MediaTek has asked to switch from the ISC license to BSD-3-Clause-Clear,
in order to improve clarity and the legal integrity of the code.

The BSD-3-Clause license includes the "no endorsement" clause, which is
important for protecting the reputation of the original authors and
contributors by preventing unauthorized use of their names for endorsement
purposes.

This clause is absent in the BSD-2-Clause license, which is more permissive
but lacks this specific protection.

This change also cleans up the license of some Kconfig/Makefile files,
which were accidentally marked as GPL.

The GPL 2.0 remains in use on mt76x0, as well as two source files in mt7615
for which the license situation still needs to be clarified.

Link: https://patch.msgid.link/20251008104250.46292-2-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Cross-merge networking fixes after downstream PR (net-6.16-rc6-2).

No conflicts.

Adjacent changes:

drivers/net/wireless/mediatek/mt76/mt7925/mcu.c
  c701574c5412 ("wifi: mt76: mt7925: fix invalid array index in ssid assignment during hw scan")
  b3a431fe2e39 ("wifi: mt76: mt7925: fix off by one in mt7925_mcu_hw_scan()")

drivers/net/wireless/mediatek/mt76/mt7996/mac.c
  62da647a2b20 ("wifi: mt76: mt7996: Add MLO support to mt7996_tx_check_aggr()")
  dc66a129adf1 ("wifi: mt76: add a wrapper for wcid access with validation")

drivers/net/wireless/mediatek/mt76/mt7996/main.c
  3dd6f67c669c ("wifi: mt76: Move RCU section in mt7996_mcu_add_rate_ctrl()")
  8989d8e90f5f ("wifi: mt76: mt7996: Do not set wcid.sta to 1 in mt7996_mac_sta_event()")

net/mac80211/cfg.c
  58fcb1b4287c ("wifi: mac80211: reject VHT opmode for unsupported channel widths")
  037dc18ac3fb ("wifi: mac80211: add support for storing station S1G capabilities")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Add a hardware reset method to recover from the SDIO bus error that cannot
be resolved by the current WiFi/BT subsystem reset.

Signed-off-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@mediatek.com>
Link: https://patch.msgid.link/20250418093740.3814909-1-mingyen.hsieh@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Several places use rcu_dereference to get a wcid entry without validating
if the index exceeds the array boundary. Fix this by using a helper function,
which handles validation.

Link: https://patch.msgid.link/20250707154702.1726-1-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Fixes linked list management issues during restart, where sta entries
can be recreated and reinitialized while still in the poll list, triggering
kernel warnings.

Link: https://patch.msgid.link/20241230194202.95065-14-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>

This commit extends the `mt76_connac_mcu_uni_add_dev` function to include
support for Multi-Link Operation (MLO). Additionally, backward
compatibility for MT7921 is preserved, enabling seamless integration with
existing setups.

Fixes: 86c051f2c418 ("wifi: mt76: mt7925: enabling MLO when the firmware supports it")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20241211011926.5002-1-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Extend mt76_connac_mcu_uni_add_dev with per-link BSS configuration.

The patch we created is a prerequisite to enable the MLO function in the
driver. It is purely a refactoring patch so the functionality should
remain unchanged.

We also extend link_idx field in mt76_connac_bss_basic_tlv for the firmware
to able to identify the link index in the MLO mode that is not harmful
for the current non-MLO mode.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20240613030241.5771-6-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

We are introducing a new structure, mt792x_link_sta, to manage per-link
configurations in preparation for future station (STA) support of
Multi-Link Operation (MLO).

This patch only includes structural changes and does not involve any
logic changes.

We have moved relevant parameters, such as the wcid from the mt76_wcid
structure, from the mt7921x_sta structure to the mt792x_link_sta structure.

For current drivers that do not support MLO, there is only one link STA,
and link information is accessed via the deflink member.

However, we have not yet created the per-link BSS configuration indexed
by link ID for Multi-Link Device (MLD) support in mt7921x_sta.
This step needs to be completed before adding MLD support for STA mode.

Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Link: https://patch.msgid.link/20240613030241.5771-3-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

During chip recovery (e.g. chip reset), there is a possible situation that
kernel worker reset_work is holding the lock and waiting for kernel thread
stat_worker to be parked, while stat_worker is waiting for the release of
the same lock.
It causes a deadlock resulting in the dumping of hung tasks messages and
possible rebooting of the device.

This patch prevents the execution of stat_worker during the chip recovery.

Signed-off-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Ming Yen Hsieh <MingYen.Hsieh@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

Since mt7921_skb_add_usb_sdio_hdr is shared between mt7925 and mt7921
drivers, move it in mt792x module.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>