From patchwork Mon Jul 12 06:11:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 474478 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 46BBCC11F8C for ; Mon, 12 Jul 2021 06:28:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 333A560FE3 for ; Mon, 12 Jul 2021 06:28:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234484AbhGLGbb (ORCPT ); Mon, 12 Jul 2021 02:31:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:48092 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235930AbhGLG3j (ORCPT ); Mon, 12 Jul 2021 02:29:39 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 6525E6121F; Mon, 12 Jul 2021 06:26:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626071174; bh=IqQjlhPp88JtlnZtyQJfzcmZZPoxly7FSV8htWXjdhE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0i00iIIp+E887FNkeNSuvBwwsq7Xolt50e29p/sRPvGXQ64it+kdE1pPxcc4e4AhV n1Z+TY4nyP2Vs1zh5zzFcWhN983luZ8Rb0DURxBQacmpITOux7i8qJe8ZujmBYvc3M Y2M+SvY63uSmgN14M/OWlfGsrYkOnSW2AwYPtvlM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joachim Fenkes , Joel Stanley , Sasha Levin Subject: [PATCH 5.4 299/348] fsi/sbefifo: Fix reset timeout Date: Mon, 12 Jul 2021 08:11:23 +0200 Message-Id: <20210712060743.293843699@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210712060659.886176320@linuxfoundation.org> References: <20210712060659.886176320@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Joachim Fenkes [ Upstream commit 9ab1428dfe2c66b51e0b41337cd0164da0ab6080 ] On BMCs with lower timer resolution than 1ms, msleep(1) will take way longer than 1ms, so looping 10k times won't wait for 10s but significantly longer. Fix this by using jiffies like the rest of the code. Fixes: 9f4a8a2d7f9d ("fsi/sbefifo: Add driver for the SBE FIFO") Signed-off-by: Joachim Fenkes Link: https://lore.kernel.org/r/20200724071518.430515-3-joel@jms.id.au Signed-off-by: Joel Stanley Signed-off-by: Sasha Levin --- drivers/fsi/fsi-sbefifo.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c index 655b45c1f6ba..c8ccc99e214f 100644 --- a/drivers/fsi/fsi-sbefifo.c +++ b/drivers/fsi/fsi-sbefifo.c @@ -325,7 +325,8 @@ static int sbefifo_up_write(struct sbefifo *sbefifo, __be32 word) static int sbefifo_request_reset(struct sbefifo *sbefifo) { struct device *dev = &sbefifo->fsi_dev->dev; - u32 status, timeout; + unsigned long end_time; + u32 status; int rc; dev_dbg(dev, "Requesting FIFO reset\n"); @@ -341,7 +342,8 @@ static int sbefifo_request_reset(struct sbefifo *sbefifo) } /* Wait for it to complete */ - for (timeout = 0; timeout < SBEFIFO_RESET_TIMEOUT; timeout++) { + end_time = jiffies + msecs_to_jiffies(SBEFIFO_RESET_TIMEOUT); + while (!time_after(jiffies, end_time)) { rc = sbefifo_regr(sbefifo, SBEFIFO_UP | SBEFIFO_STS, &status); if (rc) { dev_err(dev, "Failed to read UP fifo status during reset" @@ -355,7 +357,7 @@ static int sbefifo_request_reset(struct sbefifo *sbefifo) return 0; } - msleep(1); + cond_resched(); } dev_err(dev, "FIFO reset timed out\n");