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ref: 43166ed050b8eaf9205e57c6eded4807310c24b5
parent: f9b061c9bd55ca930125e3f6ef0f6cfb331bd67e
author: Arne Meyer <meyer.arne83@netcologne.de>
date: Wed Jun 5 05:22:31 EDT 2024 

nusb/ether: Don't pass ethernet fcs to the network stack for smsc and lan78xx


--- a/sys/src/cmd/nusb/ether/lan78xx.c
+++ b/sys/src/cmd/nusb/ether/lan78xx.c
@@ -252,10 +252,11 @@
 			break;
 		if((hd & Rxerror) == 0){
 			if(n == BLEN(b)){
+				b->wr -= 4;
 				etheriq(b);
 				return 0;
 			}
-			etheriq(copyblock(b, n));
+			etheriq(copyblock(b, n - 4));
 		}
 		b->rp = (uchar*)(((uintptr)b->rp + n + 3)&~3);
 	}
--- a/sys/src/cmd/nusb/ether/smsc.c
+++ b/sys/src/cmd/nusb/ether/smsc.c
@@ -228,10 +228,11 @@
 			break;
 		if((hd & Rxerror) == 0){
 			if(n == BLEN(b)){
+				b->wp -= 4;
 				etheriq(b);
 				return 0;
 			}
-			etheriq(copyblock(b, n));
+			etheriq(copyblock(b, n - 4));
 		}
 		b->rp += (n + 3) & ~3;
 	}
-- 
⑨