[PATCH net-next v1 1/3] net: stmmac: fix INTR TBU status affecting irq count statistic
From: Vijayakannan Ayyathurai <hidden>
Date: 2021-08-16 06:19:14
Also in:
lkml, netdev
Subsystem:
networking drivers, stmmac ethernet driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Maxime Chevallier, Linus Torvalds
From: Voon Weifeng <redacted>
DMA channel status "Transmit buffer unavailable(TBU)" bit is not
considered as a successful dma tx. Hence, it should not affect
all the irq count statistic.
Fixes: 1103d3a5531c ("net: stmmac: dwmac4: Also use TBU interrupt to clean TX path")
Signed-off-by: Voon Weifeng <redacted>
Signed-off-by: Vijayakannan Ayyathurai <redacted>
---
drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
index e63270267578..f83db62938dd 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_lib.c@@ -172,11 +172,12 @@ int dwmac4_dma_interrupt(void __iomem *ioaddr, x->rx_normal_irq_n++; ret |= handle_rx; } - if (likely(intr_status & (DMA_CHAN_STATUS_TI | - DMA_CHAN_STATUS_TBU))) { + if (likely(intr_status & DMA_CHAN_STATUS_TI)) { x->tx_normal_irq_n++; ret |= handle_tx; } + if (unlikely(intr_status & DMA_CHAN_STATUS_TBU)) + ret |= handle_tx; if (unlikely(intr_status & DMA_CHAN_STATUS_ERI)) x->rx_early_irq++;
--
2.17.1
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