lkml.org 
[lkml]   [2015]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH RFC] wext: Add event stream wrappers that return E2BIG when values don't fit
On 01/29/2015 03:22 PM, Johannes Berg wrote:

> > What you mean is "with the wext (compatibility) code in cfg80211".

Comment fixed in the v2 of the patch (coming shortly).

> > Either way, I *strongly* recommend against using this in the first
> > place. There's an upper bound of 64k (I think) on the amount of memory
> > that can be used, and people have been known to run into this limit - at
> > which point you get absolutely no scan results back whatsoever. It's far
> > safer to use nl80211's scan dump, and if you're looking at this code in
> > particular then clearly you have it available.

Agreed, and we will be switching to nl80211 as soon as we can.

> > Regarding the patch itself, it seems to add a bit much code. Is there
> > really no better way to express this? Perhaps by checking that the
> > stream actually moved forward - which will *always* happen for any of
> > these functions if they actually did anything? Even maybe if the new
> > _check inlines were to do that it'd still make the code smaller.

I've shuffled some things around and will submit the v2 momentarily.


Thanks,
James



\
 
 \ /
  Last update: 2015-02-19 22:41    [W:0.710 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site