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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 67EA5C282C4 for ; Wed, 13 Feb 2019 02:57:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 26ADB21B1A for ; Wed, 13 Feb 2019 02:57:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550026620; bh=QBIuctLtVlS9aMbkxcGI8DEbrjCG/na/F621DTyBIPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tEyMX2SbBw4vEUJsAuYrCOVXcb1oFSb4uz/GoYcXXXQEeaDAnKD/QAubvyp2JyTHO T8Sgok2yyKOg8wUBb46iy3I36LSAL3eUJTsdVKpww9QVWeC1io/qchPOksqMRVp2w7 6P0UdTGcnlytW5+Tbz6F64m6TVRySNTK6WtWza74= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390131AbfBMC47 (ORCPT ); Tue, 12 Feb 2019 21:56:59 -0500 Received: from mail.kernel.org ([198.145.29.99]:40786 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388250AbfBMChO (ORCPT ); Tue, 12 Feb 2019 21:37:14 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2E421206B6; Wed, 13 Feb 2019 02:37:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550025433; bh=QBIuctLtVlS9aMbkxcGI8DEbrjCG/na/F621DTyBIPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WLRnCbOCCNC6sN63QsS/pc4SGq8YtsXovQoZHWCeB+Ud1IAFYbCyBZk+XTAqCZtbb SQJTNLI+ldmDt51QDdtfAs3E/5BlcYlV2Spgqr6Nix3zmn0IBNPKUI7NV8kMMgkbW2 xBnLdWqjHH3hi4TaekkB0jmSHS6hTLtbsvPomyo0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dan Carpenter , Lee Jones , Sasha Levin Subject: [PATCH AUTOSEL 4.19 10/83] mfd: ab8500-core: Return zero in get_register_interruptible() Date: Tue, 12 Feb 2019 21:35:48 -0500 Message-Id: <20190213023701.20286-10-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190213023701.20286-1-sashal@kernel.org> References: <20190213023701.20286-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 10628e3ecf544fa2e4e24f8e112d95c37884dc98 ] This function is supposed to return zero on success or negative error codes on error. Unfortunately, there is a bug so it sometimes returns non-zero, positive numbers on success. I noticed this bug during review and I can't test it. It does appear that the return is sometimes propogated back to _regmap_read() where all non-zero returns are treated as failure so this may affect run time. Fixes: 47c1697508f2 ("mfd: Align ab8500 with the abx500 interface") Signed-off-by: Dan Carpenter Reviewed-by: Linus Walleij Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/ab8500-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c index 30d09d177171..11ab17f64c64 100644 --- a/drivers/mfd/ab8500-core.c +++ b/drivers/mfd/ab8500-core.c @@ -261,7 +261,7 @@ static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, mutex_unlock(&ab8500->lock); dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); - return ret; + return (ret < 0) ? ret : 0; } static int ab8500_get_register(struct device *dev, u8 bank, -- 2.19.1