mac80211: backport an upstream patch needed by mt76 for AES_GMAC key support

Signed-off-by: Felix Fietkau <[email protected]>

package/kernel/mac80211/patches/subsys/333-wifi-mac80211-extend-IEEE80211_KEY_FLAG_GENERATE_MMI.patch

@@ -0,0 +1,70 @@
+From: Michael-CY Lee <[email protected]>
+Date: Tue, 26 Mar 2024 08:30:36 +0800
+Subject: [PATCH] wifi: mac80211: extend IEEE80211_KEY_FLAG_GENERATE_MMIE to
+ other ciphers
+
+Extend the flag IEEE80211_KEY_FLAG_GENERATE_MMIE to BIP-CMAC-256,
+BIP-GMAC-128 and BIP-GMAC-256 for the same reason and in the same
+way that the flag was added originally in commit a0b4496a4368
+("mac80211: add IEEE80211_KEY_FLAG_GENERATE_MMIE to ieee80211_key_flags").
+
+Signed-off-by: Michael-CY Lee <[email protected]>
+Link: https://msgid.link/[email protected]
+Signed-off-by: Johannes Berg <[email protected]>
+---
+
+--- a/include/net/mac80211.h
++++ b/include/net/mac80211.h
+@@ -2032,8 +2032,8 @@ static inline bool lockdep_vif_mutex_hel
+  *	@IEEE80211_KEY_FLAG_GENERATE_MMIC on the same key.
+  * @IEEE80211_KEY_FLAG_NO_AUTO_TX: Key needs explicit Tx activation.
+  * @IEEE80211_KEY_FLAG_GENERATE_MMIE: This flag should be set by the driver
+- *	for a AES_CMAC key to indicate that it requires sequence number
+- *	generation only
++ *	for a AES_CMAC or a AES_GMAC key to indicate that it requires sequence
++ *	number generation only
+  */
+ enum ieee80211_key_flags {
+ 	IEEE80211_KEY_FLAG_GENERATE_IV_MGMT	= BIT(0),
+--- a/net/mac80211/wpa.c
++++ b/net/mac80211/wpa.c
+@@ -882,7 +882,8 @@ ieee80211_crypto_aes_cmac_256_encrypt(st
+ 
+ 	info = IEEE80211_SKB_CB(skb);
+ 
+-	if (info->control.hw_key)
++	if (info->control.hw_key &&
++	    !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
+ 		return TX_CONTINUE;
+ 
+ 	if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
+@@ -898,6 +899,9 @@ ieee80211_crypto_aes_cmac_256_encrypt(st
+ 
+ 	bip_ipn_set64(mmie->sequence_number, pn64);
+ 
++	if (info->control.hw_key)
++		return TX_CONTINUE;
++
+ 	bip_aad(skb, aad);
+ 
+ 	/* MIC = AES-256-CMAC(IGTK, AAD || Management Frame Body || MMIE, 128)
+@@ -1027,7 +1031,8 @@ ieee80211_crypto_aes_gmac_encrypt(struct
+ 
+ 	info = IEEE80211_SKB_CB(skb);
+ 
+-	if (info->control.hw_key)
++	if (info->control.hw_key &&
++	    !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
+ 		return TX_CONTINUE;
+ 
+ 	if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
+@@ -1043,6 +1048,9 @@ ieee80211_crypto_aes_gmac_encrypt(struct
+ 
+ 	bip_ipn_set64(mmie->sequence_number, pn64);
+ 
++	if (info->control.hw_key)
++		return TX_CONTINUE;
++
+ 	bip_aad(skb, aad);
+ 
+ 	hdr = (struct ieee80211_hdr *)skb->data;