[NET]: Document ->hard_start_xmit() locking in netdevices.txt

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/Documentation/networking/netdevices.txt b/Documentation/networking/netdevices.txt
index 1509f3aff968..3c0a5ba614d7 100644
--- a/Documentation/networking/netdevices.txt
+++ b/Documentation/networking/netdevices.txt
@@ -51,6 +51,8 @@ dev->hard_start_xmit:
         set_multicast_list
         Context: BHs disabled
         Notes: netif_queue_stopped() is guaranteed false
+               Interrupts must be enabled when calling hard_start_xmit.
+                (Interrupts must also be enabled when enabling the BH handler.)
         Return codes: 
         o NETDEV_TX_OK everything ok. 
         o NETDEV_TX_BUSY Cannot transmit packet, try later