Fast channel switching

Hi All

Iam a student and am trying to incorporate fast channel switching in madwifi
for my project. Currently as measured the time for execution of the function
ath_set_channel for madwifi_0.9.4_trunkr3314 is about 20ms (as tested on
Mikrotik RB433AH board running openwrt kamikaze v8.09). However for the
later releases with HAL code (madwifi_0.9.4_r3980 and later), we have
measured the execution time for the same function to be about 4-5ms. Also we
have noticed that there is a function for AR5212 chipset,
ar5212ChannelChange(), whose execution time as measured is about 500
microseconds.

However our problem is that we are not able to make madwifi_0.9.4_r3980 or
later release (till latest r4119) work on Mikrotik RB433AH boards (employing
Openwrt kamikaze v8.09). We have been able to compile the latest madwifi
release on Openwrt, but when modules load, the following error message keeps
appearing

wifi0 ath_fatal_tasklet hardware error resetting

Morever we have already incorporated quite a few changes in
madwifi_0.9.4_trunkr3314 and it will be difficult for us to port these
changes to latest madwifi release. So would it be possible to make use of
the function ar5212ChannelChange() in madwifi_0.9.4_trunkr3314. What changes
will we need to make for that?? We tried to implement the function
ar5212ChannelChange() in madwifi_0.9.4_trunkr3314 ourselves, but have not
been successfull so far.

Any help or suggestion would be greatly appreciated.

Thanks
Vishal 
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