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authorStefan Richter <stefanr@s5r6.in-berlin.de>2007-02-04 20:25:43 +0100
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-04-30 00:00:27 +0200
commit0555659d63c285ceb7ead3115532e1b71b0f27a7 (patch)
tree45e8f594a9e8d738bd8966649433516790285df8
parentf412bf440be2dfc0f0ded917410c599c002549e0 (diff)
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>
-rw-r--r--drivers/ieee1394/sbp2.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 4edfff46b1e..e15b5d7b9a0 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -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
}