[PATCH 1/3] sh_eth: handle only enabled E-MAC interrupts

The driver should only handle the enabled E-MAC interrupts, like it does
for the E-DMAC interrupts since commit 3893b27345ac ("sh_eth: workaround
for spurious ECI interrupt"),  so mask ECSR with  ECSIPR when reading it
in sh_eth_error().

Signed-off-by: Sergei Shtylyov <redacted>

---
 drivers/net/ethernet/renesas/sh_eth.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Index: renesas/drivers/net/ethernet/renesas/sh_eth.c
===================================================================

--- renesas.orig/drivers/net/ethernet/renesas/sh_eth.c
+++ renesas/drivers/net/ethernet/renesas/sh_eth.c

@@ -1535,7 +1535,8 @@ static void sh_eth_error(struct net_devi
 	u32 mask;
 
 	if (intr_status & EESR_ECI) {
-		felic_stat = sh_eth_read(ndev, ECSR);
+		felic_stat = sh_eth_read(ndev, ECSR) &
+			     sh_eth_read(ndev, ECSIPR);
 		sh_eth_write(ndev, felic_stat, ECSR);	/* clear int */
 		if (felic_stat & ECSR_ICD)
 			ndev->stats.tx_carrier_errors++;