Date: Sun, 4 Feb 2007 20:25:43 +0100 (CET) From: Stefan Richter Subject: ieee1394: sbp2: enforce 32bit DMA mapping In order to use OHCI-1394 physical DMA, all s/g elements, s/g tables, ORBs, and response buffers have to reside within the first 4 GB of the FireWire controller's physical address space. Set the correct mask for DMA mappings. Signed-off-by: Stefan Richter --- drivers/ieee1394/sbp2.c | 5 +++++ 1 file changed, 5 insertions(+) Index: foo/drivers/ieee1394/sbp2.c =================================================================== --- foo.orig/drivers/ieee1394/sbp2.c +++ foo/drivers/ieee1394/sbp2.c @@ -757,6 +757,11 @@ static struct sbp2_lu *sbp2_alloc_device SBP2_ERR("failed to register lower 4GB address range"); goto failed_alloc; } +#else + if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) { + SBP2_ERR("failed to set 4GB DMA mask"); + goto failed_alloc; + } #endif }