From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E266ECDFB8 for ; Fri, 20 Jul 2018 04:03:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3AA2420856 for ; Fri, 20 Jul 2018 04:03:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3AA2420856 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxonhyperv.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727275AbeGTEt7 (ORCPT ); Fri, 20 Jul 2018 00:49:59 -0400 Received: from a2nlsmtp01-02.prod.iad2.secureserver.net ([198.71.225.36]:54220 "EHLO a2nlsmtp01-02.prod.iad2.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725737AbeGTEt6 (ORCPT ); Fri, 20 Jul 2018 00:49:58 -0400 X-Greylist: delayed 677 seconds by postgrey-1.27 at vger.kernel.org; Fri, 20 Jul 2018 00:49:58 EDT Received: from linuxonhyperv2.linuxonhyperv.com ([107.180.71.197]) by : HOSTING RELAY : with SMTP id gMS0f6mKIdH2EgMS0frhbm; Thu, 19 Jul 2018 20:51:29 -0700 x-originating-ip: 107.180.71.197 Received: from kys by linuxonhyperv2.linuxonhyperv.com with local (Exim 4.91) (envelope-from ) id 1fgMS0-00013l-E8; Thu, 19 Jul 2018 20:51:28 -0700 From: kys@linuxonhyperv.com To: x86@kernel.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com, tglx@linutronix.de, hpa@zytor.com, sthemmin@microsoft.com, Michael.H.Kelley@microsoft.com, vkuznets@redhat.com Cc: "K. Y. Srinivasan" Subject: [PATCH 1/1] x86/hyper-v: Fix a merge error Date: Fri, 20 Jul 2018 03:50:09 +0000 Message-Id: <20180720035009.3995-1-kys@linuxonhyperv.com> X-Mailer: git-send-email 2.17.1 Reply-To: kys@microsoft.com X-CMAE-Envelope: MS4wfJKTRWPRD87MhCqrwrQb9A19BU85KTPsqEzrZ1iKfhCwn7WvRx0jcm5th1EhDWdLpH2XmhATGG6Jjvhf7Sfqjl5Bkpmy7Qu8bim6QyYdiDvD6cpe2WSs hEqwO3koyRR9e+qjr8EISyRi9PyvB6+elqay6dcl2MGQza2lzLSYaCjm9D08dfXlC0BBhXHEruUmt4kt4SbEXP3fJlrZv/s2Eqpr6IKjdqcJWCqtmQs6YUWn wP+Q72C1ljDqzIeUYAJwPPXZjoP/bO3PCg0RjlDCaORxpSe9v5lxofrftObqSpYuA82ZbhInuL1S2jxeUs4CDessM6QHL5s2Lfagzgq+uG8E4z5gQaQc36Y6 IDhIyHDXC0yiAXxxxzL0RA5KvnXQc/eTTyLUkpEtk0DyF4hCDbonayS7pXAyozkF9vvJwDiLVvR8cQBv5daFgkF3X8pBSYRDgm+QVPNpreaR0TEfIHSzjV0A QO6Qi8o8yLJHUDSMP66r+u0865r1vksWzFNnuijNwORFWv7mX7GbhsOtiapeyVU3WcWDMaO/byCXOGLUhLzgUyC6XWLzgEOzQKmxQgLoQ0g/CdRbrxdt42Nt 5XZS8hXFLdeD7vBcarSjrNXt Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "K. Y. Srinivasan" When the mapping betwween the Linux notion of CPU ID to the hypervisor's notion of CPU ID is not initialized, we should fall back on the non-enligghtened path for IPI. A merge error introduced this bug; fix it. Fixes: 1268ed0c474a ("Merge branch 'x86/urgent' into x86/hyperv") Reported-by: Michael Kelley Signed-off-by: K. Y. Srinivasan --- arch/x86/hyperv/hv_apic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c index 0c3c9f8fee77..5b0f613428c2 100644 --- a/arch/x86/hyperv/hv_apic.c +++ b/arch/x86/hyperv/hv_apic.c @@ -168,7 +168,7 @@ static bool __send_ipi_mask(const struct cpumask *mask, int vector) for_each_cpu(cur_cpu, mask) { vcpu = hv_cpu_number_to_vp_number(cur_cpu); if (vcpu == VP_INVAL) - return true; + return false; /* * This particular version of the IPI hypercall can -- 2.17.1