From add477df674db00377d9a4dc0d9b553ce79bc06d Mon Sep 17 00:00:00 2001 From: Olivier Blin Date: Fri, 8 Aug 2008 12:01:11 -0700 Subject: [PATCH] hso: fix oops in read/write callbacks The tty may be closed already when the read/write callbacks are called. This patch checks that the ttys still exist before waking them up. Signed-off-by: Olivier Blin Acked-by: Alan Cox Cc: Jari Tenhunen Signed-off-by: Greg Kroah-Hartman Signed-off-by: Jeff Garzik --- drivers/net/usb/hso.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 031d07b105af..94a27f764e6b 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1467,7 +1467,8 @@ static void hso_std_serial_write_bulk_callback(struct urb *urb) return; } hso_put_activity(serial->parent); - tty_wakeup(serial->tty); + if (serial->tty) + tty_wakeup(serial->tty); hso_kick_transmit(serial); D1(" "); @@ -1538,7 +1539,8 @@ static void ctrl_callback(struct urb *urb) clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags); } else { hso_put_activity(serial->parent); - tty_wakeup(serial->tty); + if (serial->tty) + tty_wakeup(serial->tty); /* response to a write command */ hso_kick_transmit(serial); } -- 2.20.1