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wifi: rtw88: Use random MAC when efuse MAC invalid

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When the MAC address read from the efuse data is invalid, warn the
user and use a random MAC address instead.

On a device I am currently using (Anbernic RG-ARC) with a rtw8821cs
the efuse appears to be incompletely/improperly programmed. The MAC
address reads as ff:ff:ff:ff:ff:ff. When networkmanager attempts to
initiate a connection (and I haven't hard-coded a MAC address or
set it to random) it fails to establish a connection.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20231208150739.129753-1-macroalpha82@gmail.com
This commit is contained in:
Chris Morgan 2023-12-08 09:07:39 -06:00 committed by Kalle Valo
parent fe0a7776d4
commit 0a999d82b7
1 changed files with 5 additions and 0 deletions
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5
drivers/net/wireless/realtek/rtw88/main.c
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@ -2008,6 +2008,11 @@ static int rtw_chip_efuse_info_setup(struct rtw_dev *rtwdev)
efuse->ext_pa_5g = efuse->pa_type_5g & BIT(0) ? 1 : 0;
efuse->ext_lna_2g = efuse->lna_type_5g & BIT(3) ? 1 : 0;
if (!is_valid_ether_addr(efuse->addr)) {
eth_random_addr(efuse->addr);
dev_warn(rtwdev->dev, "efuse MAC invalid, using random\n");
}
out_disable:
rtw_chip_efuse_disable(rtwdev);