From patchwork Thu Dec 9 03:14:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12695434 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7349BC433F5 for ; Thu, 9 Dec 2021 03:20:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=FD+OCFkEBX4bxLPA96UioVGhtGDj1CZU5+E86flWvEw=; b=VwDBIXnAsi8TFc nDPLfwTi2rJrNYh3kFhAgWCMxi9d1O37H2CZqTDJrH0Lw0mFvg+oNy4biP/NqxE8ZcnqmeJ1wu4AN vOj4MKUt+rOgw9Z5Gw+Hp1yBD20JZrwcU9UhnlOHbMN8o5t3959vs+oXmpAy8bJTvhZTFCMA135Ph o2Qtv9dYONyCf0yuODIgyFGDPZYo3dg17qQFgGwh/EWioEVr6vBMhygQZO6I8uO1zrwVFH6xSWqgo FlQRSNPpun4dZ/k4rylCrEf4GKmskLg3bFpjsKWWWyaAGcdVBs+EPMnE+d6CgNANZn688av8EQBOA S/vo+6UqRNrie0lNFdEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mv9xW-00Eoxc-9p; Thu, 09 Dec 2021 03:19:02 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mv9xS-00Eowy-HM; Thu, 09 Dec 2021 03:18:59 +0000 X-UUID: 77c206b1c4004dcbb02932ef2ae9c031-20211208 X-UUID: 77c206b1c4004dcbb02932ef2ae9c031-20211208 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 2096936; Wed, 08 Dec 2021 20:18:55 -0700 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 8 Dec 2021 19:14:23 -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 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211208_191858_619680_D779EFD7 X-CRM114-Status: GOOD ( 11.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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;