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A wcid is added to phy->tx_list whenever either tx_pending or
tx_offchannel becomes non-empty, but the requeue check after a partial
schedule required BOTH queues to be non-empty. When
mt76_txq_schedule_pending_wcid() returns -1 (queue stopped or
MT76_RESET) it leaves frames in tx_pending while tx_offchannel is empty,
so the wcid is dropped from every scheduling list and its frames stall
until the next mt76_tx() for that wcid or wcid cleanup. This strands
EAPOL/mgmt/nullfunc frames under momentary queue-full or across
scan/channel-switch, causing association and 4-way-handshake timeouts.
Requeue when either queue still holds frames, matching the enqueue
condition.
Fixes: 0b3be9d1d34e ("wifi: mt76: add separate tx scheduling queue for off-channel tx")
Link: https://patch.msgid.link/20260722082610.2699628-14-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7996/mt7992 hand the firmware a HW MAC-TXP for AddBA req action frames
(MT_TXD7_MAC_TXD, set in mt7996_mac_write_txwi_80211()), but are otherwise
FW-TXP devices. On tx free mt76_connac_txp_skb_unmap() therefore decodes
the per-frame txp as a struct mt76_connac_fw_txp. For a MAC-TXP the
fw_txp.nbuf byte aliases the AddBA TID word (MT_TXP1_TID_ADDBA), which is
always zero, so the unmap loop runs zero times and the skb DMA mapping in
buf[1] is never unmapped. buf[1].skip_unmap is set unconditionally, so the
generic DMA-ring cleanup skips it as well.
Each AddBA req therefore leaks one TX DMA mapping, roughly one per
(re)association. With WED enabled these mappings are bounced through the
WED swiotlb pool, so under continuous client reconnect churn the pool is
exhausted after ~1-2 days, after which DMA mapping fails for WED, the WiFi
MCU and other on-SoC consumers.
Keep the deferred (token release) unmap that the design relies on, and add
an mt7996-specific txp unmap that inspects MT_TXD7_MAC_TXD and unmaps
buf[1] from the MAC-TXP layout for those frames, delegating to
mt76_connac_txp_skb_unmap() otherwise.
Cc: stable@vger.kernel.org
Fixes: cb6ebbdffef2 ("wifi: mt76: mt7996: support writing MAC TXD for AddBA Request")
Link: https://patch.msgid.link/20260722082610.2699628-13-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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The per-chain response-frame RSSI values are packed one per byte, but the
4th chain was extracted with GENMASK(31, 14) instead of GENMASK(31, 24).
The wrong mask overlaps chains 1-3 and shifts by 14, producing a garbage
chain-3 value that corrupts ack_signal/avg_ack_signal on 4x4 radios.
Extract the correct byte.
Fixes: a71b648e3527 ("wifi: mt76: mt7915: add ack signal support")
Fixes: ea5d99d07fbf ("wifi: mt76: mt7996: enable ack signal support")
Fixes: 67fc7a304bf5 ("wifi: mt76: mt7921: add ack signal support")
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Link: https://patch.msgid.link/20260722082610.2699628-12-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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MT_MDP_DCR0_RX_HDR_TRANS_EN is a field of MT_MDP_DCR0, but monitor-mode
handling applied it to the per-band MT_DMA_DCR0 register instead. As a
result RX header translation was never disabled in the MDP when entering
monitor mode, and an undocumented bit of MT_DMA_DCR0 was toggled. Target
MT_MDP_DCR0, matching the mt7996 driver.
Fixes: b2491018587a ("wifi: mt76: mt7915: fix monitor mode issues")
Link: https://patch.msgid.link/20260722082610.2699628-11-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7996_sta_statistics() set NL80211_STA_INFO_TX_BITRATE unconditionally
after the block that already sets it, so a station with no rate info yet
was reported to userspace with a valid-but-zero TX rate. Drop the
redundant unconditional assignments; the in-block ones are sufficient.
Fixes: b34f346b917e ("wifi: mt76: mt7996: drop return in mt7996_sta_statistics")
Link: https://patch.msgid.link/20260722082610.2699628-10-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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If a peer's VHT/HE MCS map has no supported spatial stream (all fields
0x3), the loop exits with nss == 0 and the function returned (u8)-1 (255),
which was then written into the firmware sta_rec_bf beamforming fields.
