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VIRT_ADDR() converted the DMA buffer addresses to KSEG1, while the buffers come from g_buffers, which is linked in KSEG0 when the data memory is cached. Buffers then ended up in the free list under both aliases. Use the segment g_buffers is linked in instead. A buffer handed to an RX descriptor may still have dirty D-Cache lines, at least the free list link written into it. If such a line is evicted while the DMA writes the frame, it overwrites part of the frame. Discard the buffer from the D-Cache before giving it to the DMA. Assisted-by: Claude Code:claude-opus-5-5 Signed-off-by: Daniel P. Carvalho <danieloak@gmail.com> |
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