diff options
| author | Xerox Lin <xerox_lin@htc.com> | 2016-06-29 14:34:21 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-03 06:23:24 +0200 |
| commit | 13e84cdbd790a9a567dcb6f206f755e20162ff43 (patch) | |
| tree | 8ebbfe60fd4f79d7f85ecd2373e81460ddf8f4b1 /drivers/usb/gadget | |
| parent | 0752035a776efeaf615e9ebc0d94dafd1f209898 (diff) | |
usb: gadget: rndis: free response queue during REMOTE_NDIS_RESET_MSG
[ Upstream commit 207707d8fd48ebc977fb2b2794004a020e1ee08e ]
When rndis data transfer is in progress, some Windows7 Host PC is not
sending the GET_ENCAPSULATED_RESPONSE command for receiving the response
for the previous SEND_ENCAPSULATED_COMMAND processed.
The rndis function driver appends each response for the
SEND_ENCAPSULATED_COMMAND in a queue. As the above process got corrupted,
the Host sends a REMOTE_NDIS_RESET_MSG command to do a soft-reset.
As the rndis response queue is not freed, the previous response is sent
as a part of this REMOTE_NDIS_RESET_MSG's reset response and the Host
block any more Rndis transfers.
Hence free the rndis response queue as a part of this soft-reset so that
the correct response for REMOTE_NDIS_RESET_MSG is sent properly during the
response command.
Signed-off-by: Rajkumar Raghupathy <raghup@codeaurora.org>
Signed-off-by: Xerox Lin <xerox_lin@htc.com>
[AmitP: Cherry-picked this patch and folded other relevant
fixes from Android common kernel android-4.4]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/usb/gadget')
| -rw-r--r-- | drivers/usb/gadget/function/rndis.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c index 70d3917cc003..2582db38d6a6 100644 --- a/drivers/usb/gadget/function/rndis.c +++ b/drivers/usb/gadget/function/rndis.c @@ -680,6 +680,12 @@ static int rndis_reset_response(struct rndis_params *params, { rndis_reset_cmplt_type *resp; rndis_resp_t *r; + u8 *xbuf; + u32 length; + + /* drain the response queue */ + while ((xbuf = rndis_get_next_response(params, &length))) + rndis_free_response(params, xbuf); r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type)); if (!r) |