usb: r8a66597-udc: fix spinlock usage

Because the disconnect function in the composite driver will call spin_lock,
this driver has to call spin_unlock before calling driver->disconnet().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 0151185..6dcc1f6 100644 (file)
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1083,7 +1083,9 @@ static void irq_device_state(struct r8a66597 *r8a66597)
 
        if (dvsq == DS_DFLT) {
                /* bus reset */
+               spin_unlock(&r8a66597->lock);
                r8a66597->driver->disconnect(&r8a66597->gadget);
+               spin_lock(&r8a66597->lock);
                r8a66597_update_usb_speed(r8a66597);
        }
        if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)