shithub: riscv

Info  •  Files  •  Log  •  Branches

usbxhci: simplify xecp()

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

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

@@ -317,22 +317,20 @@

 {

 	u32int x;

-	if(p != nil) {

+	if(p == nil){

+		p = ctlr->mmio;

+		x = ctlr->hccparams>>16;

+	} else

+		x = (*p>>8) & 255;

+	while(x != 0){

+		p += x;

 		x = *p;

-		goto Next;

+		if((x & 255) == id)

+			return p;

+		x >>= 8;

+		x &= 255;

 	}

-	x = ctlr->hccparams>>16;

-	if(x == 0)

-		return nil;

-	p = ctlr->mmio + x;

-	while(((x = *p) & 255) != id){

-	Next:

-		x >>= 8, x &= 255;

-		if(x == 0)

-			return nil;

-		p += x;

-	}

-	return p;

+	return nil;

 }

 static void