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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>
This commit is contained in:
Joerg Roedel 2012-06-21 14:52:40 +02:00
parent f2f12b6fc0
commit ac1534a55d
1 changed files with 9 additions and 0 deletions
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9
drivers/iommu/amd_iommu.c
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@ -83,6 +83,8 @@ static struct iommu_ops amd_iommu_ops;
static ATOMIC_NOTIFIER_HEAD(ppr_notifier);
int amd_iommu_max_glx_val = -1;
static struct dma_map_ops amd_iommu_dma_ops;
/*
* general struct to manage commands send to an IOMMU
*/
@ -2267,6 +2269,13 @@ static int device_change_notifier(struct notifier_block *nb,
list_add_tail(&dma_domain->list, &iommu_pd_list);
spin_unlock_irqrestore(&iommu_pd_list_lock, flags);
dev_data = get_dev_data(dev);
if (!dev_data->passthrough)
dev->archdata.dma_ops = &amd_iommu_dma_ops;
else
dev->archdata.dma_ops = &nommu_dma_ops;
break;
case BUS_NOTIFY_DEL_DEVICE: