diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/usb/usbaudio.c | 26 |
1 files changed, 8 insertions, 18 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index a62d1313da1..a703d96bfcb 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -311,27 +311,18 @@ static int prepare_capture_urb(snd_usb_substream_t *subs, struct urb *urb) { int i, offs; - unsigned long flags; snd_urb_ctx_t *ctx = (snd_urb_ctx_t *)urb->context; offs = 0; urb->dev = ctx->subs->dev; /* we need to set this at each time */ - urb->number_of_packets = 0; - spin_lock_irqsave(&subs->lock, flags); for (i = 0; i < ctx->packets; i++) { urb->iso_frame_desc[i].offset = offs; urb->iso_frame_desc[i].length = subs->curpacksize; offs += subs->curpacksize; - urb->number_of_packets++; - subs->transfer_sched += subs->curframesize; - if (subs->transfer_sched >= runtime->period_size) { - subs->transfer_sched -= runtime->period_size; - break; - } } - spin_unlock_irqrestore(&subs->lock, flags); urb->transfer_buffer = ctx->buf; urb->transfer_buffer_length = offs; + urb->number_of_packets = ctx->packets; #if 0 // for check if (! urb->bandwidth) { int bustime; @@ -359,6 +350,7 @@ static int retire_capture_urb(snd_usb_substream_t *subs, unsigned char *cp; int i; unsigned int stride, len, oldptr; + int period_elapsed = 0; stride = runtime->frame_bits >> 3; @@ -378,6 +370,10 @@ static int retire_capture_urb(snd_usb_substream_t *subs, if (subs->hwptr_done >= runtime->buffer_size) subs->hwptr_done -= runtime->buffer_size; subs->transfer_done += len; + if (subs->transfer_done >= runtime->period_size) { + subs->transfer_done -= runtime->period_size; + period_elapsed = 1; + } spin_unlock_irqrestore(&subs->lock, flags); /* copy a data chunk */ if (oldptr + len > runtime->buffer_size) { @@ -388,15 +384,9 @@ static int retire_capture_urb(snd_usb_substream_t *subs, } else { memcpy(runtime->dma_area + oldptr * stride, cp, len * stride); } - /* update the pointer, call callback if necessary */ - spin_lock_irqsave(&subs->lock, flags); - if (subs->transfer_done >= runtime->period_size) { - subs->transfer_done -= runtime->period_size; - spin_unlock_irqrestore(&subs->lock, flags); - snd_pcm_period_elapsed(subs->pcm_substream); - } else - spin_unlock_irqrestore(&subs->lock, flags); } + if (period_elapsed) + snd_pcm_period_elapsed(subs->pcm_substream); return 0; } |