On Mon, Jul 08, 2019 at 09:42:43AM -0700, Tejun Heo wrote: > On Wed, Jul 03, 2019 at 10:07:49AM +0800, Peng Wang wrote: > > We could only handle the case that css exists > > and css_try_get_online() fails. > > As css_tryget_online() can't handle NULL input, this is a bug fix. > Can you please clarify that in the description? - if (!css || !css_tryget_online(css)) + if (css && !css_tryget_online(css)) If css == NULL, !css is true, and the second part of the || statement will not be evaluated. So it's not a bug fix. Thanks!