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Date: Tue, 11 Aug 2020 10:55:03 +0800 From: Jason Wang <jasowang@...hat.com> To: "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org Cc: kernel test robot <rong.a.chen@...el.com>, Max Gurtovoy <maxg@...lanox.com>, virtualization@...ts.linux-foundation.org, lkp@...ts.01.org Subject: Re: [PATCH] vdpa_sim: init iommu lock On 2020/8/10 下午8:48, Michael S. Tsirkin wrote: > 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@...el.com> > Cc: Max Gurtovoy <maxg@...lanox.com> > Fixes: 0ea9ee430e74 ("vdpasim: protect concurrent access to iommu iotlb") > Signed-off-by: Michael S. Tsirkin <mst@...hat.com> Acked-by: Jason Wang <jasowang@...hat.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);
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