net: Only access network devices after init

In the efi_loader main loop we call eth_rx() occasionally. This rx function
might end up calling into devices that haven't been initialized yet,
potentially resulting in a lot of transfer timeouts.

Instead, let's make sure the ethernet device is actually initialized before
reading from or writing to it.

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

net/eth-uclass.c

@@ -336,7 +336,7 @@ int eth_send(void *packet, int length)
 	if (!current)
 		return -ENODEV;
 
-	if (!device_active(current))
+	if (!eth_is_active(current))
 		return -EINVAL;
 
 	ret = eth_get_ops(current)->send(current, packet, length);
@@ -359,7 +359,7 @@ int eth_rx(void)
 	if (!current)
 		return -ENODEV;
 
-	if (!device_active(current))
+	if (!eth_is_active(current))
 		return -EINVAL;
 
 	/* Process up to 32 packets at one time */