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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, kernel test robot <rong.a.chen@intel.com>,
        Max Gurtovoy <maxg@mellanox.com>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.8 195/232] vdpa_sim: init iommu lock
Date:   Thu, 20 Aug 2020 11:20:46 +0200
Message-Id: <20200820091622.235916680@linuxfoundation.org>
In-Reply-To: <20200820091612.692383444@linuxfoundation.org>
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From: Michael S. Tsirkin <mst@redhat.com>

[ Upstream commit 1e3e792650d2c0df8dd796906275b7c79e278664 ]

The patch adding the iommu lock did not initialize it.
The struct is zero-initialized so this is mostly a problem
when using lockdep.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Cc: Max Gurtovoy <maxg@mellanox.com>
Fixes: 0ea9ee430e74 ("vdpasim: protect concurrent access to iommu iotlb")
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 8ac6f341dcc16..412fa85ba3653 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -331,6 +331,7 @@ static struct vdpasim *vdpasim_create(void)
 
 	INIT_WORK(&vdpasim->work, vdpasim_work);
 	spin_lock_init(&vdpasim->lock);
+	spin_lock_init(&vdpasim->iommu_lock);
 
 	dev = &vdpasim->vdpa.dev;
 	dev->coherent_dma_mask = DMA_BIT_MASK(64);
-- 
2.25.1