[Xen-bugs] [Bug 915] VPCI crashes domU kernel with dedicated NIC when changing MTU to 9000

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http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=915





------- Comment #1 from jan.oravec@xxxxxxx  2007-03-04 17:21 -------
Looking at the pci-dma-xen.c:342:

dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
               enum dma_data_direction direction)
{
        dma_addr_t dma;  

        BUG_ON(!valid_dma_direction(direction));
        WARN_ON(size == 0);

        if (swiotlb) {
                dma = swiotlb_map_single(dev, ptr, size, direction);
        } else {
                dma = virt_to_bus(ptr);
                IOMMU_BUG_ON(range_straddles_page_boundary(ptr, size));
                IOMMU_BUG_ON(address_needs_mapping(dev, dma));
        }

        flush_write_buffers();
        return dma;
}
EXPORT_SYMBOL(dma_map_single);


Line 342 is IOMMU_BUG_ON(range_straddles_page_boundary) as expected...


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