On Sat, Dec 08, 2018 at 09:41:12AM -0800, Christoph Hellwig wrote: > There is no good reason to have a double indirection for the sparc32 > dma ops, so remove the sparc32_dma_ops and define separate dma_map_ops > instance for the different IOMMU types. > Except maybe this: scsi host0: esp scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi 0:0:0:0: Direct-Access QEMU QEMU HARDDISK 2.5+ PQ: 0 ANSI: 5 scsi target0:0:0: Beginning Domain Validation scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] and so on, until qemu is terminated. This is seen with all sparc32 qemu emulations. Reverting the patch fixes the problem. Guenter
