when host_roaming=1, who performs the passive scan, firmware or driver?

[zhangyanfeng]

The "Prism driver programmers mannual" mentions that When setcnfRoamingMode to 2 ( I think it is realized with the command "iwpriv wlan0 host_roaming 1, right?), the host will be interrupted with a ScanResults Info Frame when either the PRISM MAC scans or the host initiates a scan, then the host may issue a Join Request at that time. Therefore how to control PRISM MAC or the host to perform the scan?  Another relative question, after debuging the driver with Printk or PDEBUG, I find that the function "hostap_passive_scan" never can be performed, although I set the host_roaming mode to 0,1 or 2 (I perform the debug by adding a line ---  PDEBUG(DEBUG_EXTRA, "begin passive scan \n"); just at the begin of the function "hostap_passive_scan" , but from the dmesg result, it never has been outputed. 

Anyone'any warm suggestion will be welcomed very much 



Best Regards,
 
---------------------------------------------------------
Zhang Yanfeng 
NEC Labaratories, China
 
E-mail: zhangyanfeng at research.nec.com.cn
Tel:    +86-10-62705962-210
Fax:    +86-10-62705994
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