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Ping-Ke Shih authored
To reclaim TX BD, we need to read hardware reading index to determine if any DMA is complete. Since this IO spends time, do this thing only if we really need it when TX BD has no free buffer corresponding to target skb. The experimental result shows that reading counter decreases from 26,000 to 130 per second. Signed-off-by:
Ping-Ke Shih <pkshih@realtek.com> Signed-off-by:
Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20220421120903.73715-4-pkshih@realtek.com
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