USB: ti serial driver sleeps with spinlock held

you are submitting an URB with GFP_KERNEL holding a spinlock.
In this case the spinlock can be dropped earlier.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Cc: Al Borchers <alborchers@steinerpoint.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 4203e2b1a761..3d505fd0645b 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -1555,15 +1555,17 @@ static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
         spin_lock_irqsave(&tport->tp_lock, flags);
 
         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
+                tport->tp_read_urb_state = TI_READ_URB_RUNNING;
                 urb = tport->tp_port->read_urb;
+                spin_unlock_irqrestore(&tport->tp_lock, flags);
                 urb->complete = ti_bulk_in_callback;
                 urb->context = tport;
                 urb->dev = tport->tp_port->serial->dev;
                 status = usb_submit_urb(urb, GFP_KERNEL);
+        } else  {
+                tport->tp_read_urb_state = TI_READ_URB_RUNNING;
+                spin_unlock_irqrestore(&tport->tp_lock, flags);
         }
-        tport->tp_read_urb_state = TI_READ_URB_RUNNING;
-
-        spin_unlock_irqrestore(&tport->tp_lock, flags);
 
         return status;
 }