1 files changed, 15 insertions, 5 deletions

diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 077c714f1285..e07b15ed5814 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -410,6 +410,8 @@ static void	usa26_instat_callback(struct urb *urb)
         }
         port = serial->port[msg->port];
         p_priv = usb_get_serial_port_data(port);
+        if (!p_priv)
+                goto resubmit;
 
         /* Update handshaking pin state information */
         old_dcd_state = p_priv->dcd_state;
@@ -420,7 +422,7 @@ static void	usa26_instat_callback(struct urb *urb)
 
         if (old_dcd_state != p_priv->dcd_state)
                 tty_port_tty_hangup(&port->port, true);
-
+resubmit:
         /* Resubmit urb so we continue receiving */
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
@@ -527,6 +529,8 @@ static void	usa28_instat_callback(struct urb *urb)
         }
         port = serial->port[msg->port];
         p_priv = usb_get_serial_port_data(port);
+        if (!p_priv)
+                goto resubmit;
 
         /* Update handshaking pin state information */
         old_dcd_state = p_priv->dcd_state;
@@ -537,7 +541,7 @@ static void	usa28_instat_callback(struct urb *urb)
 
         if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
                 tty_port_tty_hangup(&port->port, true);
-
+resubmit:
                 /* Resubmit urb so we continue receiving */
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
@@ -607,6 +611,8 @@ static void	usa49_instat_callback(struct urb *urb)
         }
         port = serial->port[msg->portNumber];
         p_priv = usb_get_serial_port_data(port);
+        if (!p_priv)
+                goto resubmit;
 
         /* Update handshaking pin state information */
         old_dcd_state = p_priv->dcd_state;
@@ -617,7 +623,7 @@ static void	usa49_instat_callback(struct urb *urb)
 
         if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
                 tty_port_tty_hangup(&port->port, true);
-
+resubmit:
         /* Resubmit urb so we continue receiving */
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
@@ -855,6 +861,8 @@ static void	usa90_instat_callback(struct urb *urb)
 
         port = serial->port[0];
         p_priv = usb_get_serial_port_data(port);
+        if (!p_priv)
+                goto resubmit;
 
         /* Update handshaking pin state information */
         old_dcd_state = p_priv->dcd_state;
@@ -865,7 +873,7 @@ static void	usa90_instat_callback(struct urb *urb)
 
         if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
                 tty_port_tty_hangup(&port->port, true);
-
+resubmit:
         /* Resubmit urb so we continue receiving */
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
@@ -926,6 +934,8 @@ static void	usa67_instat_callback(struct urb *urb)
 
         port = serial->port[msg->port];
         p_priv = usb_get_serial_port_data(port);
+        if (!p_priv)
+                goto resubmit;
 
         /* Update handshaking pin state information */
         old_dcd_state = p_priv->dcd_state;
@@ -934,7 +944,7 @@ static void	usa67_instat_callback(struct urb *urb)
 
         if (old_dcd_state != p_priv->dcd_state && old_dcd_state)
                 tty_port_tty_hangup(&port->port, true);
-
+resubmit:
         /* Resubmit urb so we continue receiving */
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)