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From:   "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com>
To:     Vitaly Kuznetsov <vkuznets@redhat.com>,
        "x86@kernel.org" <x86@kernel.org>
CC:     KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        "devel@linuxdriverproject.org" <devel@linuxdriverproject.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH 1/2] x86/hyper-v: check cpumask_to_vpset() return value in
 hyperv_flush_tlb_others_ex()
Thread-Topic: [PATCH 1/2] x86/hyper-v: check cpumask_to_vpset() return value
 in hyperv_flush_tlb_others_ex()
Thread-Index: AQHUF6vosM6nFUt8gk6AuQep2ov9fqSI2vpw
Date:   Tue, 10 Jul 2018 19:38:06 +0000
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References: <20180709174012.17429-1-vkuznets@redhat.com>
 <20180709174012.17429-2-vkuznets@redhat.com>
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From: Vitaly Kuznetsov <vkuznets@redhat.com> Monday, July 9, 2018 10:40 AM
> Commit 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI
> enlightenment") made cpumask_to_vpset() return '-1' when there is a CPU
> with unknown VP index in the supplied set. This needs to be checked befor=
e
> we pass 'nr_bank' to hypercall.
>=20
> Fixes: 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI enl=
ightenment")
> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> ---
>  arch/x86/hyperv/mmu.c | 2 ++
>  1 file changed, 2 insertions(+)

Reviewed-by: Michael Kelley <mikelley@microsoft.com>