4135adb4833a5f002cef0f Author: Christos Margiolis <[email protected]> AuthorDate: 2026-05-28 09:31:52 +0000 Commit: Christos Margiolis <[email protected]> CommitDate: 2026-05-28 13:02:01 +0000 snd_uaudio: Lock usbd_transfer_start() in uaudio_mixer_ctl_set() This section would be previously locked by sound(4)'s mixer lock (see e87654db5a09 ("snd_uaudio: Stop using mixer_get_lock()")), but snd_uaudio(4) no longer uses it. This particular code path was missed during testing, because my sound card does not reach it. Fixes: 9a00e0b8ca56 ("snd_uaudio: Do not use snd_mixer->lock as mixer_lock") Reported by: netchild Tested by: netchild Sponsored by: The FreeBSD Foundation MFC after: 6 days --- sys/dev/sound/usb/uaudio.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c index 27d5009da4fa..eedd52774b70 100644 --- a/sys/dev/sound/usb/uaudio.c +++ b/sys/dev/sound/usb/uaudio.c @@ -5386,8 +5386,8 @@ uaudio_mixer_bsd2value(struct uaudio_mixer_node *mc, int val) } static void -uaudio_mixer_ctl_set(struct uaudio_softc *sc, struct uaudio_mixer_node *mc, - uint8_t chan, int val) +uaudio_mixer_ctl_set(struct uaudio_softc *sc, unsigned index, + struct uaudio_mixer_node *mc, uint8_t chan, int val) { val = uaudio_mixer_bsd2value(mc, val); @@ -5396,7 +5396,9 @@ uaudio_mixer_ctl_set(struct uaudio_softc *sc, struct uaudio_mixer_node *mc, /* start the transfer, if not already started */ + mtx_lock(&sc->sc_child[index].mixer_lock); usbd_transfer_start(sc->sc_mixer_xfer[0]); + mtx_unlock(&sc->sc_child[index].mixer_lock); } static void @@ -5482,7 +5484,7 @@ uaudio_mixer_set(struct uaudio_softc *sc, struct snd_mixer *m, for (mc = sc->sc_mixer_root; mc != NULL; mc = mc->next) { if (mc->ctl == type) { for (chan = 0; chan < mc->nchan; chan++) { - uaudio_mixer_ctl_set(sc, mc, chan, + uaudio_mixer_ctl_set(sc, index, mc, chan, chan == 0 ? left : right); } } @@ -5523,7 +5525,7 @@ uaudio_mixer_setrecsrc(struct uaudio_softc *sc, struct snd_mixer *m, uint32_t sr for (i = mc->minval; (i > 0) && (i <= mc->maxval); i++) { if (temp != (1U << mc->slctrtype[i - 1])) continue; - uaudio_mixer_ctl_set(sc, mc, 0, i); + uaudio_mixer_ctl_set(sc, index, mc, 0, i); break; } }
