On Wed, Jan 15, 2014 at 10:11:27AM +0100, Martin Pieuchot wrote: > On 14/01/14(Tue) 16:21, Sunny Raspet wrote: > > Hello! > > > > Running 5.4-RELEASE/macppc on a Mac PowerBook G4, attempting to > > interact with the built-in bwi(4) card results in badness. > > Sadly this is a know issue on most of the macppc machine having a > bwi(4). If somebody has more inputs I'm also interested ;) > > M.
It seems the bwi driver lacks support for PIO mode which the linux b43 driver falls back to in case of DMA errors such as this one. Two related linux commits: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3bd9190800e8209b4a3e1d724c35f0738dcad2 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5100d5ac81b9330dc57e35adbe50923ba6107b8f I'm not sure why the latter commit talks about PCMCIA but it mentions the powerbook G4.
