From: Krzysztof Halasa <khc@pm.waw.pl>
Date: Sun, 12 Dec 2010 12:06:47 +0000 (+0000)
Subject: WAN: Fix a TX IRQ causing BUG() in PC300 and PCI200SYN drivers.
X-Git-Tag: v2.6.37-rc6~14^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eaff9453d3e2b63969af93e9d42a85e803060121;p=pandora-kernel.git

WAN: Fix a TX IRQ causing BUG() in PC300 and PCI200SYN drivers.

We must not wake the TX queue without free TX descriptors.
sca_xmit() expects at least one free descriptor and BUGs otherwise.

Problem reported and fix tested by Bernie Innocenti and Ward Vandewege.

Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
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