evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

USB: rndis: Free the rndis response queue during REMOTE_NDIS_RESET_MSG

Browse source 
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
blocks any more Rndis transfers.

Hence free the rndis response queue as a part of this soft-reset so that
the current response for REMOTE_NDIS_RESET_MSG is sent properly during the
response command.

Change-Id: I8eff3849db452fe01b7d1fe4140ef1f1ad3f4fd4
Signed-off-by: Rajkumar Raghupathy <raghup@codeaurora.org>
Signed-off-by: Xerox Lin <xerox_lin@htc.com>
This commit is contained in:
xerox_lin 2014-08-18 21:54:23 +08:00 • committed by John Stultz
parent 62ed32043a
commit c996cdd384
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/usb/gadget/function/rndis.c
View file

@ -681,6 +681,13 @@ static int rndis_reset_response(struct rndis_params *params,
rndis_reset_cmplt_type *resp;
rndis_resp_t *r;
u32 length;
u8 *xbuf;
/* drain the response queue */
while ((xbuf = rndis_get_next_response(configNr, &length)))
rndis_free_response(configNr, xbuf);
r = rndis_add_response(params, sizeof(rndis_reset_cmplt_type));
if (!r)
return -ENOMEM;