diff options
Diffstat (limited to 'sound/usb/pcm.c')
| -rw-r--r-- | sound/usb/pcm.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index b470404a5376..d45d1d7e6664 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; @@ -304,7 +307,7 @@ int snd_usb_audioformat_set_sync_ep(struct snd_usb_audio *chip, * Generic sync EP handling */ - if (altsd->bNumEndpoints < 2) + if (fmt->ep_idx > 0 || altsd->bNumEndpoints < 2) return 0; is_playback = !(get_endpoint(alts, 0)->bEndpointAddress & USB_DIR_IN); @@ -1266,7 +1269,7 @@ static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, unsigned int wrap = subs->buffer_bytes; u8 *dst = urb->transfer_buffer; u8 *src = runtime->dma_area; - u8 marker[] = { 0x05, 0xfa }; + static const u8 marker[] = { 0x05, 0xfa }; unsigned int queued = 0; /* |