diff options
| author | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-21 14:52:40 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2012-06-25 13:16:00 +0200 |
| commit | ac1534a55d1e87d59a21c09c570605933b551480 (patch) | |
| tree | 3aa5ff3307a98fde03f28aba24f2cb842d34cf9d /drivers/iommu/amd_iommu.c | |
| parent | f2f12b6fc032c7b1419fd6db84e2868b5f05a878 (diff) | |
| download | linux-next-ac1534a55d1e87d59a21c09c570605933b551480.tar.gz | |
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>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index a2e418cba0ff..dfe7d37c82c5 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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: |