Commit a176b1a2 authored by Lorenzo Colitti's avatar Lorenzo Colitti Committed by Felipe Balbi
Browse files

usb: gadget: f_ncm: set SuperSpeed bulk descriptor bMaxBurst to 15 



This improves performance on fast connections. When directly
connecting to a Linux laptop running 5.6, single-stream iperf3
goes from ~1.7Gbps to ~2.3Gbps out, and from ~620Mbps to ~720Mbps
in.

Reviewed-by: default avatarMaciej Żenczykowski <maze@google.com>
Signed-off-by: default avatarLorenzo Colitti <lorenzo@google.com>
Signed-off-by: default avatarFelipe Balbi <balbi@kernel.org>
parent 986499b1

drivers/usb/gadget/function/f_ncm.c

+1 −1
Original line number Diff line number Diff line
@@ -378,7 +378,7 @@ static struct usb_ss_ep_comp_descriptor ss_ncm_bulk_comp_desc = { 
	.bDescriptorType =	USB_DT_SS_ENDPOINT_COMP,



	/* the following 2 values can be tweaked if necessary */

	/* .bMaxBurst =		0, */

	.bMaxBurst =		15,

	/* .bmAttributes =	0, */

};