ieee1394: revert "sbp2: enforce 32bit DMA mapping"

Revert commit 0555659d63c285ceb7ead3115532e1b71b0f27a7 from 2.6.22-rc1.
The dma_set_mask call somehow failed on a PowerMac G5, PPC64:
http://lkml.org/lkml/2007/8/1/344

Should there ever occur a DMA mapping beyond the physical DMA range, a
proper SBP-2 firmware will report transport errors.  So let's leave it
at that.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Tested-by: Olaf Hering <olh@suse.de>

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index e882cb951b474e06a11a861327f8dde7c73d316f..47dbe8f17e8210cabe7b87254b7ba1ac329a1c9d 100644 (file)
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -773,11 +773,6 @@ 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
        }