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powerpc/pmac: Fix DMA ops for MacIO devices
The macio_dev's created to map devices inside the MacIO ASICs don't have proper dma_ops. This causes crashes on some machines since the SCSI code calls dma_map_* on our behalf using the device we hang from. This fixes it by copying the parent PCI device dma_ops into the macio_dev when creating it. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -378,6 +378,17 @@ static struct macio_dev * macio_add_one_device(struct macio_chip *chip,
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dev->ofdev.dev.bus = &macio_bus_type;
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dev->ofdev.dev.release = macio_release_dev;
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#ifdef CONFIG_PCI
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/* Set the DMA ops to the ones from the PCI device, this could be
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* fishy if we didn't know that on PowerMac it's always direct ops
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* or iommu ops that will work fine
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*/
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dev->ofdev.dev.archdata.dma_ops =
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chip->lbus.pdev->dev.archdata.dma_ops;
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dev->ofdev.dev.archdata.dma_data =
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chip->lbus.pdev->dev.archdata.dma_data;
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#endif /* CONFIG_PCI */
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#ifdef DEBUG
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printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
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dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
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