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 0510CC4321E for ; Mon, 5 Dec 2022 19:37:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234300AbiLEThO (ORCPT ); Mon, 5 Dec 2022 14:37:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234116AbiLETgq (ORCPT ); Mon, 5 Dec 2022 14:36:46 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E60D927177 for ; Mon, 5 Dec 2022 11:33:47 -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 7EED861315 for ; Mon, 5 Dec 2022 19:33:47 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8AC2AC433C1; Mon, 5 Dec 2022 19:33:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670268826; bh=7byHlP5ufhy761TVqmwuLgFBxPP3Cgr0AZESwIy16cc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KNh+xQTDYDUYDV9eB0JhpESScdBmTK9BeVUI1PicOwcl2cX6vW+He2sNX1TktXE7o AYtzLFPPnDzaqqrjfQBeNGfkkft4Jk/Uzsf4qbU6F6ccpKQ8YHyhCVwZBLNHHKkVEj J6flWdXy/8IFVdLOjXYi9nVq6V0s0LM3Y6SN8HTs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Srinivas Kandagatla , Nicolas Saenz Julienne , Wei Yongjun , Yang Yingliang , Sasha Levin Subject: [PATCH 5.15 026/120] nvmem: rmem: Fix return value check in rmem_read() Date: Mon, 5 Dec 2022 20:09:26 +0100 Message-Id: <20221205190807.355487488@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221205190806.528972574@linuxfoundation.org> References: <20221205190806.528972574@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: Wei Yongjun [ Upstream commit 58e92c4a496b27156020a59a98c7f4a92c2b1533 ] In case of error, the function memremap() returns NULL pointer not ERR_PTR(). The IS_ERR() test in the return value check should be replaced with NULL test. Fixes: 5a3fa75a4d9c ("nvmem: Add driver to expose reserved memory as nvmem") Cc: Srinivas Kandagatla Cc: Nicolas Saenz Julienne Signed-off-by: Wei Yongjun Acked-by: Nicolas Saenz Julienne Signed-off-by: Yang Yingliang Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20221118063840.6357-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/nvmem/rmem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/nvmem/rmem.c b/drivers/nvmem/rmem.c index b11c3c974b3d..80cb187f1481 100644 --- a/drivers/nvmem/rmem.c +++ b/drivers/nvmem/rmem.c @@ -37,9 +37,9 @@ static int rmem_read(void *context, unsigned int offset, * but as of Dec 2020 this isn't possible on arm64. */ addr = memremap(priv->mem->base, available, MEMREMAP_WB); - if (IS_ERR(addr)) { + if (!addr) { dev_err(priv->dev, "Failed to remap memory region\n"); - return PTR_ERR(addr); + return -ENOMEM; } count = memory_read_from_buffer(val, bytes, &off, addr, available); -- 2.35.1