After opening and closing the file /dev/ipoctal.X.Y.Z for the second time, it gives a kernel oops due to a dereference of a NULL pointer. The problem was that tty->driver_data was not properly initialized when accessing the file for the second time. Reported-by: Alberto Garcia Gonzalez <agarcia@xxxxxxxxxx> Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@xxxxxxxxxx> --- drivers/staging/ipack/devices/ipoctal.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c index a5af423..a1aae40 100644 --- a/drivers/staging/ipack/devices/ipoctal.c +++ b/drivers/staging/ipack/devices/ipoctal.c @@ -114,8 +114,6 @@ static int ipoctal_port_activate(struct tty_port *port, struct tty_struct *tty) ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].u.w.cr, CR_ENABLE_RX); - tty->driver_data = ipoctal; - return 0; } @@ -136,6 +134,8 @@ static int ipoctal_open(struct tty_struct *tty, struct file *file) if (atomic_read(&ipoctal->open[channel])) return -EBUSY; + tty->driver_data = ipoctal; + res = tty_port_open(&ipoctal->tty_port[channel], tty, file); if (res) return res; -- 1.7.10.4 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/devel
