USB: serial: io_edgeport: fix memory leaks in probe error path

URBs and buffers allocated in attach for Epic devices would never be
deallocated in case of a later probe error (e.g. failure to allocate
minor numbers) as disconnect is then never called.

Fix by moving deallocation to release and making sure that the
URBs are first unlinked.

Fixes: f9c99bb8b3a1 ("USB: usb-serial: replace shutdown with disconnect,
release")
Cc: stable <stable@vger.kernel.org>	# v2.6.31
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index edd568bc0de5c914c4a6bf06c6b713c5636ca6bb..11c05ce2f35f8cd8ffe1ea46b0f6b0fed83e5064 100644 (file)
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -2959,16 +2959,9 @@ static void edge_disconnect(struct usb_serial *serial)
 {
        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
 
-       /* stop reads and writes on all ports */
-       /* free up our endpoint stuff */
        if (edge_serial->is_epic) {
                usb_kill_urb(edge_serial->interrupt_read_urb);
-               usb_free_urb(edge_serial->interrupt_read_urb);
-               kfree(edge_serial->interrupt_in_buffer);
-
                usb_kill_urb(edge_serial->read_urb);
-               usb_free_urb(edge_serial->read_urb);
-               kfree(edge_serial->bulk_in_buffer);
        }
 }
 
@@ -2981,6 +2974,16 @@ static void edge_release(struct usb_serial *serial)
 {
        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
 
+       if (edge_serial->is_epic) {
+               usb_kill_urb(edge_serial->interrupt_read_urb);
+               usb_free_urb(edge_serial->interrupt_read_urb);
+               kfree(edge_serial->interrupt_in_buffer);
+
+               usb_kill_urb(edge_serial->read_urb);
+               usb_free_urb(edge_serial->read_urb);
+               kfree(edge_serial->bulk_in_buffer);
+       }
+
        kfree(edge_serial);
 }