[PATCH 4.19 15/86] usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS

[Greg Kroah-Hartman]

From: Pavankumar Kondeti <quic_pkondeti@xxxxxxxxxxx>

commit 904edf8aeb459697129be5fde847e2a502f41fd9 upstream.

Currently when gadget enumerates in super speed plus, the isoc
endpoint request buffer size is not calculated correctly. Fix
this by checking the gadget speed against USB_SPEED_SUPER_PLUS
and update the request buffer size.

Fixes: 90c4d05780d4 ("usb: fix various gadgets null ptr deref on 10gbps cabling.")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Pavankumar Kondeti <quic_pkondeti@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/1642820602-20619-1-git-send-email-quic_pkondeti@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/function/f_sourcesink.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/gadget/function/f_sourcesink.c
+++ b/drivers/usb/gadget/function/f_sourcesink.c
@@ -583,6 +583,7 @@ static int source_sink_start_ep(struct f
 
 	if (is_iso) {
 		switch (speed) {
+		case USB_SPEED_SUPER_PLUS:
 		case USB_SPEED_SUPER:
 			size = ss->isoc_maxpacket *
 					(ss->isoc_mult + 1) *