Re: [BUG] scans can still hang with -EBUSY on iwl3945

[Maxim Levitsky <maximlevitsky@gmail.com>]

On Fri, 2009-05-01 at 08:58 -0700, reinette chatre wrote:
> Maxim,
> 
> On Fri, 2009-05-01 at 05:00 -0700, Maxim Levitsky wrote:
> > Don't know if this is new regression, or just exposed race condition,
> > but currently using rfkill, and/or s2disk sometimes leaves the card in
> > state in which it can't scan.
> 
> Could you please provide more details of this scenario? 

OK, lets focus on my current setup:

* iwlwifi.git - very close to current head, yesterday HEAD
* disable_hw_scan=1 - this bug is present regardless of this setting,
yet this rules out firmware interactions during rfkill.

* Network Manager - ubuntu 9.04 unmodified.
* wpa_supplicant - close to git HEAD, with one local change:
  It is known that on first attempt scans always fail, with same -EBUSY
  iwlst scan shows 'Device is busy', supplicant complains about scan
requested (ret=-1), ... When this happens supplicant waits for 10
seconds, and I reduced that wait to 1 second.


When this happens, I can't make the card scan, scans always fail, and I
can only reload the module.

Best regards,
	Maxim Levitsky