iommu/amd: Initialize dma_ops for hotplug and sriov devices
When a device is added to the system at runtime the AMD IOMMU driver initializes the necessary data structures to handle translation for it. But it forgets to change the per-device dma_ops to point to the AMD IOMMU driver. So mapping actually never happens and all DMA accesses end in an IO_PAGE_FAULT. Fix this. Reported-by: Stefan Assmann <sassmann@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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@ -83,6 +83,8 @@ static struct iommu_ops amd_iommu_ops;
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static ATOMIC_NOTIFIER_HEAD(ppr_notifier);
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int amd_iommu_max_glx_val = -1;
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static struct dma_map_ops amd_iommu_dma_ops;
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/*
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* general struct to manage commands send to an IOMMU
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*/
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@ -2267,6 +2269,13 @@ static int device_change_notifier(struct notifier_block *nb,
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list_add_tail(&dma_domain->list, &iommu_pd_list);
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spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
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dev_data = get_dev_data(dev);
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if (!dev_data->passthrough)
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dev->archdata.dma_ops = &amd_iommu_dma_ops;
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else
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dev->archdata.dma_ops = &nommu_dma_ops;
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break;
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case BUS_NOTIFY_DEL_DEVICE:
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