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 43FAFC433F5 for ; Mon, 18 Apr 2022 13:37:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243231AbiDRNkE (ORCPT ); Mon, 18 Apr 2022 09:40:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57260 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243280AbiDRNhd (ORCPT ); Mon, 18 Apr 2022 09:37:33 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BAE4E27B0E; Mon, 18 Apr 2022 05:58:17 -0700 (PDT) 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 E45AD612CF; Mon, 18 Apr 2022 12:58:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D34FCC385A9; Mon, 18 Apr 2022 12:58:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650286696; bh=4QpLtH7S8RdCIQtLmepIpbKl1cszcxf5LaxKnqz6APU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Uz2wBtK2FK5ZLVGdDZrCD5nZonYJEaBbOKJdevg2/qK9EG/qiQxqW/HmSYj0s7AkN 2fz15UKAwuN5el4adDQ29ixaK6FLsZbtpKROZkmHWWCjVuPNIoNCqmTnUoZXBfnAxU PPM1/ceAhsZ0ov//YggbuTRHGsHVFr780wtnE0cM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Arnd Bergmann , Sasha Levin Subject: [PATCH 4.14 176/284] ARM: mmp: Fix failure to remove sram device Date: Mon, 18 Apr 2022 14:12:37 +0200 Message-Id: <20220418121216.744989715@linuxfoundation.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220418121210.689577360@linuxfoundation.org> References: <20220418121210.689577360@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: stable@vger.kernel.org From: Uwe Kleine-König [ Upstream commit 4036b29a146b2749af3bb213b003eb69f3e5ecc4 ] Make sure in .probe() to set driver data before the function is left to make it possible in .remove() to undo the actions done. This fixes a potential memory leak and stops returning an error code in .remove() that is ignored by the driver core anyhow. Signed-off-by: Uwe Kleine-König Reviewed-by: Greg Kroah-Hartman Signed-off-by: Arnd Bergmann Signed-off-by: Sasha Levin --- arch/arm/mach-mmp/sram.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/arch/arm/mach-mmp/sram.c b/arch/arm/mach-mmp/sram.c index bf5e64906e65..a41162dc4af4 100644 --- a/arch/arm/mach-mmp/sram.c +++ b/arch/arm/mach-mmp/sram.c @@ -75,6 +75,8 @@ static int sram_probe(struct platform_device *pdev) if (!info) return -ENOMEM; + platform_set_drvdata(pdev, info); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res == NULL) { dev_err(&pdev->dev, "no memory resource defined\n"); @@ -110,8 +112,6 @@ static int sram_probe(struct platform_device *pdev) list_add(&info->node, &sram_bank_list); mutex_unlock(&sram_lock); - platform_set_drvdata(pdev, info); - dev_info(&pdev->dev, "initialized\n"); return 0; @@ -130,17 +130,19 @@ static int sram_remove(struct platform_device *pdev) struct sram_bank_info *info; info = platform_get_drvdata(pdev); - if (info == NULL) - return -ENODEV; - mutex_lock(&sram_lock); - list_del(&info->node); - mutex_unlock(&sram_lock); + if (info->sram_size) { + mutex_lock(&sram_lock); + list_del(&info->node); + mutex_unlock(&sram_lock); + + gen_pool_destroy(info->gpool); + iounmap(info->sram_virt); + kfree(info->pool_name); + } - gen_pool_destroy(info->gpool); - iounmap(info->sram_virt); - kfree(info->pool_name); kfree(info); + return 0; } -- 2.34.1