On 9 July 2015 at 12:38, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: > On 9 July 2015 at 09:07, Rafał Miłecki <zajec5@xxxxxxxxx> wrote: >> The problem appears when trying to use more than 1 interface. It gets >> created correctly, but setting its MAC fails. It results in wlan0-1 >> having the same MAC as wlan0 and finally having two networks (SSIDs) >> using the same MAC. That obviously doesn't work. >> >> The error I see is: >> brcmfmac: _brcmf_set_mac_address: Setting cur_etheraddr failed, -52 >> with -52 meaning BCME_IE_NOTFOUND. > > I managed to find/guess what exactly BCM43602 firmware rejects. It > doesn't like 2 MAC addresses that differ by the locally administrated > bit only. In my case it was 00:23:6a:a3:7d:95 + 02:23:6a:a3:7d:95. > > When I change MAC addresses to some other combination, e.g.: > 00:23:6a:a3:7d:95 + 00:23:6a:a3:7d:96 > 02:23:6a:a3:7d:95 + 00:23:6a:a3:7d:96 > it works correctly. Oh, it appeared to be more tricky. What BCM43602 firmware doesn't allow is using the same value in the last 2 bits for different BSSes. Few examples: 00:23:6a:a3:7d:90 + 00:23:6a:a3:7d:91 is GOOD 00:23:6a:a3:7d:90 + 00:23:6a:a3:7d:93 is GOOD 00:23:6a:a3:7d:90 + 00:23:6a:a3:7d:94 is BAD (last two bits are 0x0) 00:23:6a:a3:7d:92 + 00:23:6a:a3:7d:9a is BAD (last two bits are 0x2) What's weird, all other numbers can be used as you want: 00:23:6A:A3:7D:90 + 00:7D:A3:6A:23:92 is GOOD -- Rafał -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
