diff options
| author | Nishanth Aravamudan <nacc@us.ibm.com> | 2010-10-18 07:27:04 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2010-12-09 15:17:50 +1100 |
| commit | b3c73856ae47d43d0d181f9de1c1c6c0820c4515 (patch) | |
| tree | e7528ed3ed14b57f5861edb528c86adb1c66c393 | |
| parent | 56d8adc5695a8d3f070c8498d532389580af5611 (diff) | |
powerpc/iommu: Use coherent_dma_mask for alloc_coherent
The IOMMU code has been passing the dma-mask instead of the
coherent_dma_mask to the iommu allocator. Coherent allocations should
be made using the coherent_dma_mask.
Also update the vio code to ensure the coherent_dma_mask is set. Without
this change drivers, such as ibmvscsi, fail to load with the corrected
dma_iommu_alloc_coherent().
Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/dma-iommu.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vio.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 6e54a0fd31a..e7554154a6d 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -19,7 +19,7 @@ static void *dma_iommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag) { return iommu_alloc_coherent(dev, get_iommu_table_base(dev), size, - dma_handle, device_to_mask(dev), flag, + dma_handle, dev->coherent_dma_mask, flag, dev_to_node(dev)); } diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c index b2654058f2e..1b695fdc362 100644 --- a/arch/powerpc/kernel/vio.c +++ b/arch/powerpc/kernel/vio.c @@ -1257,6 +1257,10 @@ struct vio_dev *vio_register_device_node(struct device_node *of_node) viodev->dev.parent = &vio_bus_device.dev; viodev->dev.bus = &vio_bus_type; viodev->dev.release = vio_dev_release; + /* needed to ensure proper operation of coherent allocations + * later, in case driver doesn't set it explicitly */ + dma_set_mask(&viodev->dev, DMA_BIT_MASK(64)); + dma_set_coherent_mask(&viodev->dev, DMA_BIT_MASK(64)); /* register with generic device framework */ if (device_register(&viodev->dev)) { |