tree 1bdf1c9f73d692f3a4205464b1cb1dc27b1b3cb4
parent 334656f33c43921cf383dfd0220dfd34376bcd98
author Krzysztof Halasa <khc@pm.waw.pl> 1271254192 +0000
committer David S. Miller <davem@davemloft.net> 1271457663 -0700

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>