due to unlucky timing of beacon timer configuration (which we try to avoid) and
due to unlucky timing of local TSF updates (triggered by the reception of a
beacon with the same BSSID - something we can't avoid) the beacon timers (we
have 4) can be updated seperately, leaving one of them in the past, not beeing
updated until the timers wrap around. due to the fact that the beacon interval
does not fit into the timer period (16 bit) a whole number of times the size of
the ATIM window can get bigger than desired (we don't use ATIM right now so the
window size should always be 1).
this results in a phaenome described as "ramping" (ticket #1154) which is
actually a transmission delay, since the hardware is not allowed to transmit
data in the ATIM period.
the problem is described and discussed in length at
http://thread.gmane.org/gmane.linux.drivers.madwifi.devel/6066
since we don't know of a way to disable ATIM alltogether, the following adds
some workarounds to this problem:
1.) disable interrupts in timing critical function ath_beacon_config
2.) stop beacons before reconfiguring them
3.) check ATIM window after critical code which might have changed the timers
3a.) beacon configuration
3b.) reception of a beacon with the same BSSID. the hardware will have updated
the local TSF and this might have left one of the beacon timers in the past.
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3867 0192ed92-7a03-0410-a25b-9323aeb14dbd
av_beacon_alloc should be unsigned long, not unsigned int to match
signatures of bitmask manupulation functions on i386.
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3856 0192ed92-7a03-0410-a25b-9323aeb14dbd
AR2424 and AR2425 share the same PCI ID. Probing AR2425 with HAL that
doesn't support it is problematic. It causes an unhandled NMI and puts
the device to a non-functional state. After that, even HAL that
supports AR2425 won't be able to use the device until the system is
rebooted.
Reject AR2425 devices if HAL doesn't positively indicate support for
them.
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3825 0192ed92-7a03-0410-a25b-9323aeb14dbd
Instead of simply alternating antenna, send multicast frames out each antenna
based on the proportion of sucessfully transmitted unicast frames. This helps
in situations where one antenna is significantly better than another.
Signed-off-by: Perry Lorier <perry@cs.waikato.ac.nz>
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3776 0192ed92-7a03-0410-a25b-9323aeb14dbd
This fixes a bug when renaming multiple wireless cards on slow devices.
The pci registration causes udev to rename the device but the sysctl is
not registered yet so the device renames but the corresponding sysctl
entries are not renamed.
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3746 0192ed92-7a03-0410-a25b-9323aeb14dbd
use of strncat (my bad) and needlessly complicated the debug
output with prefixes.
Thanks, Pavel! :-)
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3738 0192ed92-7a03-0410-a25b-9323aeb14dbd
* Tidy, including refactoring and variable rename for clarity and consistency
* Move some variable initialisation out of sysctl register where it does not belong.
* Only change antenna based on RX traffic if both diversity and an RX antenna is not set
* Set HW/HAL diversity setting on HW/HAL reset
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3717 0192ed92-7a03-0410-a25b-9323aeb14dbd
Remove kbuild by-products in regression/Makefile. Also allow
regression/tkip/test_tkip.c to compile (too few arguments to function
ieee80211_crypto_demic).
Closes: #1973
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3699 0192ed92-7a03-0410-a25b-9323aeb14dbd
* Convert last SKB_CB()->ni to SKB_NI
* Lots of comments
* Refactor various pieces of code for consistency, readability, and removal of goto
git-svn-id: http://madwifi-project.org/svn/madwifi/trunk@3666 0192ed92-7a03-0410-a25b-9323aeb14dbd
