forked from luck/tmp_suning_uos_patched
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>
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@ -757,6 +757,11 @@ static struct sbp2_lu *sbp2_alloc_device(struct unit_directory *ud)
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SBP2_ERR("failed to register lower 4GB address range");
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goto failed_alloc;
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}
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#else
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if (dma_set_mask(hi->host->device.parent, DMA_32BIT_MASK)) {
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SBP2_ERR("failed to set 4GB DMA mask");
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goto failed_alloc;
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}
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#endif
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}
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