Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759886AbcDJTIl (ORCPT ); Sun, 10 Apr 2016 15:08:41 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:53970 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759755AbcDJTIe (ORCPT ); Sun, 10 Apr 2016 15:08:34 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Selvan Mani , Asai Thambi S P , Jens Axboe Subject: [PATCH 4.4 107/210] mtip32xx: Fix for rmmod crash when drive is in FTL rebuild Date: Sun, 10 Apr 2016 11:35:28 -0700 Message-Id: <20160410183530.408001874@linuxfoundation.org> X-Mailer: git-send-email 2.8.0 In-Reply-To: <20160410183526.651820045@linuxfoundation.org> References: <20160410183526.651820045@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2312 Lines: 74 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Asai Thambi SP commit 59cf70e236c96594d9f1e065755d8fce9df5356b upstream. When FTL rebuild is in progress, alloc_disk() initializes the disk but device node will be created by add_disk() only after successful completion of FTL rebuild. So, skip deletion of device node in removal path when FTL rebuild is in progress. Signed-off-by: Selvan Mani Signed-off-by: Asai Thambi S P Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- drivers/block/mtip32xx/mtip32xx.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) --- a/drivers/block/mtip32xx/mtip32xx.c +++ b/drivers/block/mtip32xx/mtip32xx.c @@ -2975,10 +2975,8 @@ restart_eh: } if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { - if (mtip_ftl_rebuild_poll(dd) < 0) - set_bit(MTIP_DDF_REBUILD_FAILED_BIT, - &dd->dd_flag); - clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); + if (mtip_ftl_rebuild_poll(dd) == 0) + clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); } } @@ -3858,7 +3856,6 @@ static int mtip_block_initialize(struct mtip_hw_debugfs_init(dd); -skip_create_disk: memset(&dd->tags, 0, sizeof(dd->tags)); dd->tags.ops = &mtip_mq_ops; dd->tags.nr_hw_queues = 1; @@ -3888,6 +3885,7 @@ skip_create_disk: dd->disk->queue = dd->queue; dd->queue->queuedata = dd; +skip_create_disk: /* Initialize the protocol layer. */ wait_for_rebuild = mtip_hw_get_identify(dd); if (wait_for_rebuild < 0) { @@ -4048,7 +4046,8 @@ static int mtip_block_remove(struct driv dd->bdev = NULL; } if (dd->disk) { - del_gendisk(dd->disk); + if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) + del_gendisk(dd->disk); if (dd->disk->queue) { blk_cleanup_queue(dd->queue); blk_mq_free_tag_set(&dd->tags); @@ -4089,7 +4088,8 @@ static int mtip_block_shutdown(struct dr dev_info(&dd->pdev->dev, "Shutting down %s ...\n", dd->disk->disk_name); - del_gendisk(dd->disk); + if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) + del_gendisk(dd->disk); if (dd->disk->queue) { blk_cleanup_queue(dd->queue); blk_mq_free_tag_set(&dd->tags);