net: stmmac: xgmac: Do not enable RX FIFO Overflow interrupts

[ Upstream commit 4f23382841e67174211271a454811dd17c0ef3c5 ]

Enabling RX FIFO Overflow interrupts is counterproductive
and causes an interrupt storm when RX FIFO overflows.
Disabling this interrupt has no side effect and eliminates
interrupt storms when the RX FIFO overflows.

Commit 8a7cb245cf28 ("net: stmmac: Do not enable RX FIFO
overflow interrupts") disables RX FIFO overflow interrupts
for DWMAC4 IP and removes the corresponding handling of
this interrupt. This patch is doing the same thing for
XGMAC IP.

Fixes: 2142754f8b9c ("net: stmmac: Add MAC related callbacks for XGMAC2")
Signed-off-by: Rohan G Thomas <rohan.g.thomas@altera.com>
Reviewed-by: Matthew Gerlach <matthew.gerlach@altera.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20250825-xgmac-minor-fixes-v3-1-c225fe4444c0@altera.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
index 07ef0ac725b3e9cbc7fef2c76b78d81f312c0779..93d1b78c9d4ecce9106779460c63624ff2d3b85e 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -206,10 +206,6 @@ static void dwxgmac2_dma_rx_mode(void __iomem *ioaddr, int mode,
        }
 
        writel(value, ioaddr + XGMAC_MTL_RXQ_OPMODE(channel));
-
-       /* Enable MTL RX overflow */
-       value = readl(ioaddr + XGMAC_MTL_QINTEN(channel));
-       writel(value | XGMAC_RXOIE, ioaddr + XGMAC_MTL_QINTEN(channel));
 }
 
 static void dwxgmac2_dma_tx_mode(void __iomem *ioaddr, int mode,