On Fri, Aug 02, 2019 at 10:04:10AM +0000, Schrempf Frieder wrote: > From: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> > > As it is allowed to use the mctrl_gpio_* functions before > initialization (as the 8250 driver does according to 434be0ae7aa7), Actually I was surprised some time ago that 8250 used serial_mctrl without first initializing it and expecting it to work. I didn't look in detail, but I wouldn't go so far to call this "allowed". The commit itself calls it "workaround" which seems a better match. > it seems appropriate to have a NULL check in all of the functions. > Otherwise the mctrl_gpio_to_gpiod() function is prone to be used > in a context that can lead to a NULL pointer dereference. > > Signed-off-by: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx> Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |
