From: xerox_lin Date: Mon, 18 Aug 2014 13:54:23 +0000 (+0800) Subject: USB: rndis: Free the rndis response queue during REMOTE_NDIS_RESET_MSG X-Git-Tag: firefly_0821_release~2958^2~378 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c996cdd384f0afeb5cc0c110913391582d1d8fc0;p=firefly-linux-kernel-4.4.55.git USB: rndis: Free the rndis response queue during REMOTE_NDIS_RESET_MSG 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 Signed-off-by: Xerox Lin --- diff --git a/drivers/usb/gadget/function/rndis.c b/drivers/usb/gadget/function/rndis.c index 70d3917cc003..27163e816be4 100644 --- a/drivers/usb/gadget/function/rndis.c +++ b/drivers/usb/gadget/function/rndis.c @@ -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;