DCB: fix kconfig option

Since the netlink option for DCB is necessary to actually be useful,
simplified the Kconfig option.  In addition, added useful help text for the
Kconfig option.

Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 7 deletions

diff --git a/net/dcb/Kconfig b/net/dcb/Kconfig
index bdf38802d339..4066d59c8de5 100644
--- a/net/dcb/Kconfig
+++ b/net/dcb/Kconfig
@@ -1,12 +1,22 @@
 config DCB
-        tristate "Data Center Bridging support"
-
-config DCBNL
-        bool "Data Center Bridging netlink interface support"
-        depends on DCB
+        bool "Data Center Bridging support"
         default n
         ---help---
-          This option turns on the netlink interface
-          (dcbnl) for Data Center Bridging capable devices.
+          This enables support for configuring Data Center Bridging (DCB)
+          features on DCB capable Ethernet adapters via rtnetlink.  Say 'Y'
+          if you have a DCB capable Ethernet adapter which supports this
+          interface and you are connected to a DCB capable switch.
+
+          DCB is a collection of Ethernet enhancements which allow DCB capable
+          NICs and switches to support network traffic with differing
+          requirements (highly reliable, no drops vs. best effort vs. low
+          latency) to co-exist on Ethernet.
+
+          DCB features include:
+            Enhanced Transmission Selection (aka Priority Grouping) - provides a
+              framework for assigning bandwidth guarantees to traffic classes.
+            Priority-based Flow Control (PFC) - a MAC control pause frame which
+              works at the granularity of the 802.1p priority instead of the
+              link (802.3x).
 
           If unsure, say N.