3.8-stable review patch. If anyone has any objections, please let me know.
------------------
From: Clemens Ladisch <clemens@xxxxxxxxxx>
commit c75c5ab575af7db707689cdbb5a5c458e9a034bb upstream.
The recent changes in the USB API ("implement new semantics for
URB_ISO_ASAP") made the former meaning of the URB_ISO_ASAP flag the
default, and changed this flag to mean that URBs can be delayed.
This is not the behaviour wanted by any of the audio drivers because
it leads to discontinuous playback with very small period sizes.
Therefore, our URBs need to be submitted without this flag.
Reported-by: Joe Rayhawk <jrayhawk@xxxxxxxxxxxxxxxx>
Signed-off-by: Clemens Ladisch <clemens@xxxxxxxxxx>
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/usb/6fire/pcm.c | 1 -
sound/usb/caiaq/audio.c | 3 ---
sound/usb/endpoint.c | 5 ++---
sound/usb/misc/ua101.c | 3 +--
sound/usb/usx2y/usb_stream.c | 1 -
sound/usb/usx2y/usbusx2yaudio.c | 1 -
sound/usb/usx2y/usx2yhwdeppcm.c | 1 -
7 files changed, 3 insertions(+), 12 deletions(-)
--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -575,7 +575,6 @@ static void usb6fire_pcm_init_urb(struct
urb->instance.pipe = in ? usb_rcvisocpipe(chip->dev, ep)
: usb_sndisocpipe(chip->dev, ep);
urb->instance.interval = 1;
- urb->instance.transfer_flags = URB_ISO_ASAP;
urb->instance.complete = handler;
urb->instance.context = urb;
urb->instance.number_of_packets = PCM_N_PACKETS_PER_URB;
--- a/sound/usb/caiaq/audio.c
+++ b/sound/usb/caiaq/audio.c
@@ -670,7 +670,6 @@ static void read_completed(struct urb *u
if (send_it) {
out->number_of_packets = outframe;
- out->transfer_flags = URB_ISO_ASAP;
usb_submit_urb(out, GFP_ATOMIC);
} else {
struct snd_usb_caiaq_cb_info *oinfo = out->context;
@@ -686,7 +685,6 @@ requeue:
}
urb->number_of_packets = FRAMES_PER_URB;
- urb->transfer_flags = URB_ISO_ASAP;
usb_submit_urb(urb, GFP_ATOMIC);
}
@@ -751,7 +749,6 @@ static struct urb **alloc_urbs(struct sn
* BYTES_PER_FRAME;
urbs[i]->context = &dev->data_cb_info[i];
urbs[i]->interval = 1;
- urbs[i]->transfer_flags = URB_ISO_ASAP;
urbs[i]->number_of_packets = FRAMES_PER_URB;
urbs[i]->complete = (dir == SNDRV_PCM_STREAM_CAPTURE) ?
read_completed : write_completed;
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -677,7 +677,7 @@ static int data_ep_set_params(struct snd
if (!u->urb->transfer_buffer)
goto out_of_memory;
u->urb->pipe = ep->pipe;
- u->urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
+ u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
u->urb->interval = 1 << ep->datainterval;
u->urb->context = u;
u->urb->complete = snd_complete_urb;
@@ -716,8 +716,7 @@ static int sync_ep_set_params(struct snd
u->urb->transfer_dma = ep->sync_dma + i * 4;
u->urb->transfer_buffer_length = 4;
u->urb->pipe = ep->pipe;
- u->urb->transfer_flags = URB_ISO_ASAP |
- URB_NO_TRANSFER_DMA_MAP;
+ u->urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
u->urb->number_of_packets = 1;
u->urb->interval = 1 << ep->syncinterval;
u->urb->context = u;
--- a/sound/usb/misc/ua101.c
+++ b/sound/usb/misc/ua101.c
@@ -1120,8 +1120,7 @@ static int alloc_stream_urbs(struct ua10
usb_init_urb(&urb->urb);
urb->urb.dev = ua->dev;
urb->urb.pipe = stream->usb_pipe;
- urb->urb.transfer_flags = URB_ISO_ASAP |
- URB_NO_TRANSFER_DMA_MAP;
+ urb->urb.transfer_flags = URB_NO_TRANSFER_DMA_MAP;
urb->urb.transfer_buffer = addr;
urb->urb.transfer_dma = dma;
urb->urb.transfer_buffer_length = max_packet_size;
--- a/sound/usb/usx2y/usb_stream.c
+++ b/sound/usb/usx2y/usb_stream.c
@@ -69,7 +69,6 @@ static void init_pipe_urbs(struct usb_st
++u, transfer += transfer_length) {
struct urb *urb = urbs[u];
struct usb_iso_packet_descriptor *desc;
- urb->transfer_flags = URB_ISO_ASAP;
urb->transfer_buffer = transfer;
urb->dev = dev;
urb->pipe = pipe;
--- a/sound/usb/usx2y/usbusx2yaudio.c
+++ b/sound/usb/usx2y/usbusx2yaudio.c
@@ -503,7 +503,6 @@ static int usX2Y_urbs_start(struct snd_u
if (0 == i)
atomic_set(&subs->state, state_STARTING3);
urb->dev = usX2Y->dev;
- urb->transfer_flags = URB_ISO_ASAP;
for (pack = 0; pack < nr_of_packs(); pack++) {
urb->iso_frame_desc[pack].offset = subs->maxpacksize * pack;
urb->iso_frame_desc[pack].length = subs->maxpacksize;
--- a/sound/usb/usx2y/usx2yhwdeppcm.c
+++ b/sound/usb/usx2y/usx2yhwdeppcm.c
@@ -443,7 +443,6 @@ static int usX2Y_usbpcm_urbs_start(struc
if (0 == u)
atomic_set(&subs->state, state_STARTING3);
urb->dev = usX2Y->dev;
- urb->transfer_flags = URB_ISO_ASAP;
for (pack = 0; pack < nr_of_packs(); pack++) {
urb->iso_frame_desc[pack].offset = subs->maxpacksize * (pack + u * nr_of_packs());
urb->iso_frame_desc[pack].length = subs->maxpacksize;
--
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