From: Krzysztof Halasa 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-Url: https://git.stricted.de/?a=commitdiff_plain;h=31f634a63de7068c6a5dcb0d7b09b24b61a5cf88;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/wan/hdlc_ppp.c b/drivers/net/wan/hdlc_ppp.c index b9b9d6b01c0b..941f053e650e 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,