Hello!

On 6/20/2018 12:55 AM, Sebastian Andrzej Siewior wrote:

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()

   These 2 are the same function?

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.

   Working.

Cc: Jaroslav Kysela <pe...@perex.cz>
Cc: Takashi Iwai <ti...@suse.com>
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
[...]

MBR, Sergei
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