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e557905435
uio segment is empty. In this case no dma segment is create by bus_dmamap_load_buffer, but the calling routine clears the first flag. Under certain combinations of addresses of the first and second mbuf/uio buffer this leads to corrupted DMA segment descriptors. This was already fixed by tmm in sparc64/sparc64/iommu.c. PR: kern/47733 Reviewed by: sam Approved by: jake (mentor) |
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