On Tue, Feb 19, 2019 at 12:57:18AM +0200, Meelis Roos wrote: > I tried latest Linux on HP A180C (32-bit pa-risc). It works but the Zalon > SCSI driver barfs warnings for GSC addon differential scsi board. > > The warnings seem to be DMA API related. Packaged 4.19 and self-compiled > 5.0.0-rc7 exhibit the same problem.
It looks like the driver is trying to free DMA coherent memory with irqs disabled, which is a big no-go on most non-coherent architectures (which includes parisc). The DMA coherent code in this driver is pretty convoluted, but I'll see what I can do. The warning has been there for a couple kernel release, and the issue basically goes back to day 0 of support for non-coherent architectures. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
