usb: renesas_usbhs: disable attch irq after device attached

attch interrupt might happen infinitely on some USB hub (self power?).
This patch disable attch irq after device attached,
and enable it again when detach irq happen.

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 72ee8e5..c947d0a 100644 (file)
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -1245,6 +1245,14 @@ static int usbhsh_irq_attch(struct usbhs_priv *priv,
        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
 
+       /*
+        * attch interrupt might happen infinitely on some device
+        * (on self power USB hub ?)
+        * disable it here.
+        */
+       hpriv->mod.irq_attch = NULL;
+       usbhs_irq_callback_update(priv, &hpriv->mod);
+
        return 0;
 }
 
@@ -1259,6 +1267,12 @@ static int usbhsh_irq_dtch(struct usbhs_priv *priv,
        usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
        usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
 
+       /*
+        * enable attch interrupt again
+        */
+       hpriv->mod.irq_attch = usbhsh_irq_attch;
+       usbhs_irq_callback_update(priv, &hpriv->mod);
+
        return 0;
 }