diff options
| author | Krzysztof Halasa <khc@pm.waw.pl> | 2010-04-14 14:09:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-16 15:41:03 -0700 |
| commit | 31f634a63de7068c6a5dcb0d7b09b24b61a5cf88 (patch) | |
| tree | 1bdf1c9f73d692f3a4205464b1cb1dc27b1b3cb4 | |
| parent | 334656f33c43921cf383dfd0220dfd34376bcd98 (diff) | |
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>
| -rw-r--r-- | drivers/net/wan/hdlc_ppp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c index b9b9d6b01c0..941f053e650 100644 --- a/drivers/net/wan/hdlc_ppp.c +++ b/drivers/net/wan/hdlc_ppp.c @@ -628,9 +628,15 @@ static void ppp_stop(struct net_device *dev) ppp_cp_event(dev, PID_LCP, STOP, 0, 0, 0, NULL); } +static void ppp_close(struct net_device *dev) +{ + ppp_tx_flush(); +} + static struct hdlc_proto proto = { .start = ppp_start, .stop = ppp_stop, + .close = ppp_close, .type_trans = ppp_type_trans, .ioctl = ppp_ioctl, .netif_rx = ppp_rx, |