From: Alan Cox <alan@xxxxxxxxxxxxxxx>
We want to keep refcounts properly on this against hangup.
Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/tty/serial/mrst_max3110.c | 7 +++++--
1 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/mrst_max3110.c b/drivers/tty/serial/mrst_max3110.c
index 42aa439..1aa2c3c 100644
--- a/drivers/tty/serial/mrst_max3110.c
+++ b/drivers/tty/serial/mrst_max3110.c
@@ -347,7 +347,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
if (!port->state)
return 0;
- tty = port->state->port.tty;
+ tty = tty_port_tty_get(&port->state->port);
if (!tty)
return 0;
@@ -364,8 +364,10 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
}
}
- if (!w)
+ if (!w) {
+ tty_kref_put(tty);
return 0;
+ }
for (r = 0; w; r += usable, w -= usable) {
usable = tty_buffer_request_room(tty, w);
@@ -375,6 +377,7 @@ receive_chars(struct uart_max3110 *max, unsigned short *str, int len)
}
}
tty_flip_buffer_push(tty);
+ tty_kref_put(tty);
return r;
}
--
1.7.7
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