usb: gadget: goku_udc: Remove uses of seq_<foo> return values

The seq_printf/seq_puts/seq_putc return values, because they
are frequently misused, will eventually be converted to void.

See: commit 1f33c41c ("seq_file: Rename seq_overflow() to
     seq_has_overflowed() and make public")

Miscellanea:

o Coalesce formats, realign arguments
o Create static functions for statement expression macros
o Use c90 style comments instead of c99
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/goku_udc.c

@@ -1024,8 +1024,7 @@ static const char proc_node_name [] = "driver/udc";
 static void dump_intmask(struct seq_file *m, const char *label, u32 mask)
 {
 	/* int_status is the same format ... */
-	seq_printf(m,
-		"%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
+	seq_printf(m, "%s %05X =" FOURBITS EIGHTBITS EIGHTBITS "\n",
 		   label, mask,
 		   (mask & INT_PWRDETECT) ? " power" : "",
 		   (mask & INT_SYSERROR) ? " sys" : "",
@@ -1053,6 +1052,51 @@ static void dump_intmask(struct seq_file *m, const char *label, u32 mask)
 		   (mask & INT_SUSPEND) ? " suspend" : "");
 }
 
+static const char *udc_ep_state(enum ep0state state)
+{
+	switch (state) {
+	case EP0_DISCONNECT:
+		return "ep0_disconnect";
+	case EP0_IDLE:
+		return "ep0_idle";
+	case EP0_IN:
+		return "ep0_in";
+	case EP0_OUT:
+		return "ep0_out";
+	case EP0_STATUS:
+		return "ep0_status";
+	case EP0_STALL:
+		return "ep0_stall";
+	case EP0_SUSPEND:
+		return "ep0_suspend";
+	}
+
+	return "ep0_?";
+}
+
+static const char *udc_ep_status(u32 status)
+{
+	switch (status & EPxSTATUS_EP_MASK) {
+	case EPxSTATUS_EP_READY:
+		return "ready";
+	case EPxSTATUS_EP_DATAIN:
+		return "packet";
+	case EPxSTATUS_EP_FULL:
+		return "full";
+	case EPxSTATUS_EP_TX_ERR:	/* host will retry */
+		return "tx_err";
+	case EPxSTATUS_EP_RX_ERR:
+		return "rx_err";
+	case EPxSTATUS_EP_BUSY:		/* ep0 only */
+		return "busy";
+	case EPxSTATUS_EP_STALL:
+		return "stall";
+	case EPxSTATUS_EP_INVALID:	/* these "can't happen" */
+		return "invalid";
+	}
+
+	return "?";
+}
 
 static int udc_proc_read(struct seq_file *m, void *v)
 {
@@ -1079,18 +1123,7 @@ static int udc_proc_read(struct seq_file *m, void *v)
 		   is_usb_connected
 			   ? ((tmp & PW_PULLUP) ? "full speed" : "powered")
 			   : "disconnected",
-		({const char *state;
-		switch(dev->ep0state){
-		case EP0_DISCONNECT:	state = "ep0_disconnect"; break;
-		case EP0_IDLE:		state = "ep0_idle"; break;
-		case EP0_IN:		state = "ep0_in"; break;
-		case EP0_OUT:		state = "ep0_out"; break;
-		case EP0_STATUS:	state = "ep0_status"; break;
-		case EP0_STALL:		state = "ep0_stall"; break;
-		case EP0_SUSPEND:	state = "ep0_suspend"; break;
-		default:		state = "ep0_?"; break;
-		} state; })
-		);
+		   udc_ep_state(dev->ep0state));
 
 	dump_intmask(m, "int_status", readl(&regs->int_status));
 	dump_intmask(m, "int_enable", readl(&regs->int_enable));
@@ -1099,17 +1132,17 @@ static int udc_proc_read(struct seq_file *m, void *v)
 		goto done;
 
