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freebsd_network: Add missing segment size check to bus_dma logic.

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This commit is contained in:
Augustin Cavalier 2022-05-29 22:13:36 -04:00
parent 6f80a9801f
commit 26f691760c
1 changed files with 3 additions and 1 deletions
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4
src/libs/compat/freebsd_network/bus_dma.cpp
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@ -232,9 +232,11 @@ _bus_dmamap_load_buffer(bus_dma_tag_t dmat, bus_dmamap_t /* map */, void* buf,
while (buflen > 0) {
const bus_addr_t phys_addr = pmap_kextract(virtual_addr);
bus_size_t segment_size = B_PAGE_SIZE - (phys_addr & (B_PAGE_SIZE - 1));
bus_size_t segment_size = B_PAGE_SIZE - (phys_addr & PAGE_MASK);
if (segment_size > buflen)
segment_size = buflen;
if (segment_size > dmat->maxsegsz)
segment_size = dmat->maxsegsz;
if (dmat->boundary > 0) {
// Make sure we don't cross a boundary.