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ieee1394: sbp2: enforce 32bit DMA mapping

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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>
This commit is contained in:
Stefan Richter 2007-02-04 20:25:43 +01:00
parent f412bf440b
commit 0555659d63
1 changed files with 5 additions and 0 deletions
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5
drivers/ieee1394/sbp2.c
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@ -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
}