Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1ebab292 authored by Mayank Rana's avatar Mayank Rana Committed by Hemant Kumar
Browse files

USB: rndis: Honor dl_max_packet_size value sent by host 



This change starts using dl_max_packet_size value sent by host
as part of USB RNDIS init message communication. Using default
dl_max_packet_size value results into low throughput with more
data loss on host side as host side RNDIS can't support
de-aggregation (applicable for Linux Host RNDIS driver) or it
ignores received more data then host side RNDIS can handle. To
use fine tune dl_max_packet_size for better throughput, driver
selects minimum value between host supported dl_max_packet_size
and default size (i.e. 9216 bytes as RNDIS IN aggregation size).

Change-Id: I00c81bc905a032867c537536b01bf32584c37e63
Signed-off-by: default avatarMayank Rana <mrana@codeaurora.org>
parent 3484b6bc

drivers/usb/gadget/function/rndis.c

+11 −2
Original line number Diff line number Diff line
@@ -806,8 +806,17 @@ int rndis_msg_parser(struct rndis_params *params, u8 *buf) 
	/* For USB: responses may take up to 10 seconds */

	switch (MsgType) {

	case RNDIS_MSG_INIT:

		pr_debug("%s: RNDIS_MSG_INIT\n",

			__func__);

		pr_debug("%s: RNDIS_MSG_INIT\n", __func__);

		tmp++; /* to get RequestID */

		params->host_rndis_major_ver = get_unaligned_le32(tmp++);

		params->host_rndis_minor_ver = get_unaligned_le32(tmp++);

		params->dl_max_xfer_size = get_unaligned_le32(tmp++);



		pr_debug("%s(): RNDIS Host Major:%d Minor:%d version\n",

					__func__, params->host_rndis_major_ver,

					params->host_rndis_minor_ver);

		pr_debug("%s(): DL Max Transfer size:%x\n",

				__func__, params->dl_max_xfer_size);

		params->state = RNDIS_INITIALIZED;

		return rndis_init_response(params, (rndis_init_msg_type *)buf);

drivers/usb/gadget/function/rndis.h

+3 −0
Original line number Diff line number Diff line
@@ -171,6 +171,9 @@ typedef struct rndis_params { 


	u32			vendorID;

	u8			max_pkt_per_xfer;

	u32			host_rndis_major_ver;

	u32			host_rndis_minor_ver;

	u32			dl_max_xfer_size;

	const char		*vendorDescr;

	u8			pkt_alignment_factor;

	void			(*resp_avail)(void *v);