lkml.org 
[lkml]   [2015]   [May]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RESEND][PATCH] Bluetooth: Make request workqueue freezable
At Tue, 19 May 2015 10:26:46 -0400 (EDT),
Alan Stern wrote:
>
> > > > Of just have request_firmware()
> > > > actually sleep until userspace is ready. Seriously, why is
> > > > request_firmware not just sleeping for us.
>
> It won't work. The request_firmware call is part of the probe
> sequence, which in turn is part of the resume sequence. Userspace
> doesn't start running again until the resume sequence is finished. If
> request_firmware waited for userspace, it would hang.

Note that the recent request_firmware() doesn't need the user-space
invocation (unless the fallback is explicitly enabled) but loads the
file directly. And, request_firmware() for the cached data is valid
to be called in the resume path.


Takashi


\
 
 \ /
  Last update: 2015-05-19 20:01    [W:0.829 / U:0.096 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site