On 09/22/2015 06:56 PM, Krzysztof Opasiak wrote:
Since:
commit e0857ce58e8658657f5f12fe25272b93cfeb16aa
("usb: gadget: loopback: don't queue requests to bogus endpoints")
Loopback function is not realy working as that commit removed
all looping back logic. After that commit ep-out works like
/dev/null and ep-in works like /dev/zero.
This commit fix this issue by allocating set of out requests
and set of in requests but each out req shares buffer with
one in req:
out_req->buf ---> buf <--- in_req.buf
out_req->context <---> in_req.context
The completion routine simply enqueue the suitable req in
an oposite direction.
Cc: <stable@xxxxxxxxxxxxxxx> # 3.18+
Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
---
Changes since v1:
- add missing usb_ep_free_request() in complete() callback
After hour of using this I have faced some problem with memory feeing. I
will look for it and send update shortly.
--
Krzysztof Opasiak
Samsung R&D Institute Poland
Samsung Electronics
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