On Wed, Feb 06, 2019 at 02:45:34PM +0100, Christian Zigotzky wrote: > I patched the source code from the Git 'powerpc-dma.6' with your patch > today. Unfortunately the P.A. Semi Ethernet doesn't work with the patched > Git kernel. > > After that I tried it with the patch applied over the working setup again > (powerpc/dma: use the dma_direct mapping routines). Unfortunately after > compiling > and booting, the P.A. Semi Ethernet doesn't work either. The last good one was 29e7e2287e196f48fe5d2a6e017617723ea979bf ("dma-direct: we might need GFP_DMA for 32-bit dma masks"), if I remember correctly. powerpc/dma: use the dma_direct mapping routines was the one that you said makes the pasemi ethernet stop working. Can you post the dmesg from the failing runs?