linux-kernel - [PATCH 1/1] x86/hyper-v: Fix a merge error

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Date:   Fri, 20 Jul 2018 03:50:09 +0000
From:   kys@...uxonhyperv.com
To:     x86@...nel.org, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
        olaf@...fle.de, apw@...onical.com, jasowang@...hat.com,
        tglx@...utronix.de, hpa@...or.com, sthemmin@...rosoft.com,
        Michael.H.Kelley@...rosoft.com, vkuznets@...hat.com
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>
Subject: [PATCH 1/1] x86/hyper-v: Fix a merge error

From: "K. Y. Srinivasan" <kys@...rosoft.com>

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 <mikelley@...rosoft.com>
Signed-off-by: K. Y. Srinivasan <kys@...rosoft.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 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