[PATCH 1/3] net: lpc_eth: Replace WARN() trace with simple pr_warn()

[David Miller]

From: Roland Stigge <stigge at antcom.de>
Date: Mon, 11 Jun 2012 10:03:11 +0200

> A WARN() trace indicating a "BUG!" was identified as a "normal" case in the
> xmit function in case all TX descriptors are occupied already. In this case,
> NETDEV_TX_BUSY is returned, nothing buggy at all.
> 
> Signed-off-by: Roland Stigge <stigge at antcom.de>
> Tested-by: Alexandre Pereira da Silva <aletes.xgr at gmail.com>

This is not normal.

Read the comment above this code you are changing.  If we are
out of TX descriptors, the queue must be stopped, and therefore
if the queue is stopped this transmit method should not be
invoked.

It is a hard error condition, should never occur, and indicates
a very serious error condition in the driver.