From: Jiajun Wu <b06378@freescale.com>
Date: Mon, 18 Jan 2010 05:47:50 +0000 (+0000)
Subject: ucc_geth: Fix full TX queue processing
X-Git-Tag: v2.6.33-rc6~29^2~28
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34692421bc7d6145ef383b014860f4fde10b7505;p=pandora-kernel.git

ucc_geth: Fix full TX queue processing

commit 7583605b6d29f1f7f6fc505b883328089f3485ad ("ucc_geth: Fix empty
TX queue processing") fixed empty TX queue mishandling, but didn't
account another corner case: when TX queue becomes full.

Without this patch the driver will stop transmiting when TX queue
becomes full since 'bd == ugeth->txBd[txQ]' actually checks for
two things: queue empty or full.

Let's better check for NULL skb, which unambiguously signals an empty
queue.

Signed-off-by: Jiajun Wu <b06378@freescale.com>
Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Stable <stable@vger.kernel.org> [2.6.32]
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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