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rt2x00: use RESET state bit to prevent IV changes on restart

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We can not set IV when we are under reset. Previously we read previous
IV value from registers and zeroed IV registers when key was deleted,
but this could possibly not work if DEL_KEY command was not performed.

Now when we have ->reconfig_complete ops and we fully mark mac80211
reset state via DEVICE_STATE_RESET flag, we can just skip setting IV
when keys are set during reset.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Stanislaw Gruszka 2019-11-28 10:11:24 +01:00 committed by Kalle Valo
parent 57f9807d1e
commit 2d52378a0a
1 changed files with 9 additions and 12 deletions
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21
drivers/net/wireless/ralink/rt2x00/rt2800lib.c
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@ -1652,20 +1652,17 @@ static void rt2800_config_wcid_attr_cipher(struct rt2x00_dev *rt2x00dev,
rt2800_register_write(rt2x00dev, offset, reg);
}
if (test_bit(DEVICE_STATE_RESET, &rt2x00dev->flags))
return;
offset = MAC_IVEIV_ENTRY(key->hw_key_idx);
if (crypto->cmd == SET_KEY) {
rt2800_register_multiread(rt2x00dev, offset,
&iveiv_entry, sizeof(iveiv_entry));
if ((crypto->cipher == CIPHER_TKIP) ||
(crypto->cipher == CIPHER_TKIP_NO_MIC) ||
(crypto->cipher == CIPHER_AES))
iveiv_entry.iv[3] |= 0x20;
iveiv_entry.iv[3] |= key->keyidx << 6;
} else {
memset(&iveiv_entry, 0, sizeof(iveiv_entry));
}
memset(&iveiv_entry, 0, sizeof(iveiv_entry));
if ((crypto->cipher == CIPHER_TKIP) ||
(crypto->cipher == CIPHER_TKIP_NO_MIC) ||
(crypto->cipher == CIPHER_AES))
iveiv_entry.iv[3] |= 0x20;
iveiv_entry.iv[3] |= key->keyidx << 6;
rt2800_register_multiwrite(rt2x00dev, offset,
&iveiv_entry, sizeof(iveiv_entry));
}