usb: musb: remove 'ignore_disconnect' flag

This was related to an old bug on early versions
of TUSB6010 which we don't support anymore.

It's known to cause issues on several other
situations with more recent devices so we
better remove this flag now and come up
with a better workaround should one be deemed
necessary.

Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_core.c

@@ -380,7 +380,6 @@ static void musb_otg_timer_func(unsigned long data)
 		dev_dbg(musb->controller, "HNP: Unhandled mode %s\n",
 			usb_otg_state_string(musb->xceiv->state));
 	}
-	musb->ignore_disconnect = 0;
 	spin_unlock_irqrestore(&musb->lock, flags);
 }
 
@@ -727,7 +726,6 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 b_host:
 			musb->xceiv->state = OTG_STATE_B_HOST;
 			hcd->self.is_b_host = 1;
-			musb->ignore_disconnect = 0;
 			del_timer(&musb->otg_timer);
 			break;
 		default:
@@ -750,7 +748,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				usb_otg_state_string(musb->xceiv->state), devctl);
 	}
 
-	if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
+	if (int_usb & MUSB_INTR_DISCONNECT) {
 		dev_dbg(musb->controller, "DISCONNECT (%s) as %s, devctl %02x\n",
 				usb_otg_state_string(musb->xceiv->state),
 				MUSB_MODE(musb), devctl);
@@ -818,11 +816,6 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				usb_otg_state_string(musb->xceiv->state));
 			switch (musb->xceiv->state) {
 			case OTG_STATE_A_SUSPEND:
-				/* We need to ignore disconnect on suspend
-				 * otherwise tusb 2.0 won't reconnect after a
-				 * power cycle, which breaks otg compliance.
-				 */
-				musb->ignore_disconnect = 1;
 				musb_g_reset(musb);
 				/* FALLTHROUGH */
 			case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
@@ -834,7 +827,6 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 					+ msecs_to_jiffies(TA_WAIT_BCON(musb)));
 				break;
 			case OTG_STATE_A_PERIPHERAL:
-				musb->ignore_disconnect = 0;
 				del_timer(&musb->otg_timer);
 				musb_g_reset(musb);
 				break;

drivers/usb/musb/musb_core.h

@@ -382,7 +382,6 @@ struct musb {
 	unsigned		is_active:1;
 
 	unsigned is_multipoint:1;
-	unsigned ignore_disconnect:1;	/* during bus resets */
 
 	unsigned		hb_iso_rx:1;	/* high bandwidth iso rx? */
 	unsigned		hb_iso_tx:1;	/* high bandwidth iso tx? */

drivers/usb/musb/musb_virthub.c

@@ -145,7 +145,6 @@ static void musb_port_reset(struct musb *musb, bool do_reset)
 			msleep(1);
 		}
 
-		musb->ignore_disconnect = true;
 		power &= 0xf0;
 		musb_writeb(mbase, MUSB_POWER,
 				power | MUSB_POWER_RESET);
@@ -158,8 +157,6 @@ static void musb_port_reset(struct musb *musb, bool do_reset)
 		musb_writeb(mbase, MUSB_POWER,
 				power & ~MUSB_POWER_RESET);
 
-		musb->ignore_disconnect = false;
-
 		power = musb_readb(mbase, MUSB_POWER);
 		if (power & MUSB_POWER_HSMODE) {
 			dev_dbg(musb->controller, "high-speed device connected\n");