From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751196AbdE2JN5 (ORCPT ); Mon, 29 May 2017 05:13:57 -0400 Received: from mx2.suse.de ([195.135.220.15]:33138 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750902AbdE2JNy (ORCPT ); Mon, 29 May 2017 05:13:54 -0400 From: Juergen Gross To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org Cc: boris.ostrovsky@oracle.com, Juergen Gross Subject: [PATCH] xen: don't print error message in case of missing Xenstore entry Date: Mon, 29 May 2017 11:13:39 +0200 Message-Id: <20170529091339.1449-1-jgross@suse.com> X-Mailer: git-send-email 2.12.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When registering for the Xenstore watch of the node control/sysrq the handler will be called at once. Don't issue an error message if the Xenstore node isn't there, as it will be created only when an event is being triggered. Signed-off-by: Juergen Gross --- drivers/xen/manage.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c index c1ec8ee80924..7ddd0803da23 100644 --- a/drivers/xen/manage.c +++ b/drivers/xen/manage.c @@ -277,8 +277,11 @@ static void sysrq_handler(struct xenbus_watch *watch, const char *path, err = xenbus_transaction_start(&xbt); if (err) return; - if (xenbus_scanf(xbt, "control", "sysrq", "%c", &sysrq_key) < 0) { - pr_err("Unable to read sysrq code in control/sysrq\n"); + err = xenbus_scanf(xbt, "control", "sysrq", "%c", &sysrq_key); + if (err < 0) { + if (err != -ENOENT) + pr_err("Error %d reading sysrq code in control/sysrq\n", + err); xenbus_transaction_end(xbt, 1); return; } -- 2.12.3