linux-kernel - Re: [PATCH] staging: rtl8188eu: remove spaces, correct counts to unbreak P2P ioctls

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Date:	Tue, 25 Mar 2014 19:04:34 +0000
From:	Wilfried Klaebe <w-lkml@...enslange-mailadresse.de>
To:	Greg KH <gregkh@...uxfoundation.org>
Cc:	Larry.Finger@...inger.net, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8188eu: remove spaces, correct counts to
 unbreak P2P ioctls

Am Tue, Mar 25, 2014 at 11:51:45AM -0700 schrieb Greg KH:
> On Tue, Mar 25, 2014 at 06:36:18PM +0000, Wilfried Klaebe wrote:
> > Am Tue, Mar 25, 2014 at 11:17:49AM -0700 schrieb Greg KH:
> > > On Tue, Mar 25, 2014 at 05:59:39PM +0000, Wilfried Klaebe wrote:
> > > > staging: rtl8188eu: remove spaces, correct counts to unbreak P2P ioctls
> > > > 
> > > > It looks like someone did a search-and-replace on that driver, putting
> > > > spaces before "=" characters, without checking this is OK everywhere.
> > > > Also, in some places, there's memcpm()s/strncmp()s checking for some
> > > > different length than the fixed string argument.
> > > > 
> > > > These things result in code not working as intended. Fix that.
> > > 
> > > What code is parsing string output from the kernel?
> > 
> > I know about some userspace apps, for example a MiraCast Sink
> > implementation for the Raspberry Pi, called piracast.
> > 
> > This patch though is about the rtl8188eu driver parsing strings
> > handed to it via "iwpriv wlanX p2p_set name=value". Which breaks,
> > because the driver checks for "name =" instead of "name=" in several
> > cases.
> 
> That's horrid on so many levels...

The real WTF is: why doesn't this driver use the stuff already there for
Wi-Fi Direct (aka P2P Wifi)?

But well, for now I just wanted to contribute my fixes to this obvious
breakage; making a sensible driver out of that mess is a longer-term
project.

Regards,
Wilfried

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