From 59299aa1028fce051adbd25aaff7c387b865cd6d Mon Sep 17 00:00:00 2001 From: Marc Dionne Date: Fri, 30 Mar 2018 21:04:44 +0100 Subject: rxrpc: Fix resend event time calculation Commit a158bdd3 ("rxrpc: Fix call timeouts") reworked the time calculation for the next resend event. For this calculation, "oldest" will be before "now", so ktime_sub(oldest, now) will yield a negative value. When passed to nsecs_to_jiffies which expects an unsigned value, the end result will be a very large value, and a resend event scheduled far into the future. This could cause calls to stall if some packets were lost. Fix by ordering the arguments to ktime_sub correctly. Fixes: a158bdd3247b ("rxrpc: Fix call timeouts") Signed-off-by: Marc Dionne Signed-off-by: David Howells --- net/rxrpc/call_event.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/rxrpc') diff --git a/net/rxrpc/call_event.c b/net/rxrpc/call_event.c index 3dee89c7a06e..6e0d788b4dc4 100644 --- a/net/rxrpc/call_event.c +++ b/net/rxrpc/call_event.c @@ -226,7 +226,7 @@ static void rxrpc_resend(struct rxrpc_call *call, unsigned long now_j) ktime_to_ns(ktime_sub(skb->tstamp, max_age))); } - resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(oldest, now))); + resend_at = nsecs_to_jiffies(ktime_to_ns(ktime_sub(now, oldest))); resend_at += jiffies + rxrpc_resend_timeout; WRITE_ONCE(call->resend_at, resend_at); -- cgit v1.2.3-59-g8ed1b