gpiolib: check for parent device in devprop_gpiochip_set_names()

It's possible for a GPIO chip to not have a parent device (whose
properties we inspect for 'gpio-line-names'). In this case we should
simply return from devprop_gpiochip_set_names(). Add an appropriate
check for this use-case.

Fixes: 7cba1a4d5e16 ("gpiolib: generalize devprop_gpiochip_set_names() for device properties")
Reported-by: Anders Roxell <[email protected]>
Signed-off-by: Bartosz Golaszewski <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Tested-by: Anders Roxell <[email protected]>
Reviewed-by: Mika Westerberg <[email protected]>

0 files changed, 0 insertions, 0 deletions