From: Michael S. Tsirkin <mst@redhat.com>
Date: Mon, 10 Aug 2020 12:44:43 +0000 (-0400)
Subject: vdpa_sim: init iommu lock
X-Git-Tag: v5.7.17~39
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9260a439b91059d9ab6752802f48494792fa1189;p=thirdparty%2Fkernel%2Fstable.git

vdpa_sim: init iommu lock

[ 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>
---

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index e2dc8edd680e0..3554f8de00e64 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -330,6 +330,7 @@ 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);