From: Krzysztof Halasa <khc@pm.waw.pl>
Date: Wed, 14 Apr 2010 14:09:52 +0000 (+0000)
Subject: WAN: flush tx_queue in hdlc_ppp to prevent panic on rmmod hw_driver.
X-Git-Tag: v2.6.34-rc5~5^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=31f634a63de7068c6a5dcb0d7b09b24b61a5cf88;p=pandora-kernel.git

WAN: flush tx_queue in hdlc_ppp to prevent panic on rmmod hw_driver.

tx_queue is used as a temporary queue when not allowed to queue skb
directly to the hw device driver (which may sleep). Most paths flush
it before returning, but ppp_start() currently cannot. Make sure we
don't leave skbs pointing to a non-existent device.

Thanks to Michael Barkowski for reporting this problem.

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