From patchwork Fri Jan 29 14:50:51 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxim Levitsky X-Patchwork-Id: 43917 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id B2D3CB7D11 for ; Sat, 30 Jan 2010 01:53:18 +1100 (EST) Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NasC4-00014T-HD; Fri, 29 Jan 2010 14:51:32 +0000 Received: from mail-bw0-f212.google.com ([209.85.218.212]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NasBu-0000zj-Ma for linux-mtd@lists.infradead.org; Fri, 29 Jan 2010 14:51:28 +0000 Received: by bwz4 with SMTP id 4so1893128bwz.2 for ; Fri, 29 Jan 2010 06:51:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:cc:subject:date :message-id:x-mailer:in-reply-to:references; bh=x3sLfn20405fhORJ1cSgynMToLAyKUGupwmr0TW7+lU=; b=nBp8E+9oNjQks1Aw+aBtRcxMTvJENpBuhCG84eTbUPy7KnkZKMOJ3czXLJDlELnhi0 06vNLnk+NbhPAqPV11Ds4Ptv3cn9w7mcudcBAEgZMTQccttDvqjGdmnpQWjVHTbGPqw9 wnIbKYrLh3VBKxJZ5t8gofKXhPWcB3PDtGEBk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; b=KijLCwO/st4emSq4JoILRgwRMj8bnbJ5uSFBx0ers/kiSs9G6ypdSLIUx1rAjSMfjq mvb804KOMXDGW1HeretGE+Wb0iNLxZYzoVfXCDjFYGk7+vw/qCepsVe0zHU0zjYvEgVH r0YoidbjADJPGwMBTmdMHsOaJ2yZ57aqE0ObE= Received: by 10.204.35.75 with SMTP id o11mr624030bkd.15.1264776681830; Fri, 29 Jan 2010 06:51:21 -0800 (PST) Received: from localhost.localdomain (IGLD-84-229-248-49.inter.net.il [84.229.248.49]) by mx.google.com with ESMTPS id 16sm937528bwz.3.2010.01.29.06.51.20 (version=SSLv3 cipher=RC4-MD5); Fri, 29 Jan 2010 06:51:21 -0800 (PST) From: Maxim Levitsky To: linux-mtd Subject: [PATCH 04/16] blktrans: don't free mtd_blktrans_dev, core will do that for you Date: Fri, 29 Jan 2010 16:50:51 +0200 Message-Id: <1264776663-7042-5-git-send-email-maximlevitsky@gmail.com> X-Mailer: git-send-email 1.6.3.3 In-Reply-To: <1264776663-7042-1-git-send-email-maximlevitsky@gmail.com> References: <1264776663-7042-1-git-send-email-maximlevitsky@gmail.com> X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20100129_095123_012552_D7B62A8C X-CRM114-Status: GOOD ( 17.81 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.2.5 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- _SUMMARY_ Cc: Maxim Levitsky X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org We need that structure till last user exits, and that might be years after mtd device disappered. Signed-off-by: Maxim Levitsky --- drivers/mtd/ftl.c | 1 - drivers/mtd/inftlcore.c | 1 - drivers/mtd/mtd_blkdevs.c | 13 +++++++++++++ drivers/mtd/mtdblock.c | 1 - drivers/mtd/mtdblock_ro.c | 1 - drivers/mtd/nftlcore.c | 1 - drivers/mtd/rfd_ftl.c | 1 - drivers/mtd/ssfdc.c | 1 - include/linux/mtd/blktrans.h | 1 + 9 files changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/mtd/ftl.c b/drivers/mtd/ftl.c index e56d6b4..62da9eb 100644 --- a/drivers/mtd/ftl.c +++ b/drivers/mtd/ftl.c @@ -1082,7 +1082,6 @@ static void ftl_remove_dev(struct mtd_blktrans_dev *dev) { del_mtd_blktrans_dev(dev); ftl_freepart((partition_t *)dev); - kfree(dev); } static struct mtd_blktrans_ops ftl_tr = { diff --git a/drivers/mtd/inftlcore.c b/drivers/mtd/inftlcore.c index 8aca552..015a7fe 100755 --- a/drivers/mtd/inftlcore.c +++ b/drivers/mtd/inftlcore.c @@ -139,7 +139,6 @@ static void inftl_remove_dev(struct mtd_blktrans_dev *dev) kfree(inftl->PUtable); kfree(inftl->VUtable); - kfree(inftl); } /* diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c index 966398b..9e118cf 100644 --- a/drivers/mtd/mtd_blkdevs.c +++ b/drivers/mtd/mtd_blkdevs.c @@ -131,6 +131,9 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode) if (dev->open++) goto out; + if (dev->deleted) + goto out; + if (!try_module_get(tr->owner)) goto out_tr; @@ -169,6 +172,14 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode) module_put(tr->owner); } + /* Free the private data */ + if (dev->deleted) { + module_put(tr->owner); + mutex_unlock(&dev->lock); + kfree(dev); + return 0; + } + return ret; } @@ -338,6 +349,8 @@ int del_mtd_blktrans_dev(struct mtd_blktrans_dev *old) /* stop new requests to arrive */ del_gendisk(old->disk); + old->deleted = 1; + /* Stop the thread */ kthread_stop(old->thread); diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c index 9f41b1a..d8322cc 100644 --- a/drivers/mtd/mtdblock.c +++ b/drivers/mtd/mtdblock.c @@ -368,7 +368,6 @@ static void mtdblock_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) static void mtdblock_remove_dev(struct mtd_blktrans_dev *dev) { del_mtd_blktrans_dev(dev); - kfree(dev); } static struct mtd_blktrans_ops mtdblock_tr = { diff --git a/drivers/mtd/mtdblock_ro.c b/drivers/mtd/mtdblock_ro.c index 852165f..54ff288 100644 --- a/drivers/mtd/mtdblock_ro.c +++ b/drivers/mtd/mtdblock_ro.c @@ -49,7 +49,6 @@ static void mtdblock_add_mtd(struct mtd_blktrans_ops *tr, struct mtd_info *mtd) static void mtdblock_remove_dev(struct mtd_blktrans_dev *dev) { del_mtd_blktrans_dev(dev); - kfree(dev); } static struct mtd_blktrans_ops mtdblock_tr = { diff --git a/drivers/mtd/nftlcore.c b/drivers/mtd/nftlcore.c index 1002e18..a4578bf 100644 --- a/drivers/mtd/nftlcore.c +++ b/drivers/mtd/nftlcore.c @@ -126,7 +126,6 @@ static void nftl_remove_dev(struct mtd_blktrans_dev *dev) del_mtd_blktrans_dev(dev); kfree(nftl->ReplUnitTable); kfree(nftl->EUNtable); - kfree(nftl); } /* diff --git a/drivers/mtd/rfd_ftl.c b/drivers/mtd/rfd_ftl.c index d2aa9c4..63b83c0 100644 --- a/drivers/mtd/rfd_ftl.c +++ b/drivers/mtd/rfd_ftl.c @@ -817,7 +817,6 @@ static void rfd_ftl_remove_dev(struct mtd_blktrans_dev *dev) vfree(part->sector_map); kfree(part->header_cache); kfree(part->blocks); - kfree(part); } static struct mtd_blktrans_ops rfd_ftl_tr = { diff --git a/drivers/mtd/ssfdc.c b/drivers/mtd/ssfdc.c index 3f67e00..81c4ecd 100644 --- a/drivers/mtd/ssfdc.c +++ b/drivers/mtd/ssfdc.c @@ -375,7 +375,6 @@ static void ssfdcr_remove_dev(struct mtd_blktrans_dev *dev) del_mtd_blktrans_dev(dev); kfree(ssfdc->logic_block_map); - kfree(ssfdc); } static int ssfdcr_readsect(struct mtd_blktrans_dev *dev, diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h index 507f7b2..e276aca 100644 --- a/include/linux/mtd/blktrans.h +++ b/include/linux/mtd/blktrans.h @@ -24,6 +24,7 @@ struct mtd_blktrans_dev { int devnum; unsigned long size; int readonly; + int deleted; int open; struct gendisk *disk; struct task_struct *thread;