net: qcom/emac: fix double free of SGMII IRQ during shutdown

If the interface is not up, then don't try to close it during a
shutdown.  This avoids possible double free of the IRQ, which
can happen during a shutdown.

Fixes: 03eb3eb4 ("net: qcom/emac: add shutdown function")
Signed-off-by: Timur Tabi <timur@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/qualcomm/emac/emac.c

@@ -766,11 +766,13 @@ static void emac_shutdown(struct platform_device *pdev)
 	struct emac_adapter *adpt = netdev_priv(netdev);
 	struct emac_sgmii *sgmii = &adpt->phy;
 
-	/* Closing the SGMII turns off its interrupts */
-	sgmii->close(adpt);
+	if (netdev->flags & IFF_UP) {
+		/* Closing the SGMII turns off its interrupts */
+		sgmii->close(adpt);
 
-	/* Resetting the MAC turns off all DMA and its interrupts */
-	emac_mac_reset(adpt);
+		/* Resetting the MAC turns off all DMA and its interrupts */
+		emac_mac_reset(adpt);
+	}
 }
 
 static struct platform_driver emac_platform_driver = {