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authorTakashi Iwai <tiwai@suse.de>2022-06-06 18:09:10 +0200
committerTakashi Iwai <tiwai@suse.de>2022-06-06 18:11:23 +0200
commite0469d6581aecb0e34e2ec64f39f88e6985cc52f (patch)
tree50fe56f7b180a4d0551b31668ca074dddfd65977 /sound/usb/pcm.c
parentALSA: usb-audio: Skip generic sync EP parse for secondary EP (diff)
downloadlinux-e0469d6581aecb0e34e2ec64f39f88e6985cc52f.tar.xz
linux-e0469d6581aecb0e34e2ec64f39f88e6985cc52f.zip
ALSA: usb-audio: Set up (implicit) sync for Saffire 6
Focusrite Saffire 6 has fixed audioformat quirks with multiple endpoints assigned to a single altsetting. Unfortunately the generic parser couldn't detect the sync endpoint correctly as the implicit sync due to the missing EP attribute bits. In the former kernels, it used to work somehow casually, but it's been broken for a while after the large code change in 5.11. This patch cures the regression by the following: - Allow the static quirk table to provide the sync EP information; we just need to fill the fields and let the generic parser skipping parsing if sync_ep is already set. - Add the sync endpoint information to the entry for Saffire 6. Fixes: 7b0efea4baf0 ("ALSA: usb-audio: Add missing ep_idx in fixed EP quirks") Reported-and-tested-by: André Kapelrud <a.kapelrud@gmail.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20220606160910.6926-3-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/pcm.c')
-rw-r--r--sound/usb/pcm.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index b0369df53910..e692ae04436a 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -291,6 +291,9 @@ int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip,
bool is_playback;
int err;
+ if (fmt->sync_ep)
+ return 0; /* already set up */
+
alts = snd_usb_get_host_interface(chip, fmt->iface, fmt->altsetting);
if (!alts)
return 0;