From patchwork Thu Sep 10 08:21:42 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: 297671 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=ham 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 386C5C43461 for ; Thu, 10 Sep 2020 08:31:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2F87214F1 for ; Thu, 10 Sep 2020 08:31:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="ImSM/DOG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730410AbgIJIbA (ORCPT ); Thu, 10 Sep 2020 04:31:00 -0400 Received: from Mailgw01.mediatek.com ([1.203.163.78]:22256 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1730386AbgIJIYe (ORCPT ); Thu, 10 Sep 2020 04:24:34 -0400 X-UUID: 8a453c210c5846adb62cae5a4badafcf-20200910 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:Message-ID:Date:Subject:CC:To:From; bh=n+pceR4RMgmAMEAt4bZLKvLzwP+bC0iCUPc31NQ9+9s=; b=ImSM/DOG0HuougE7y2Iw0kLbkvBSDrLp0w3PiAWAaJoHLFYJOcHJ9+IM8EzFtOp6xq9o21XQhgXgfW4Fyq5DyuKYFcf4ugNrigbKdeBMBPhMJXnm030ui//nkStYY/dgz8udDldPiuCDwDK6Y0EFQ3jN2tnBXmrhkVP6oAUm1wQ=; X-UUID: 8a453c210c5846adb62cae5a4badafcf-20200910 Received: from mtkcas32.mediatek.inc [(172.27.4.253)] by mailgw01.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1609855164; Thu, 10 Sep 2020 16:23:59 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by MTKMBS31N2.mediatek.inc (172.27.4.87) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 10 Sep 2020 16:23:58 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 10 Sep 2020 16:23:56 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Mathias Nyman , Felipe Balbi , Matthias Brugger , Douglas Anderson , Chunfeng Yun , Daniel Thompson , "Eric W. Biederman" , Lee Jones , Sumit Garg , Jann Horn , Arnd Bergmann , Jason Yan , Chuhong Yuan , "Gustavo A. R. Silva" , Ben Dooks , Saurav Girepunje , , , , , Lu Baolu , Mathias Nyman Subject: [PATCH RESEND v3 01/11] usb: early: convert to readl_poll_timeout_atomic() Date: Thu, 10 Sep 2020 16:21:42 +0800 Message-ID: <1599726112-4439-1-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty MIME-Version: 1.0 X-TM-SNTS-SMTP: 3CEDF1C9E1989338AB07B01DC590B9649CEE54B7EB8B0190A82F837BF91D34932000:8 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: Lu Baolu Cc: Mathias Nyman Signed-off-by: Chunfeng Yun --- v2~v3: no changes --- drivers/usb/early/xhci-dbc.c | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) -- 1.9.1 diff --git a/drivers/usb/early/xhci-dbc.c b/drivers/usb/early/xhci-dbc.c index c050776..be4ecba 100644 --- a/drivers/usb/early/xhci-dbc.c +++ b/drivers/usb/early/xhci-dbc.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -135,16 +136,9 @@ static int handshake(void __iomem *ptr, u32 mask, u32 done, int wait, int delay) { u32 result; - do { - result = readl(ptr); - result &= mask; - if (result == done) - return 0; - udelay(delay); - wait -= delay; - } while (wait > 0); - - return -ETIMEDOUT; + return readl_poll_timeout_atomic(ptr, result, + ((result & mask) == done), + delay, wait); } static void __init xdbc_bios_handoff(void)