This is a note to let you know that I've just added the patch titled usb: gadget: f_ncm: allow using NCM in SuperSpeed Plus gadgets. to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-gadget-f_ncm-allow-using-ncm-in-superspeed-plus-.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit dd14fb54fcaebe8cd375907da5c6da2e42f8ba0d Author: Lorenzo Colitti <lorenzo@xxxxxxxxxx> Date: Tue Aug 25 14:55:05 2020 +0900 usb: gadget: f_ncm: allow using NCM in SuperSpeed Plus gadgets. [ Upstream commit 7974ecd7d3c0f42a98566f281e44ea8573a2ad88 ] Currently, enabling f_ncm at SuperSpeed Plus speeds results in an oops in config_ep_by_speed because ncm_set_alt passes in NULL ssp_descriptors. Fix this by re-using the SuperSpeed descriptors. This is safe because usb_assign_descriptors calls usb_copy_descriptors. Tested: enabled f_ncm on a dwc3 gadget and 10Gbps link, ran iperf Reviewed-by: Maciej Żenczykowski <maze@xxxxxxxxxx> Signed-off-by: Lorenzo Colitti <lorenzo@xxxxxxxxxx> Signed-off-by: Felipe Balbi <balbi@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c index 09bc917d407d4..e4aa370e86a9e 100644 --- a/drivers/usb/gadget/function/f_ncm.c +++ b/drivers/usb/gadget/function/f_ncm.c @@ -1523,7 +1523,7 @@ static int ncm_bind(struct usb_configuration *c, struct usb_function *f) fs_ncm_notify_desc.bEndpointAddress; status = usb_assign_descriptors(f, ncm_fs_function, ncm_hs_function, - ncm_ss_function, NULL); + ncm_ss_function, ncm_ss_function); if (status) goto fail;