Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / drivers / tty / n_gsm.c

diff --git a/kernel/drivers/tty/n_gsm.c b/kernel/drivers/tty/n_gsm.c
index c3fe026..9aff371 100644 (file)
--- a/kernel/drivers/tty/n_gsm.c
+++ b/kernel/drivers/tty/n_gsm.c
@@ -2045,7 +2045,9 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
                }
        }
        spin_unlock(&gsm_mux_lock);
-       WARN_ON(i == MAX_MUX);
+       /* open failed before registering => nothing to do */
+       if (i == MAX_MUX)
+               return;
 
        /* In theory disconnecting DLCI 0 is sufficient but for some
           modems this is apparently not the case. */