netdevice pc300: Add the reason about PC300 BROKEN in Kconfig

When compile test my previous patch, I found PC300 driver was broken.
And there is no explanation about the broken.
Add the reason about why change this driver to broken in Kconfig.

Signed-off-by: Wang Chen <wangchen@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 21efd99b9294..0725161aa27c 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -207,6 +207,8 @@ config PC300
         tristate "Cyclades-PC300 support (RS-232/V.35, X.21, T1/E1 boards)"
         depends on HDLC && PCI && BROKEN
         ---help---
+          This driver is broken because of struct tty_driver change.
+
           Driver for the Cyclades-PC300 synchronous communication boards.
 
           These boards provide synchronous serial interfaces to your