There is a bug related to the use of DMA. Using wireless-testing 2.6.29-rc7 from ~3/15, and booting with "iommu=off mem=2G" gives me a working iwl3945. I also confirmed 78bb4a96d0d4ab2860df5f0fdfde58cd7a3ad642 "iwl3945: use iwl3945_tx_cmd instead of iwl_tx_cmd" plus previously posted "rb_stts and BUG to WARN" patch as working when iommu is disabled. So swiotlb exposes iwl3945 dma breakage. >From 78bb4a96d0d4ab2860df5f0fdfde58cd7a3ad642 "iwl3945: use iwl3945_tx_cmd instead of iwl_tx_cmd" the most obvious problem is the change to pci_map_single from pci_alloc_consistent. As previously noted, problems brought along by that include the modification of data to be DMAed after the _map_single call. The lack of associated un-mapping of memory may also be a problem. For testing, swiotlb use can be forced with "swiotlb=force" which should reproduce the error. Jason -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