Clamp the result to 0.
Fixes: 89029a85482c ("mt76: mt7915: add Tx beamformer support")
Link: https://patch.msgid.link/20260722082610.2699628-9-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7915_remove_interface() cleared the wcid mask bit with no lock held and
before clearing the RCU wcid pointer. The mask is a non-atomic RMW shared
with the allocators, which all run under dev->mt76.mutex; on DBDC the two
wiphys share one mt76_dev, so this raced add_interface/sta_add on the
other band and could leak or double-hand-out a wcid. Clearing the bit
before the RCU pointer also let a concurrent allocation reuse the index
and publish its wcid, which the subsequent NULL assignment then wiped.
Move the clear into the existing mutex section, after the RCU pointer is
cleared.
Fixes: f3049b88b2b3 ("wifi: mt76: mt7915: allocate vif wcid in the same range as stations")
Link: https://patch.msgid.link/20260722082610.2699628-8-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7996_mac_full_reset() called wake_up(&dev->mt76.mcu.wait) without first
setting MT76_MCU_RESET. The MCU response wait condition only checks the
response queue and that bit, so the wake-up released nobody: a thread
blocked in an MCU command against the dead firmware (typically holding
dev->mt76.mutex) stayed asleep until its multi-second timeout, stalling
recovery. Set the bit before the wake-up, as mt7915 does.
Fixes: 27015b6fbcca ("wifi: mt76: mt7996: enable full system reset support")
Link: https://patch.msgid.link/20260722082610.2699628-7-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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band_idx comes from a 2-bit descriptor field (0-3) and was used directly
to index dev->mt76.phys[] (size __MT_MAX_BAND == 3) and dereference the
result. A corrupt or reserved descriptor value could index out of bounds
or hit a NULL phy on parts with fewer bands. Reject invalid band indices,
mirroring mt7996_rx_get_wcid().
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Link: https://patch.msgid.link/20260722082610.2699628-6-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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The link_id in info->control.flags is required by mt7996 to select the
correct mt76_wcid for transmission.
Not assigning the link_id in info->control.flags is equivalent to
assigning the link_id to 0, causing mt7996 to select link_id 0 for
transmission, so probe requests sent on behalf of an MLD vif scanning
via a different link were transmitted with the wrong per-link wcid.
Fixes: 31083e38548f ("wifi: mt76: add code for emulating hardware scanning")
Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
Link: https://patch.msgid.link/20260722082610.2699628-5-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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__mt76_tx_queue_skb() overrides the wcid passed by the driver with
sta->drv_priv, so the wcid might incorrectly be changed after TX,
causing wcid->non_aql_packets to be counted on the wrong wcid. For
example, on the AP side, if a station's setup link is the 5G link and
the station uses 2G to transmit a frame, the value of non_aql_packets
is increased on the 5G wcid but decreased on the 2G wcid. Once the
inflated counter exceeds MT_MAX_NON_AQL_PKT, the TX scheduler
permanently refuses to service the station.
Drop the reassignment and account on the wcid used for transmission.
This also records the actual wcid in the queue entry.
Fixes: e1378e5228aa ("mt76: rely on AQL for burst size limits on tx queueing")
Signed-off-by: Michael-CY Lee <michael-cy.lee@mediatek.com>
Link: https://patch.msgid.link/20260722082610.2699628-4-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Problem:
MCU command timeout while the firmware state is normal, and the
firmware keeps showing the error log "ERROR!! NO PAUSE...".
Root cause:
If the MLD_ID field in the TXD is neither the primary link id nor the
secondary link id, it may lead to a firmware busy loop when the third
link is in power saving mode.
Remap frames directed to a third link to the primary link wcid. Since
TX status events and txfree completions carry the wcid the firmware
saw, use the remapped wcid for packet id tracking and non-AQL packet
accounting as well, while the frame keeps its original link context
for addressing, band and OMAC selection.
