tree f082a966a82ebc803f1f4d7cfccf057b3b0a8017
parent d1a3b7377d3b6a01ec5f70adb32173b13233aabf
author Matt Carlson <mcarlson@broadcom.com> 1311776452 +0000
committer David S. Miller <davem@davemloft.net> 1311831572 -0700

tg3: Add tx BD budgeting code

As the driver breaks large skb fragments into smaller submissions to the
hardware, there is a new danger that BDs might get exhausted before all
fragments have been mapped.  This patch adds code to make sure tx BDs
aren't oversubscribed and flag the condition if it happens.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>