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From:   Wei Liu <wei.liu@kernel.org>
To:     Linux on Hyper-V List <linux-hyperv@vger.kernel.org>
Cc:     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>,
        pasha.tatashin@soleen.com, Wei Liu <wei.liu@kernel.org>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>
Subject: [PATCH v6 03/16] Drivers: hv: vmbus: skip VMBus initialization if Linux is root
Date:   Wed,  3 Feb 2021 15:04:22 +0000
Message-Id: <20210203150435.27941-4-wei.liu@kernel.org>
In-Reply-To: <20210203150435.27941-1-wei.liu@kernel.org>
References: <20210203150435.27941-1-wei.liu@kernel.org>
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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>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
---
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;
+
 	init_completion(&probe_event);
 
 	/*
-- 
2.20.1