Fixes: 85cd5534a3f2 ("wifi: mt76: mt7996: use correct link_id when filling TXD and TXP")
Signed-off-by: Peter Chiu <chui-hao.chiu@mediatek.com>
Link: https://patch.msgid.link/20260722082610.2699628-3-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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For RRO 3.0, RX data released from a RRO data queue should be put to
the indicator queue. The frames are processed and completed in the
context of the indicator queue NAPI, which only polls skbs queued on
the MT_RXQ_RRO_IND list; frames queued under the data queue id are
left sitting on that list until the data queue NAPI happens to run,
stalling and reordering RX data.
Fixes: b1e58e137b61 ("wifi: mt76: mt7996: Introduce RRO MSDU callbacks")
Signed-off-by: Rex Lu <rex.lu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Link: https://patch.msgid.link/20260722082610.2699628-1-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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According to the definition in IEEE Std 802.11be-2024, Table 9-417r:
- If 80 MHz is not supported, bit 1-3 are set to 0.
- If 160 MHz is not supported, bit 2-3 are set to 0.
- If 320 MHz is not supported, bit 3 is set to 0.
Fixes: 348533eb968d ("wifi: mt76: mt7996: add EHT capability init")
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Link: https://patch.msgid.link/20260313062150.3165433-2-shayne.chen@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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The MLO link-reconfiguration rework moved the per-phy num_sta
decrement inside a link_valid guard. link_valid is only set for
MLO links, but num_sta is incremented for every station link,
including the non-MLO deflink. Non-MLO stations bump num_sta
on association and never drop it on removal.
A non-zero num_sta forces connected-mode off-channel scanning which
prevents the directed probe exchange needed to find hidden APs.
Decrement phy->num_sta on the actual link teardown, pairing it with
the unconditional increment on link creation.
Fixes: e8c819df0243 ("wifi: mt76: mt7996: Destroy active sta links in mt7996_mac_sta_remove()")
Signed-off-by: Chad Monroe <chad@monroe.io>
Link: https://patch.msgid.link/20260721185333.2419297-2-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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A non-MLD station's EAPOL and data frames are tagged with link_id ==
IEEE80211_LINK_UNSPECIFIED, which now skips the per-link lookup in
mt7996_mac_write_txwi() and leaves omac_idx/band_idx/wmm_idx at slot
0. When the radio also runs AP VAPs the station's omac is non-zero
(get_omac_idx() prefers HW BSSID slots 1-3), so its EAPOL frames
egress from the wrong BSS and the 4-way handshake times out even
though association succeeds.
In mt7996_tx_prepare_skb(), resolve the link from the peer wcid when
link_id is UNSPECIFIED and the wcid is not the global entry, restoring
the pre-MLO behaviour for station traffic.
Fixes: 729c83a3330c ("wifi: mt76: mt7996: fix reading zeroed info->control.flags after mt76_tx_status_skb_add()")
Signed-off-by: Chad Monroe <chad@monroe.io>
Link: https://patch.msgid.link/20260721185333.2419297-1-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Introduce regulatory wiphy self-managed mode support for MT7921,
allowing the driver to manage its own regulatory domain independently
from the kernel's regulatory framework.
Signed-off-by: Charlie-cy Wu <Charlie-cy.Wu@mediatek.com>
Link: https://patch.msgid.link/20260609065036.577329-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Introduce regulatory wiphy self-managed mode support for MT7925,
allowing the driver to manage its own regulatory domain independently
from the kernel's regulatory framework.
Signed-off-by: Charlie-cy Wu <Charlie-cy.Wu@mediatek.com>
Link: https://patch.msgid.link/20260609065024.577079-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Split mt7921_mcu_regd_update() into two functions to prevent recursive
mutex acquisition. Introduce __mt7921_mcu_regd_update() as the internal
implementation that assumes the mutex is already held by the caller,
while mt7921_mcu_regd_update() remains as the external interface that
handles mutex acquisition and release.
This fixes a deadlock issue when mt7921_regd_set_6ghz_power_type() is
called with the device mutex already held. Without this change, calling
mt7921_mcu_regd_update() would attempt to acquire the same mutex again,
causing a recursive lock deadlock.
The __mt7921_mcu_regd_update() function can be safely called when the
caller has already acquired the device mutex, avoiding the deadlock
while maintaining proper synchronization for regulatory domain updates.
