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 <b...@kernel.crashing.org>
---
drivers/macintosh/macio_asic.c | 11 +++++++++++
1 file changed, 11 insertions(+)
--- linux-work.orig/drivers/macintosh/macio_asic.c 2009-06-19
10:38:17.000000000 +1000
+++ linux-work/drivers/macintosh/macio_asic.c 2009-06-19 10:38:33.000000000
+1000
@@ -378,6 +378,17 @@ static struct macio_dev * macio_add_one_
dev->ofdev.dev.bus = &macio_bus_type;
dev->ofdev.dev.release = macio_release_dev;
+#ifdef CONFIG_PCI
+ /* Set the DMA ops to the ones from the PCI device, this could be
+ * fishy if we didn't know that on PowerMac it's always direct ops
+ * or iommu ops that will work fine
+ */
+ dev->ofdev.dev.archdata.dma_ops =
+ chip->lbus.pdev->dev.archdata.dma_ops;
+ dev->ofdev.dev.archdata.dma_data =
+ chip->lbus.pdev->dev.archdata.dma_data;
+#endif /* CONFIG_PCI */
+
#ifdef DEBUG
printk("preparing mdev @%p, ofdev @%p, dev @%p, kobj @%p\n",
dev, &dev->ofdev, &dev->ofdev.dev, &dev->ofdev.dev.kobj);
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