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etheriwl: dont clear descriptors after completion

--- a/sys/src/9/pc/etheriwl.c

+++ b/sys/src/9/pc/etheriwl.c

@@ -2240,7 +2240,7 @@

 receive(Ctlr *ctlr)

 {

 	Block *b, *bb;

-	uchar *d, *dd, *cc;

+	uchar *d;

 	RXQ *rx;

 	TXQ *tx;

 	uint hw;

@@ -2275,11 +2275,6 @@

 			if(tx->n > 0){

 				bb = tx->b[idx];

 				tx->b[idx] = nil;

-				/* paranoia: clear tx descriptors */

-				dd = tx->d + idx*Tdscsize;

-				cc = tx->c + idx*Tcmdsize;

-				memset(dd, 0, Tdscsize);

-				memset(cc, 0, Tcmdsize);

 				tx->n--;

 				wakeup(tx);

@@ -2362,13 +2357,10 @@

 		case 197:	/* rx compressed ba */

 			break;

 		}

-

-		/* paranoia: clear the descriptor */

-		memset(b->rp, 0, Rdscsize);

 	}

+	csr32w(ctlr, FhRxWptr, ((hw+Nrx-1) % Nrx) & ~7);

 	if(bb != nil)

 		freeb(bb);

-	csr32w(ctlr, FhRxWptr, ((hw+Nrx-1) % Nrx) & ~7);

 }

 static void

-- 

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