On Tue, Jan 29, 2019 at 11:30:27AM +0800, YueHaibing wrote:
> >> gpiod = fwnode_get_named_gpiod(&mdiodev->dev.of_node->fwnode,
> >> "reset-gpios", 0, GPIOD_OUT_LOW,
> >> "PHY reset");
> >> - if (PTR_ERR(gpiod) == -ENOENT ||
> >> - PTR_ERR(gpiod) == -ENOSYS)
> >> - gpiod = NULL;
> >> - else if (IS_ERR(gpiod))
> >> - return PTR_ERR(gpiod);
> >> + if (IS_ERR(gpiod)) {
> >> + ret = PTR_ERR(gpiod);
> >> + if (ret == -ENOENT || ret == -ENOSYS)
> >> + gpiod = NULL;
> >> + else
> >> + return ret;
> >> + }
Rule of the thumb: PTR_ERR(p) == -E... is almost always better off
as p == ERR_PTR(-E...)
