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[2620:137:e000::1:20]) by mx.google.com with ESMTP id ku6-20020a170903288600b001a2513b8e14si1848546plb.84.2023.06.20.06.50.01; Tue, 20 Jun 2023 06:50:15 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=L1JIytbx; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232978AbjFTNXH (ORCPT + 99 others); Tue, 20 Jun 2023 09:23:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232968AbjFTNWv (ORCPT ); Tue, 20 Jun 2023 09:22:51 -0400 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CAAE1BCF for ; Tue, 20 Jun 2023 06:22:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687267323; x=1718803323; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=//6nDkfKtxwUrmAE9sDBlISnk9pJuZNcILsoeTfza6o=; b=L1JIytbxqmULPx02hdQL86sRarCl4xhRKRu4Jziql6p1uisi3fRzAG+k zRUH2LX86C74TLbXNudQ5Z0zh89rW+V2MbIk7xKkjGA4xOraBaQiEEzEx mYnuBOzbYo6i9g2yMuqd63q3bgVtIgDVQ9afOL3v5RXgKMUQdauXykdsG MP3L56yUqS7Rr64iHpVA5wESCkDUOeRmM1URgP2Tw+0K7vPUjquArWTlD T9cZDRQc0wUGU+tSQJDB7qBtJ7mQEyMJmyue/TWFLAK9ewgcYPoYRlbRn 2Cjhyy3e35/WR/CQyfvyRNefAjdX/RtFecFtexyI5T+fUYjGMA7JiqyqJ Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="349588269" X-IronPort-AV: E=Sophos;i="6.00,257,1681196400"; d="scan'208";a="349588269" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2023 06:20:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10747"; a="691426914" X-IronPort-AV: E=Sophos;i="6.00,257,1681196400"; d="scan'208";a="691426914" Received: from sannilnx-dsk.jer.intel.com ([10.12.231.107]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 20 Jun 2023 06:19:58 -0700 From: Alexander Usyskin To: Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Tomas Winkler , Alexander Usyskin , Vitaly Lubart , Andy Shevchenko Subject: [PATCH 0/2] mtd: prepare for dynamically removed devices Date: Tue, 20 Jun 2023 16:19:03 +0300 Message-Id: <20230620131905.648089-1-alexander.usyskin@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1769229794972894885?= X-GMAIL-MSGID: =?utf-8?q?1769229794972894885?= Prepare mtd subsystem for devices that can be dynamically removed, like memory on PCIE card. Use refcount to prevent crashes when underlying device removed unexpectedly and reshuffle __get and __put functions to allow underlying device to clean it memory according to refcount. Alexander Usyskin (1): mtd: call external _get and _put in right order Tomas Winkler (1): mtd: use refcount to prevent corruption drivers/mtd/mtdcore.c | 86 ++++++++++++++++++++++------------------- drivers/mtd/mtdcore.h | 1 + drivers/mtd/mtdpart.c | 14 ++++--- include/linux/mtd/mtd.h | 2 +- 4 files changed, 56 insertions(+), 47 deletions(-)