rtw89: pci: reclaim TX BD only if it really need

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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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Ping-Ke Shih 2022-04-21 20:08:52 +08:00 • committed by Kalle Valo

parent e1757e8045

commit 8372026846

1 changed files with 10 additions and 4 deletions

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drivers/net/wireless/realtek/rtw89/pci.c

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