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Re: [PATCH] wifi: wilc1000: Set MAC after operation mode

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On 10/3/24 2:32 PM, Alexis Lothoré wrote:
Hello Marek,

Hi,

On 9/26/24 21:52, Marek Vasut wrote:
It seems it is necessary to set WILC MAC address after operation mode,
otherwise the MAC address of the WILC MAC is reset back to what is in
nvmem. This causes a failure to associate with AP after the WILC MAC
address was overridden by userspace.

Test case:
"
ap$ cat << EOF > hostap.conf
interface=wlan0
ssid=ssid
hw_mode=g
channel=6
wpa=2
wpa_passphrase=pass
wpa_key_mgmt=WPA-PSK
EOF
ap$ hostapd -d hostap.conf
ap$ ifconfig wlan0 10.0.0.1
"

"
sta$ ifconfig wlan0 hw ether 00:11:22:33:44:55
sta$ wpa_supplicant -i wlan0 -c <(wpa_passphrase ssid pass)
sta$ ifconfig wlan0 10.0.0.2
sta$ ping 10.0.0.1 # fails without this patch
"

AP still indicates SA with original MAC address from nvmem without this patch:
"
nl80211: RX frame da=ff:ff:ff:ff:ff:ff sa=60:01:23:45:67:89 bssid=ff:ff:ff:ff:ff:ff ...
                                           ^^^^^^^^^^^^^^^^^
"

Good catch, thanks for the fix. I tracked a bit the issue history and it seems
to have been introduced by my recent change about reading the mac address early
from the chip nvmem (to set correctly mac address reported to userspace once net
device has been registered). I indeed reproduce the issue, and reverting the
commit below makes it disappear, so the following can be added:

Fixes: 83d9b54ee5d4 ("wifi: wilc1000: read MAC address from fuse at probe")

Signed-off-by: Marek Vasut <marex@xxxxxxx>

Tested-by: Alexis Lothoré <alexis.lothore@xxxxxxxxxxx>
Nice, thanks !




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