Index: uspace/srv/hw/netif/ne2000/dp8390.c
===================================================================
--- uspace/srv/hw/netif/ne2000/dp8390.c	(revision d0110381e3e00b2383e99221c0726056fa4e3985)
+++ uspace/srv/hw/netif/ne2000/dp8390.c	(revision 8f175038564226112feabc21c53e7cecfd8adc56)
@@ -391,4 +391,5 @@
 	
 	if ((size < ETH_MIN_PACK_SIZE) || (size > ETH_MAX_PACK_SIZE_TAGGED)) {
+		fibril_mutex_unlock(&ne2k->sq_mutex);
 		fprintf(stderr, "%s: Frame dropped (invalid size %zu bytes)\n",
 		    NAME, size);