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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0658CC4167B for ; Wed, 28 Dec 2022 16:29:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234733AbiL1Q3W (ORCPT ); Wed, 28 Dec 2022 11:29:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234228AbiL1Q3C (ORCPT ); Wed, 28 Dec 2022 11:29:02 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BDE331AA17 for ; Wed, 28 Dec 2022 08:25:17 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4832361577 for ; Wed, 28 Dec 2022 16:25:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 56001C433EF; Wed, 28 Dec 2022 16:25:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672244716; bh=FLk0k+bo2rCESWWBatgB7EdgAxL+VwLLBfO09Y9EYOo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=y2qZ8YC2VYxvXQeIhp3VbJ+veXfiY/qWYzoA5C2XiGZ4ajhjeg+kWHyN6MarlQGZV EPi95P7t7QNYAAuHLxz8woMnAGDcmu+TlYTtRsk37DJqfyzvy9zxWzUf32an40lpz4 MsQmMACWHXAAFWLvjmNj92cFp7x7IOTnjIXj65e0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Fabrice Gasnier , William Breathitt Gray , Sasha Levin Subject: [PATCH 6.1 0724/1146] counter: stm32-lptimer-cnt: fix the check on arr and cmp registers update Date: Wed, 28 Dec 2022 15:37:43 +0100 Message-Id: <20221228144349.810608615@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20221228144330.180012208@linuxfoundation.org> References: <20221228144330.180012208@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Fabrice Gasnier [ Upstream commit fd5ac974fc25feed084c2d1599d0dddb4e0556bc ] The ARR (auto reload register) and CMP (compare) registers are successively written. The status bits to check the update of these registers are polled together with regmap_read_poll_timeout(). The condition to end the loop may become true, even if one of the register isn't correctly updated. So ensure both status bits are set before clearing them. Fixes: d8958824cf07 ("iio: counter: Add support for STM32 LPTimer") Signed-off-by: Fabrice Gasnier Link: https://lore.kernel.org/r/20221123133609.465614-1-fabrice.gasnier@foss.st.com/ Signed-off-by: William Breathitt Gray Signed-off-by: Sasha Levin --- drivers/counter/stm32-lptimer-cnt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/counter/stm32-lptimer-cnt.c b/drivers/counter/stm32-lptimer-cnt.c index d6b80b6dfc28..8439755559b2 100644 --- a/drivers/counter/stm32-lptimer-cnt.c +++ b/drivers/counter/stm32-lptimer-cnt.c @@ -69,7 +69,7 @@ static int stm32_lptim_set_enable_state(struct stm32_lptim_cnt *priv, /* ensure CMP & ARR registers are properly written */ ret = regmap_read_poll_timeout(priv->regmap, STM32_LPTIM_ISR, val, - (val & STM32_LPTIM_CMPOK_ARROK), + (val & STM32_LPTIM_CMPOK_ARROK) == STM32_LPTIM_CMPOK_ARROK, 100, 1000); if (ret) return ret; -- 2.35.1