From: Voon Weifeng weifeng.voon@intel.com
[ Upstream commit 1975df880b959e30f28d66148a12d77b458abd76 ]
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 weifeng.voon@intel.com Signed-off-by: Vijayakannan Ayyathurai vijayakannan.ayyathurai@intel.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- 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++;