Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
MIME-Version: 1.0
References: <20210120120058.29138-1-wei.liu@kernel.org> <20210120120058.29138-4-wei.liu@kernel.org>
In-Reply-To: <20210120120058.29138-4-wei.liu@kernel.org>
From:   Pavel Tatashin <pasha.tatashin@soleen.com>
Date:   Wed, 20 Jan 2021 11:06:58 -0500
Message-ID: <CA+CK2bBUSN5N4XYepibbvakKFgkzEWwFN4DUMrufPtDrYBJvDQ@mail.gmail.com>
Subject: Re: [PATCH v5 03/16] Drivers: hv: vmbus: skip VMBus initialization if
 Linux is root
To:     Wei Liu <wei.liu@kernel.org>
Cc:     Linux on Hyper-V List <linux-hyperv@vger.kernel.org>,
        virtualization@lists.linux-foundation.org,
        Linux Kernel List <linux-kernel@vger.kernel.org>,
        Michael Kelley <mikelley@microsoft.com>,
        Vineeth Pillai <viremana@linux.microsoft.com>,
        Sunil Muthuswamy <sunilmut@microsoft.com>,
        Nuno Das Neves <nunodasneves@linux.microsoft.com>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Wed, Jan 20, 2021 at 7:01 AM Wei Liu <wei.liu@kernel.org> wrote:
>
> There is no VMBus and the other infrastructures initialized in
> hv_acpi_init when Linux is running as the root partition.
>
> Signed-off-by: Wei Liu <wei.liu@kernel.org>
> ---
> v3: Return 0 instead of -ENODEV.
> ---
>  drivers/hv/vmbus_drv.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index 502f8cd95f6d..ee27b3670a51 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -2620,6 +2620,9 @@ static int __init hv_acpi_init(void)
>         if (!hv_is_hyperv_initialized())
>                 return -ENODEV;
>
> +       if (hv_root_partition)
> +               return 0;
> +

Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>