regulatory_hint — driver hint to the wireless core a regulatory domain
|struct wiphy * wiphy,|
|const char * alpha2|
the wireless device giving the hint (used only for reporting conflicts)
the ISO/IEC 3166 alpha2 the driver claims its regulatory domain
should be in. If
rd is set this should be NULL. Note that if you
set this to NULL you should still set rd->alpha2 to some accepted
Wireless drivers can use this function to hint to the wireless core what it believes should be the current regulatory domain by giving it an ISO/IEC 3166 alpha2 country code it knows its regulatory domain should be in or by providing a completely build regulatory domain. If the driver provides an ISO/IEC 3166 alpha2 userspace will be queried for a regulatory domain structure for the respective country.
Drivers should check the return value, its possible you can get an -ENOMEM.