From ca42b79cde6e5a1cd08ce92c1d6cd11bcecc79ae Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 20 Jul 2018 03:50:09 +0000 Subject: [PATCH] x86/hyper-v: Fix wrong merge conflict resolution When the mapping betwween the Linux notion of CPU ID to the hypervisor's notion of CPU ID is not initialized, IPI must fall back to the non-enlightened path. The recent merge of upstream changes into the hyperv branch resolved a merge conflict wronly by returning success in that case, which results in the IPI not being sent at all. Fix it up. Fixes: fcc240912b5c ("Merge branch 'x86/urgent' into x86/hyperv") Reported-by: Michael Kelley Signed-off-by: K. Y. Srinivasan Signed-off-by: Thomas Gleixner Cc: gregkh@linuxfoundation.org Cc: devel@linuxdriverproject.org Cc: olaf@aepfle.de Cc: apw@canonical.com Cc: jasowang@redhat.com Cc: hpa@zytor.com Cc: sthemmin@microsoft.com Cc: Michael.H.Kelley@microsoft.com Cc: vkuznets@redhat.com Link: https://lkml.kernel.org/r/20180720035009.3995-1-kys@linuxonhyperv.com --- 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 0c3c9f8fee77b..5b0f613428c25 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 -- 2.39.5