From 904edf8aeb459697129be5fde847e2a502f41fd9 Mon Sep 17 00:00:00 2001
From: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Date: Sat, 22 Jan 2022 08:33:22 +0530
Subject: [PATCH] usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS
Git-commit: 904edf8aeb459697129be5fde847e2a502f41fd9
Patch-mainline: v5.17-rc2
References: git-fixes

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@vger.kernel.org>
Signed-off-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Link: https://lore.kernel.org/r/1642820602-20619-1-git-send-email-quic_pkondeti@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/usb/gadget/function/f_sourcesink.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/function/f_sourcesink.c b/drivers/usb/gadget/function/f_sourcesink.c
index 1abf08e5164a..6803cd60cc6d 100644
--- a/drivers/usb/gadget/function/f_sourcesink.c
+++ b/drivers/usb/gadget/function/f_sourcesink.c
@@ -584,6 +584,7 @@ static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in,
 
 	if (is_iso) {
 		switch (speed) {
+		case USB_SPEED_SUPER_PLUS:
 		case USB_SPEED_SUPER:
 			size = ss->isoc_maxpacket *
 					(ss->isoc_mult + 1) *
-- 
2.31.1