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Date: Wed, 18 Nov 2020 14:59:16 +0100 From: Martin Schiller <ms@....tdt.de> To: andrew.hendry@...il.com, davem@...emloft.net, kuba@...nel.org, xie.he.0141@...il.com Cc: linux-x25@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Martin Schiller <ms@....tdt.de> Subject: [PATCH net-next v3 3/6] net/lapb: handle carrier loss correctly In case of carrier loss, clear all queues, enter state LABB_STATE_0 and stop all timers. By setting rc = LAPB_NOTCONNECTED, the upper layer is informed about the disconnect. Signed-off-by: Martin Schiller <ms@....tdt.de> --- net/lapb/lapb_iface.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/net/lapb/lapb_iface.c b/net/lapb/lapb_iface.c index 8dd7c420ae93..017bc169c334 100644 --- a/net/lapb/lapb_iface.c +++ b/net/lapb/lapb_iface.c @@ -303,6 +303,18 @@ int lapb_disconnect_request(struct net_device *dev) if (!lapb) goto out; + if (!netif_carrier_ok(dev)) { + lapb_dbg(0, "(%p) Carrier lost!\n", lapb->dev); + lapb_dbg(0, "(%p) S%d -> S0\n", lapb->dev, lapb->state); + lapb_clear_queues(lapb); + lapb->state = LAPB_STATE_0; + lapb->n2count = 0; + lapb_stop_t1timer(lapb); + lapb_stop_t2timer(lapb); + rc = LAPB_NOTCONNECTED; + goto out_put; + } + switch (lapb->state) { case LAPB_STATE_0: rc = LAPB_NOTCONNECTED; -- 2.20.1
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