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 5e98355f422b39e22110bded362de1939f85ce3f..3e4318d5dcdf5b7dc1c9c00aab8a7046a516cada 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_dma.c
@@ -199,10 +199,6 @@ 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,