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 X-Spam-Level: X-Spam-Status: No, score=-18.8 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, 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 07F0DC43381 for ; Mon, 1 Mar 2021 20:29:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B822864ECF for ; Mon, 1 Mar 2021 20:29:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243345AbhCAU2I (ORCPT ); Mon, 1 Mar 2021 15:28:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:37782 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237038AbhCARGj (ORCPT ); Mon, 1 Mar 2021 12:06:39 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1B6E164FFE; Mon, 1 Mar 2021 16:40:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1614616801; bh=o8CLskPD1LDP/xRiRYWR+6METXCll3RqbXoDtbfYEE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qPhwu+CBcw+jIggQ8fB8kpUflvDWWtprxmpNNy4p4Xi0oEzDS/2rp/Ktw1sXh8OLX tzwy03oTLQNjHStahZth/SpwU8m5NbbGy0jCs4vujsvgTLc8DT/2xi4j4FOxm+VPTa gJlnIfR+YPlk+yTYWMdhCC0z0b0+3g5+xAt+XE5M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jan Henrik Weinstock , Herbert Xu , Sasha Levin Subject: [PATCH 4.19 101/247] hwrng: timeriomem - Fix cooldown period calculation Date: Mon, 1 Mar 2021 17:12:01 +0100 Message-Id: <20210301161036.624360386@linuxfoundation.org> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210301161031.684018251@linuxfoundation.org> References: <20210301161031.684018251@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jan Henrik Weinstock [ Upstream commit e145f5565dc48ccaf4cb50b7cfc48777bed8c100 ] Ensure cooldown period tolerance of 1% is actually accounted for. Fixes: ca3bff70ab32 ("hwrng: timeriomem - Improve performance...") Signed-off-by: Jan Henrik Weinstock Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/char/hw_random/timeriomem-rng.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/hw_random/timeriomem-rng.c b/drivers/char/hw_random/timeriomem-rng.c index f615684028af7..ba01f24db6db0 100644 --- a/drivers/char/hw_random/timeriomem-rng.c +++ b/drivers/char/hw_random/timeriomem-rng.c @@ -72,7 +72,7 @@ static int timeriomem_rng_read(struct hwrng *hwrng, void *data, */ if (retval > 0) usleep_range(period_us, - period_us + min(1, period_us / 100)); + period_us + max(1, period_us / 100)); *(u32 *)data = readl(priv->io_base); retval += sizeof(u32); -- 2.27.0