Using usb_fill_int_urb() helps to find code which initializes an
URB. A grep for members of the struct (like ->complete) reveal lots
of other things, too.
data_ep_set_params() additionally sets urb->transfer_buffer_length which
was not the case earlier.
data_ep_set_params() and data_ep_set_params() ensure that syncinterval is
within the allowed range on HS/SS. The interval value seems to come from
snd_usb_parse_datainterval() which is bInterval - 1 and only in the rage 1 … 4.
So in order to keep the magic wokring I pass datainterval + 1.
Cc: Jaroslav Kysela
Cc: Takashi Iwai
Signed-off-by: Sebastian Andrzej Siewior
---
sound/usb/endpoint.c | 24 ++--
1 file changed, 10 insertions(+), 14 deletions(-)
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index c90607ebe155..bbc02db5b417 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -772,6 +772,8 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep,
/* allocate and initialize data urbs */
for (i = 0; i < ep->nurbs; i++) {
struct snd_urb_ctx *u = >urb[i];
+ void *buf;
+
u->index = i;
u->ep = ep;
u->packets = urb_packs;
@@ -783,16 +785,13 @@ static int data_ep_set_params(struct snd_usb_endpoint *ep,
if (!u->urb)
goto out_of_memory;
- u->urb->transfer_buffer =
- usb_alloc_coherent(ep->chip->dev, u->buffer_size,
- GFP_KERNEL, >urb->transfer_dma);
- if (!u->urb->transfer_buffer)
+ buf = usb_alloc_coherent(ep->chip->dev, u->buffer_size,
+GFP_KERNEL, >urb->transfer_dma);
+ if (!buf)
goto out_of_memory;
- u->urb->pipe = ep->pipe;
+ usb_fill_int_urb(u->urb, NULL, ep->pipe, buf, u->buffer_size,
+snd_complete_urb, u, ep->datainterval + 1);
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;
INIT_LIST_HEAD(>ready_list);
}
@@ -823,15 +822,12 @@ static int sync_ep_set_params(struct snd_usb_endpoint *ep)
u->urb = usb_alloc_urb(1, GFP_KERNEL);
if (!u->urb)
goto out_of_memory;
- u->urb->transfer_buffer = ep->syncbuf + i * 4;
+ usb_fill_int_urb(u->urb, NULL, ep->pipe, ep->syncbuf + i * 4, 4,
+snd_complete_urb, u, ep->syncinterval + 1);
+
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_NO_TRANSFER_DMA_MAP;
u->urb->number_of_packets = 1;
- u->urb->interval = 1 << ep->syncinterval;
- u->urb->context = u;
- u->urb->complete = snd_complete_urb;
}
ep->nurbs = SYNC_URBS;
--
2.17.1
--
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