Bug 16201

Summary:	SIOCGIWFREQ ioctl fails to get frequency info
Product:	Networking	Reporter:	nuh (nuh)
Component:	Wireless	Assignee:	networking_wireless (networking_wireless)
Status:	CLOSED INSUFFICIENT_DATA
Severity:	normal	CC:	lenik, linville, maciej.rutecki, rjw
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.35-rc3 2.6.35-rc2	Subsystem:
Regression:	Yes	Bisected commit-id:
Bug Depends on:
Bug Blocks:	16055

Description nuh 2010-06-14 10:45:44 UTC

Since 2.6.35 calling ioctl(x, SIOCSIWFREQ, &z) for getting the frequency the card is set onto fails, regardless of the driver.

works fine in 2.6.34.

Comment 1 nuh 2010-06-14 10:47:04 UTC

Whoops i means GIWFREQ not SIWFREQ of course...

Comment 2 John W. Linville 2010-06-14 14:26:53 UTC

What is the device you are using?  Perhaps you could post the source code with your ioctl call as well?

Comment 3 Rafael J. Wysocki 2010-07-23 20:01:22 UTC

On Friday, July 23, 2010, John W. Linville wrote:
> On Fri, Jul 23, 2010 at 01:47:29PM +0200, Rafael J. Wysocki wrote:
> > This message has been generated automatically as a part of a summary report
> > of recent regressions.
> > 
> > The following bug entry is on the current list of known regressions
> > from 2.6.34.  Please verify if it still should be listed and let the
> tracking team
> > know (either way).
> > 
> > 
> > Bug-Entry   : http://bugzilla.kernel.org/show_bug.cgi?id=16201
> > Subject             : SIOCGIWFREQ ioctl fails to get frequency info
> > Submitter   : nuh <nuh@mailinator.net>
> > Date                : 2010-06-14 10:45 (40 days old)
> 
> No response for the submitter, no reproducer -- I think it should be closed.

Comment 4 lenik 2010-12-26 05:10:20 UTC

I have the same problem while using RTL8187 wifi adapter. It worked flawlessly before, and now it fails to report the frequency info. When I run airodump-ng (v1.1), it reports the problem as "fixed channel mon0: -1", where "-1" is the error value from wi_get_channel(), which relies on SIOCGIWFREQ in linux_get_channel().