 	/* registers for (active) device and ep0 */
-	if (seq_printf(m, "\nirqs %lu\ndataset %02x "
-			"single.bcs %02x.%02x state %x addr %u\n",
+	seq_printf(m, "\nirqs %lu\ndataset %02x single.bcs %02x.%02x state %x addr %u\n",
 		   dev->irqs, readl(&regs->DataSet),
 		   readl(&regs->EPxSingle), readl(&regs->EPxBCS),
 		   readl(&regs->UsbState),
-			readl(&regs->address)) < 0)
+		   readl(&regs->address));
+	if (seq_has_overflowed(m))
 		goto done;
 
 	tmp = readl(&regs->dma_master);
-	if (seq_printf(m,
-		"dma %03X =" EIGHTBITS "%s %s\n", tmp,
+	seq_printf(m, "dma %03X =" EIGHTBITS "%s %s\n",
+		   tmp,
 		   (tmp & MST_EOPB_DIS) ? " eopb-" : "",
 		   (tmp & MST_EOPB_ENA) ? " eopb+" : "",
 		   (tmp & MST_TIMEOUT_DIS) ? " tmo-" : "",
@@ -1121,9 +1154,8 @@ static int udc_proc_read(struct seq_file *m, void *v)
 		   (tmp & MST_RD_ENA) ? " IN" : "",
 
 		   (tmp & MST_WR_ENA) ? " OUT" : "",
-		(tmp & MST_CONNECTION)
-			? "ep1in/ep2out"
-			: "ep1out/ep2in") < 0)
+		   (tmp & MST_CONNECTION) ? "ep1in/ep2out" : "ep1out/ep2in");
+	if (seq_has_overflowed(m))
 		goto done;
 
 	/* dump endpoint queues */
@@ -1135,44 +1167,23 @@ static int udc_proc_read(struct seq_file *m, void *v)
 			continue;
 
 		tmp = readl(ep->reg_status);
-		if (seq_printf(m,
-			"%s %s max %u %s, irqs %lu, "
-			"status %02x (%s) " FOURBITS "\n",
+		seq_printf(m, "%s %s max %u %s, irqs %lu, status %02x (%s) " FOURBITS "\n",
 			   ep->ep.name,
 			   ep->is_in ? "in" : "out",
 			   ep->ep.maxpacket,
 			   ep->dma ? "dma" : "pio",
 			   ep->irqs,
-			tmp, ({ char *s;
-			switch (tmp & EPxSTATUS_EP_MASK) {
-			case EPxSTATUS_EP_READY:
-				s = "ready"; break;
-			case EPxSTATUS_EP_DATAIN:
-				s = "packet"; break;
-			case EPxSTATUS_EP_FULL:
-				s = "full"; break;
-			case EPxSTATUS_EP_TX_ERR:	// host will retry
-				s = "tx_err"; break;
-			case EPxSTATUS_EP_RX_ERR:
-				s = "rx_err"; break;
-			case EPxSTATUS_EP_BUSY:		/* ep0 only */
-				s = "busy"; break;
-			case EPxSTATUS_EP_STALL:
-				s = "stall"; break;
-			case EPxSTATUS_EP_INVALID:	// these "can't happen"
-				s = "invalid"; break;
-			default:
-				s = "?"; break;
-			} s; }),
+			   tmp, udc_ep_status(tmp),
 			   (tmp & EPxSTATUS_TOGGLE) ? "data1" : "data0",
 			   (tmp & EPxSTATUS_SUSPEND) ? " suspend" : "",
 			   (tmp & EPxSTATUS_FIFO_DISABLE) ? " disable" : "",
-			(tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : ""
-			) < 0)
+			   (tmp & EPxSTATUS_STAGE_ERROR) ? " ep0stat" : "");
+		if (seq_has_overflowed(m))
 			goto done;
 
 		if (list_empty(&ep->queue)) {
-			if (seq_puts(m, "\t(nothing queued)\n") < 0)
+			seq_puts(m, "\t(nothing queued)\n");
+			if (seq_has_overflowed(m))
 				goto done;
 			continue;
 		}
@@ -1187,10 +1198,10 @@ static int udc_proc_read(struct seq_file *m, void *v)
 			} else
 				tmp = req->req.actual;
 
-			if (seq_printf(m,
-				"\treq %p len %u/%u buf %p\n",
+			seq_printf(m, "\treq %p len %u/%u buf %p\n",
 				   &req->req, tmp, req->req.length,
-				req->req.buf) < 0)
+				   req->req.buf);
+			if (seq_has_overflowed(m))
 				goto done;
 		}
 	}