Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752067AbaK0UKB (ORCPT ); Thu, 27 Nov 2014 15:10:01 -0500 Received: from mx1.redhat.com ([209.132.183.28]:40814 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751006AbaK0UJ7 (ORCPT ); Thu, 27 Nov 2014 15:09:59 -0500 Date: Thu, 27 Nov 2014 22:09:41 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: David Miller , cornelia.huck@de.ibm.com, rusty@au1.ibm.com, nab@linux-iscsi.org, pbonzini@redhat.com, thuth@linux.vnet.ibm.com, dahi@linux.vnet.ibm.com, Rusty Russell , virtualization@lists.linux-foundation.org Subject: [PATCH v6 22/46] virtio_blk: fix race at module removal Message-ID: <1417118789-18231-23-git-send-email-mst@redhat.com> References: <1417118789-18231-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1417118789-18231-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If a device appears while module is being removed, driver will get a callback after we've given up on the major number. In theory this means this major number can get reused by something else, resulting in a conflict. Signed-off-by: Michael S. Tsirkin --- drivers/block/virtio_blk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 055f3df..1f8b111 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -884,8 +884,8 @@ out_destroy_workqueue: static void __exit fini(void) { - unregister_blkdev(major, "virtblk"); unregister_virtio_driver(&virtio_blk); + unregister_blkdev(major, "virtblk"); destroy_workqueue(virtblk_wq); } module_init(init); -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/