From 0555659d63c285ceb7ead3115532e1b71b0f27a7 Mon Sep 17 00:00:00 2001
From: Stefan Richter <stefanr@s5r6.in-berlin.de>
Date: Sun, 4 Feb 2007 20:25:43 +0100
Subject: [PATCH] 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>
---
drivers/ieee1394/sbp2.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index 4edfff46b1e6..e15b5d7b9a02 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
}
--
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