lkml.org 
[lkml]   [2019]   [Jan]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH net-next] mdio_bus: Fix PTR_ERR() usage after initialization to constant
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...)

\
 
 \ /
  Last update: 2019-02-01 05:25    [W:0.059 / U:13.952 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site