Commit 0555659d authored Feb 04, 2007 by Stefan Richter

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 <stefanr@s5r6.in-berlin.de>

parent f412bf44

drivers/ieee1394/sbp2.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -757,6 +757,11 @@ static struct sbp2_lu sbp2_alloc_device(struct unit_directory ud)
		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
		}