usb: renesas_usbhs: add force packet remove method

Packet should be force removed when reset/detach

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
index 9715a70..92dcc7e 100644 (file)
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -703,6 +703,34 @@ static int usbhsh_queue_push(struct usb_hcd *hcd,
        return 0;
 }
 
+static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
+                                  struct usbhs_pipe *pipe)
+{
+       struct usbhs_pkt *pkt;
+
+       while (1) {
+               pkt = usbhs_pkt_pop(pipe, NULL);
+               if (!pkt)
+                       break;
+
+               /*
+                * if all packet are gone, usbhsh_endpoint_disable()
+                * will be called.
+                * then, attached device/endpoint/pipe will be detached
+                */
+               usbhsh_queue_done(priv, pkt);
+       }
+}
+
+static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
+{
+       struct usbhs_pipe *pos;
+       int i;
+
+       usbhs_for_each_pipe_with_dcp(pos, priv, i)
+               usbhsh_queue_force_pop(priv, pos);
+}
+
 /*
  *             DCP setup stage
  */
@@ -1106,6 +1134,8 @@ static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
                                       USB_PORT_STAT_HIGH_SPEED |
                                       USB_PORT_STAT_LOW_SPEED);
 
+               usbhsh_queue_force_pop_all(priv);
+
                usbhs_bus_send_reset(priv);
                msleep(20);
                usbhs_bus_send_sof_enable(priv);
@@ -1309,6 +1339,12 @@ static int usbhsh_irq_dtch(struct usbhs_priv *priv,
        hpriv->mod.irq_attch = usbhsh_irq_attch;
        usbhs_irq_callback_update(priv, &hpriv->mod);
 
+       /*
+        * usbhsh_queue_force_pop_all() should be called
+        * after usbhsh_is_running() becomes invalid.
+        */
+       usbhsh_queue_force_pop_all(priv);
+
        return 0;
 }