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

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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: Maciej Żenczykowski <maze@google.com>
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Lorenzo Colitti 2020-08-25 14:55:04 +09:00 committed by Felipe Balbi
parent 986499b156
commit a176b1a2a7
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/gadget/function/f_ncm.c
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@ -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, */
};