[PATCH] vdpa_sim: init iommu lock

Michael S. Tsirkin
Mon, 10 Aug 2020 12:48:39 -0000

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 at intel.com>
Cc: Max Gurtovoy <maxg at mellanox.com>
Fixes: 0ea9ee430e74 ("vdpasim: protect concurrent access to iommu
iotlb")
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
 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 df3224b138ee..604d9d25ca47 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -358,6 +358,7 @@ 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);
--
MST