[PATCH net] net: ethernet: adi: adin1110: mask the RX IRQ of the port being stopped

[Yuehong Wu]

adin1110_net_stop() programs the RX-ready interrupt mask of the wrong
port: it uses ADIN2111_RX_RDY_IRQ (the second port's bit) when stopping
port 0 and ADIN1110_RX_RDY_IRQ (the first port's bit) when stopping
port 1, while adin1110_port_rx_ready() uses the opposite mapping, port 0
-> ADIN1110_RX_RDY and port 1 -> ADIN2111_P2_RX_RDY.

The port being stopped therefore keeps its own RX interrupt enabled
while the peer's is masked.  On ADIN2111 that stalls RX on the peer port;
on ADIN1110 the RX interrupt is never masked at all.  As the interrupt is
level triggered and adin1110_read_frames() skips the FIFO while
netif_oper_up() is false, the stopped port also keeps re-raising its
interrupt with nobody draining the FIFO.

Swap the two bits so the port being stopped masks its own interrupt.

Fixes: bc93e19d088b ("net: ethernet: adi: Add ADIN1110 support")
Signed-off-by: Yuehong Wu <wuyuehong@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/net/ethernet/adi/adin1110.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/adi/adin1110.c b/drivers/net/ethernet/adi/adin1110.c
index 53fac3d..abdc160 100644
--- a/drivers/net/ethernet/adi/adin1110.c
+++ b/drivers/net/ethernet/adi/adin1110.c
@@ -945,7 +945,7 @@ static int adin1110_net_stop(struct net_device *net_dev)
 	u32 mask;
 	int ret;
 
-	mask = !port_priv->nr ? ADIN2111_RX_RDY_IRQ : ADIN1110_RX_RDY_IRQ;
+	mask = !port_priv->nr ? ADIN1110_RX_RDY_IRQ : ADIN2111_RX_RDY_IRQ;
 
 	/* Disable RX RDY IRQs */
 	mutex_lock(&priv->lock);
-- 
2.43.0