USB: adding comment for ipaq forcing number of ports

The reason for forcing a number of ports should be documented.

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index 5e15dec9f315..d9fb3768a2d7 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -570,6 +570,11 @@ static struct usb_serial_driver ipaq_device = {
         .description =          "PocketPC PDA",
         .usb_driver =           &ipaq_driver,
         .id_table =             ipaq_id_table,
+        /*
+         * some devices have an extra endpoint, which
+         * must be ignored as it would make the core
+         * create a second port which oopses when used
+         */
         .num_ports =            1,
         .open =                 ipaq_open,
         .close =                ipaq_close,