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 72ee8e55e717e5e8c30f221862b53a05f46ccdf2..c947d0aca9bfb68defc75044d5d75d5bd489a864 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;
 }