From patchwork Wed May 12 14:44:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 438616 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=-19.4 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=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 DED3FC433B4 for ; Wed, 12 May 2021 15:21:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A344A61C83 for ; Wed, 12 May 2021 15:21:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232409AbhELPWq (ORCPT ); Wed, 12 May 2021 11:22:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:58726 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233383AbhELPU4 (ORCPT ); Wed, 12 May 2021 11:20:56 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id E89EB61490; Wed, 12 May 2021 15:08:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620832124; bh=w8ThypbtQWX26mEdMFWbwl0qLBFoHfiAFNpcf35XHsk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eoMUQQ7PNBwUugtc0eJAc44RSnoiAQnXVM+lkSVYNJ+BhYie0RDkPjKD5ltdrXeAx LqrFkYl92Ewm1xKARKQkCJ3FKW4YByZkeMMI1hsjHz4seRA4kKJ5fWdDSTz0l+bMva kOi/M/1WnRJvnnlm5bWd+8SHnQBYtyUlz2MPaAGU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, David Bauer , Miquel Raynal , Sasha Levin Subject: [PATCH 5.10 152/530] mtd: dont lock when recursively deleting partitions Date: Wed, 12 May 2021 16:44:22 +0200 Message-Id: <20210512144824.841955924@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144819.664462530@linuxfoundation.org> References: <20210512144819.664462530@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: David Bauer [ Upstream commit cb4543054c5c4fd33df960b41d7b483ebca8e786 ] When recursively deleting partitions, don't acquire the masters partition lock twice. Otherwise the process ends up in a deadlocked state. Fixes: 46b5889cc2c5 ("mtd: implement proper partition handling") Signed-off-by: David Bauer Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210217195320.893253-1-mail@david-bauer.net Signed-off-by: Sasha Levin --- drivers/mtd/mtdpart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c index c3575b686f79..95d47422bbf2 100644 --- a/drivers/mtd/mtdpart.c +++ b/drivers/mtd/mtdpart.c @@ -331,7 +331,7 @@ static int __del_mtd_partitions(struct mtd_info *mtd) list_for_each_entry_safe(child, next, &mtd->partitions, part.node) { if (mtd_has_partitions(child)) - del_mtd_partitions(child); + __del_mtd_partitions(child); pr_info("Deleting %s MTD partition\n", child->name); ret = del_mtd_device(child);