From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756929AbcEaJAD (ORCPT ); Tue, 31 May 2016 05:00:03 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:50941 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756901AbcEaI77 (ORCPT ); Tue, 31 May 2016 04:59:59 -0400 From: Bob Liu To: linux-kernel@vger.kernel.org Cc: xen-devel@lists.xenproject.org, konrad.wilk@oracle.com, roger.pau@citrix.com, Bob Liu Subject: [PATCH 1/2] xen-blkfront: don't call talk_to_blkback when already connected to blkback Date: Tue, 31 May 2016 16:59:16 +0800 Message-Id: <1464685157-30738-1-git-send-email-bob.liu@oracle.com> X-Mailer: git-send-email 1.7.10.4 X-Source-IP: userv0021.oracle.com [156.151.31.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sometimes blkfont may receive twice blkback_changed() notification after migration, then talk_to_blkback() will be called twice too and confused xen-blkback. Signed-off-by: Bob Liu --- drivers/block/xen-blkfront.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index ca13df8..01aa460 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -2485,7 +2485,8 @@ static void blkback_changed(struct xenbus_device *dev, break; case XenbusStateConnected: - if (dev->state != XenbusStateInitialised) { + if ((dev->state != XenbusStateInitialised) && + (dev->state != XenbusStateConnected)) { if (talk_to_blkback(dev, info)) break; } -- 2.7.4