svn commit: r257133 - head/sys/dev/iwn

[Stefan Farfeleder]

On Fri, Oct 25, 2013 at 07:44:54PM +0000, Adrian Chadd wrote:
> Author: adrian
> Date: Fri Oct 25 19:44:53 2013
> New Revision: 257133
> URL: http://svnweb.freebsd.org/changeset/base/257133
> 
> Log:
>   Temporarily disable multi-rate retry (link quality) and eliminate rate
>   index lookups.
>   
>   * My recent(ish) change to iwn(4) and the net80211 rate control API to
>     support 11n rates broke the link quality table use.  So, until I or
>     someone else decides to fix it, let's just disable it for now.
>   
>   * Teach iwn_tx_data_raw() to use the iwn_rate_to_plcp() function.
>   
>   * Eliminate two uses of the net80211 rate index lookup functions - they
>     are only for legacy rates and they're not needed here.
>   
>   This fixes some invalid looking rate control TX issues that showed up
>   on my 4965 but it doesn't fix the two TX hangs I've noticed. Those look
>   like DMA related issues.
>   
>   Tested:
>   
>   * 4965, STA mode
>   * 5100, STA mode

Hi Adrian,

this change completely broke iwn for me. It's a

iwn0: <Intel WiFi Link 5100> mem 0xf1ffe000-0xf1ffffff irq 17 at device 0.0 on pci12

built-in device in a Dell Precision m4400.

With this change, wpa_supplicant cannot associate any longer. In the
logs I see every few seconds

Oct 27 10:57:37 mole wpa_supplicant[2256]: wlan0: Trying to associate with xx:xx:xx:xx:xx:xx (SSID='xx' freq=2427 MHz)
Oct 27 10:57:47 mole wpa_supplicant[2256]: wlan0: Authentication with xx:xx:xx:xx:xx:xx timed out.
Oct 27 10:57:47 mole wpa_supplicant[2256]: wlan0: CTRL-EVENT-DISCONNECTED bssid=xx:xx:xx:xx:xx:xx reason=3 locally_generated=1

If I revert just this revision based on a r257155 checkout, it works
again.

Stefan