From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 83667C433EF for ; Thu, 9 Dec 2021 03:14:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231373AbhLIDSF (ORCPT ); Wed, 8 Dec 2021 22:18:05 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:37154 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S231363AbhLIDSC (ORCPT ); Wed, 8 Dec 2021 22:18:02 -0500 X-UUID: 63ff790bee984ac6b799a6b80d21c9d2-20211209 X-UUID: 63ff790bee984ac6b799a6b80d21c9d2-20211209 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 435789986; Thu, 09 Dec 2021 11:14:27 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 9 Dec 2021 11:14:26 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 9 Dec 2021 11:14:25 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Chunfeng Yun , Matthias Brugger , , , , , Eddie Hung , Yuwen Ng Subject: [PATCH 1/3] usb: mtu3: fix interval value for intr and isoc Date: Thu, 9 Dec 2021 11:14:22 +0800 Message-ID: <20211209031424.17842-1-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Use the Interval value from isoc/intr endpoint descriptor, no need minus one. But the original code doesn't cause transfer error for normal cases, due to the interval is less than the host request. Signed-off-by: Chunfeng Yun --- drivers/usb/mtu3/mtu3_gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/mtu3/mtu3_gadget.c b/drivers/usb/mtu3/mtu3_gadget.c index a9a65b4bbfed..c51be015345b 100644 --- a/drivers/usb/mtu3/mtu3_gadget.c +++ b/drivers/usb/mtu3/mtu3_gadget.c @@ -77,7 +77,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep) if (usb_endpoint_xfer_int(desc) || usb_endpoint_xfer_isoc(desc)) { interval = desc->bInterval; - interval = clamp_val(interval, 1, 16) - 1; + interval = clamp_val(interval, 1, 16); if (usb_endpoint_xfer_isoc(desc) && comp_desc) mult = comp_desc->bmAttributes; } @@ -89,7 +89,7 @@ static int mtu3_ep_enable(struct mtu3_ep *mep) if (usb_endpoint_xfer_isoc(desc) || usb_endpoint_xfer_int(desc)) { interval = desc->bInterval; - interval = clamp_val(interval, 1, 16) - 1; + interval = clamp_val(interval, 1, 16); mult = usb_endpoint_maxp_mult(desc) - 1; } break; -- 2.18.0