nRF7002DK, Set region return no error on wrong country code but after 10s

[Nicolas Brunner]

With NCS 3.4.1, I'm calling ret = net_mgmt(NET_REQUEST_WIFI_REG_DOMAIN, iface, &regd, sizeof(regd)); but if the country code is invalid, the function return after 10s but with no error code.

If i look into the code, the timeout should be 2s but an error make it divide by 20 and multiply by 100:
https://github.com/nrfconnect/sdk-nrf/blob/b20f8619ba9a5530f8c34b0a130d829947cfe55d/drivers/wifi/nrf71/osal/fw_if/umac_if/inc/common/fmac_cmd_common.h#L19
https://github.com/nrfconnect/sdk-nrf/blob/b20f8619ba9a5530f8c34b0a130d829947cfe55d/drivers/wifi/nrf71/osal/fw_if/umac_if/src/common/fmac_api_common.c#L151
https://github.com/nrfconnect/sdk-nrf/blob/b20f8619ba9a5530f8c34b0a130d829947cfe55d/drivers/wifi/nrf71/osal/fw_if/umac_if/src/common/fmac_api_common.c#L231

https://github.com/zephyrproject-rtos/nrf_wifi/blob/fc0872109ec4c006d32843a202b129db33cf16b9/fw_if/umac_if/inc/common/fmac_cmd_common.h#L19
https://github.com/zephyrproject-rtos/nrf_wifi/blob/fc0872109ec4c006d32843a202b129db33cf16b9/fw_if/umac_if/src/common/fmac_api_common.c#L555
https://github.com/zephyrproject-rtos/nrf_wifi/blob/fc0872109ec4c006d32843a202b129db33cf16b9/fw_if/umac_if/src/common/fmac_api_common.c#L635

Can the nRF7002 return an error instead of not returning anything ?
Can the net_mgmt() return an error code in case of timeout ?
Can nordicsemi provide the list of supported country code ? So i can test myself and return quickly in case of invalid country code

[Nicolas Brunner]

List of valid country code:
https://nrfconnectdocs.nordicsemi.com/ncs/latest/nrf/protocols/wifi/regulatory_support.html#wifi-regulatory-channel-rules

static const char *const valid_country_codes[] = {
    /* Group 1 */
    "AD", "AL", "AT", "BA", "BE", "BG", "CH", "CY", "CZ", "DE",
    "DK", "EE", "ES", "FI", "FR", "GR", "HU", "IE", "IS", "IT",
    "LI", "LT", "LU", "LV", "MC", "MD", "ME", "MK", "MT", "NL",
    "NO", "PL", "PT", "RO", "SE", "SI", "SK",
    /* Group 2 */
    "AF", "AI", "AN", "AW", "BL", "BT", "BY", "ET", "GF", "GL",
    "GP", "KH", "LS", "MF", "MQ", "MR", "MW", "OM", "PF", "PM",
    "RE", "SA", "SR", "TD", "VC", "WF", "WS", "YT", "ZW",
    /* Group 3 */
    "AE", "AR", "BF", "CF", "CI", "CO", "GH", "HN", "JM", "LB",
    "LK", "MX", "PE", "PG", "RW", "SN", "TH", "TT", "VN", "VU",
    /* Group 4 */
    "AS", "BM", "FM", "HT", "MH", "MP", "NI", "PW", "VI",
    /* Group 5 */
    "BS", "CX", "KY", "MN", "MU", "PY", "TC", "UG",
    /* Countries (A to D) */
	"DZ", "AM", "AU", "AZ", "BH", "BD", "BB", "BZ", "BO", "BR",
	"BN", "CA", "CL", "CN", "CR", "HR", "CU", "DM", "DO",
	/* Countries (E to J) */
	"EC", "EG", "GE", "GD", "GU", "GT", "GY", "HK", "IN", "ID",
	"IR", "IL", "JP", "JO",
	/* Countries (K to R) */
	"KZ", "KE", "KP", "KR", "KW", "MO", "MY", "MV", "MA", "NP",
	"NZ", "NG", "PK", "PA", "PH", "PR", "QA", "RU",
	/* Countries (S to Z) */
	"KN", "LC", "SV", "RS", "SG", "ZA", "SY", "TW", "TZ", "TG",
	"TN", "TR", "UA", "GB", "US", "UY", "UZ", "VE", "YE",
};