usb: renesas_usbhs: fixup connection fail

Sometimes the connection fail happen on renesas_usbhs.
This patch fix it up.
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/renesas_usbhs/mod_gadget.c

@@ -462,8 +462,11 @@ static int usbhsg_ep_enable(struct usb_ep *ep,
 	 * if it already have pipe,
 	 * nothing to do
 	 */
-	if (uep->pipe)
+	if (uep->pipe) {
+		usbhs_pipe_clear(uep->pipe);
+		usbhs_pipe_clear_sequence(uep->pipe);
 		return 0;
+	}
 
 	pipe = usbhs_pipe_malloc(priv, desc);
 	if (pipe) {

drivers/usb/renesas_usbhs/pipe.c

@@ -500,6 +500,12 @@ void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe)
 	usbhsp_pipectrl_set(pipe, SQCLR, SQCLR);
 }
 
+void usbhs_pipe_clear(struct usbhs_pipe *pipe)
+{
+	usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
+	usbhsp_pipectrl_set(pipe, ACLRM, 0);
+}
+
 static struct usbhs_pipe *usbhsp_get_pipe(struct usbhs_priv *priv, u32 type)
 {
 	struct usbhs_pipe *pos, *pipe;
@@ -568,8 +574,7 @@ void usbhs_pipe_init(struct usbhs_priv *priv,
 		INIT_LIST_HEAD(&pipe->list);
 
 		/* pipe force init */
-		usbhsp_pipectrl_set(pipe, ACLRM, ACLRM);
-		usbhsp_pipectrl_set(pipe, ACLRM, 0);
+		usbhs_pipe_clear(pipe);
 	}
 
 	info->done = done;

drivers/usb/renesas_usbhs/pipe.h

@@ -87,6 +87,7 @@ void usbhs_pipe_init(struct usbhs_priv *priv,
 		     int (*dma_map_ctrl)(struct usbhs_pkt *pkt, int map));
 int usbhs_pipe_get_maxpacket(struct usbhs_pipe *pipe);
 void usbhs_pipe_clear_sequence(struct usbhs_pipe *pipe);
+void usbhs_pipe_clear(struct usbhs_pipe *pipe);
 int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe);
 void usbhs_pipe_enable(struct usbhs_pipe *pipe);
 void usbhs_pipe_disable(struct usbhs_pipe *pipe);