From patchwork Wed Aug 19 12:41:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 258824 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, MIME_BASE64_TEXT, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2670BC433E1 for ; Wed, 19 Aug 2020 12:44:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0457720738 for ; Wed, 19 Aug 2020 12:44:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="BdbnORcN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728445AbgHSMoH (ORCPT ); Wed, 19 Aug 2020 08:44:07 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:60353 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728290AbgHSMnD (ORCPT ); Wed, 19 Aug 2020 08:43:03 -0400 X-UUID: 7ce18b06918c40bc94240a3df908dba3-20200819 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=Dpta4H1SRQk7Li++WBp2aI6qhPf7vOedFdtzx5lB+FM=; b=BdbnORcN+z0BJUp0H5lM60jMuurtL4cB15OO/QYJ12tJhKS9/6FznXN2GGk3eSF3XIDtkJj3kFFUXRHxKqu5i9N4ANiSlXvwgB5Q73pHMFPehfMyc+iWU8lXpYbNWjNrZ7NCSqEpMHrCbh4WoI6p+2fIsbij+Thh2RL9zM+zO+w=; X-UUID: 7ce18b06918c40bc94240a3df908dba3-20200819 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 1470467389; Wed, 19 Aug 2020 20:42:55 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 19 Aug 2020 20:42:54 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 19 Aug 2020 20:42:52 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Felipe Balbi , Matthias Brugger , Chunfeng Yun , , , , , Lee Jones , Alan Stern Subject: [PATCH 10/10] usb: udc: net2280: convert to readl_poll_timeout_atomic() Date: Wed, 19 Aug 2020 20:41:05 +0800 Message-ID: <1597840865-26631-10-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1597840865-26631-1-git-send-email-chunfeng.yun@mediatek.com> References: <1597840865-26631-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: E0EC442A6D048C3678D031DC199AB4D56B601BF5917F13DC48DE34E7762CD3F22000:8 X-MTK: N Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Use readl_poll_timeout_atomic() to simplify code Cc: Alan Stern Cc: Felipe Balbi Signed-off-by: Chunfeng Yun --- drivers/usb/gadget/udc/net2280.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) -- 1.9.1 diff --git a/drivers/usb/gadget/udc/net2280.c b/drivers/usb/gadget/udc/net2280.c index 7530bd9..f1a21f4 100644 --- a/drivers/usb/gadget/udc/net2280.c +++ b/drivers/usb/gadget/udc/net2280.c @@ -52,6 +52,7 @@ #include #include #include +#include #include #include @@ -360,18 +361,16 @@ static inline void enable_pciirqenb(struct net2280_ep *ep) static int handshake(u32 __iomem *ptr, u32 mask, u32 done, int usec) { u32 result; + int ret; - do { - result = readl(ptr); - if (result == ~(u32)0) /* "device unplugged" */ - return -ENODEV; - result &= mask; - if (result == done) - return 0; - udelay(1); - usec--; - } while (usec > 0); - return -ETIMEDOUT; + ret = readl_poll_timeout_atomic(ptr, result, + ((result & mask) == done || + result == U32_MAX), + 1, usec); + if (result == U32_MAX) /* device unplugged */ + return -ENODEV; + + return ret; } static const struct usb_ep_ops net2280_ep_ops;