Fixes: e88098133ed4 ("wifi: mt76: mt7921: refactor regulatory notifier flow")
Signed-off-by: Charlie-cy Wu <Charlie-cy.Wu@mediatek.com>
Link: https://patch.msgid.link/20260629083543.153564-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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When tx_prepare_skb() returns an error in the SDIO TX path, the
skb is not freed, leading to a memory leak. This can occur when
zero-length frames (such as WNM NULL frames) are dropped to prevent
potential hardware TX hangs.
Fix this by properly releasing the skb with ieee80211_tx_status_ext()
when tx_prepare_skb() fails.
Fixes: b747fa343817 ("mt76: mt7915: drop zero-length packet to avoid Tx hang")
Signed-off-by: Eason Lai <Eason.Lai@mediatek.com>
Link: https://patch.msgid.link/20260703005945.2244533-1-eason.lai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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The mt7925_tx_power_limit_tlv struct begins with a 4-byte rsv[] field
that acts as a UNI command header prefix. The firmware dispatcher did
not use the 4-byte rsv[] and will only check the payloads after the
4-byte rsv[] As a result, the total message length minus the 4-byte
prefix. Fix this by setting len to msg_len - 4.
Fixes: ccb186326bb6 ("wifi: mt76: mt7925: fix incorrect length field in txpower command")
Signed-off-by: Jared.Huang <jared.huang@mediatek.com>
Link: https://patch.msgid.link/20260617071320.1808499-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Fix the power table update sequence to ensure CLC is loaded before
setting SAR power table.
The firmware requires CLC baseline to be established first
to properly calculate the final power limit as min(clc_limit, rate_limit,sar_limit).
Fixes: 9557b6fe0c8b ("wifi: mt76: mt7925: refine the txpower initialization flow")
Signed-off-by: Jared.Huang <jared.huang@mediatek.com>
Link: https://patch.msgid.link/20260617071305.1808394-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Newer mt7925 firmware uses a shorter WoW pattern TLV with rsv[3]. Select
the v2 layout based on the firmware build date, while keeping the old
layout for older firmware.
This also makes the WoW pattern handling compatible with newer devices
such as MT7928.
Tested-by: Stella Liu <yu-ching.liu@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260615212137.477893-1-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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MT7927 needs monitor interfaces to be passed to the driver as real vifs
so each monitor interface can be configured with its own band context.
This is required to support concurrent 2 GHz and 5 GHz monitor operation
on the same hw.
Keep the existing virtual monitor behavior for older chips.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613225144.2414283-2-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Use the active channel context to select the SNIFFER command band index on
MT7927, and fall back to the PHY chandef when no channel context is
available.
Also pass the same band index to the sniffer channel configuration. This
keeps monitor setup on the correct band, especially when multiple PHY band
contexts are present.
Fixes: 35a5dcc71735 ("wifi: mt76: mt7925: add MT7927 PCIe support")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Tested-by: Devin Wittmayer <lucid_duck@justthetip.ca>
Link: https://patch.msgid.link/20260613225144.2414283-1-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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When an AER error occurs and the bus is hung, the register reads return
0xFFFFFFFF, causing the DMA queue state to be corrupted and resulting in
an invalid memory access when accessing q->desc[] or q->entry[].
Unable to handle kernel paging request at virtual address
ffffffc01099eac0
pc : mt76_dma_add_buf+0x124/0x188 [mt76]
lr : mt76_dma_rx_fill+0x11c/0x1d8 [mt76]
sp : ffffffc016d9bbf0
x29: ffffffc016d9bc10 x28: 0000000000000000
x27: 0000000000000000 x26: ffffffb7855e50b8
x25: ffffffb80d04f000 x24: 0000000000000000
x23: 0000000000000ec0 x22: ffffffb796803648
x21: ffffffb796801f80 x20: ffffffb7968035f8
x19: 0000000000000ec0 x18: 0000000000000000
x17: 000000004ec00000 x16: 000000000ec00000
x15: ffffffc01099eac0 x14: 000000004ec00000
x13: 00000000ffc5a000 x12: ffffffc016d9bc32
x11: 00000000ffffffff x10: 0000000000000002
x9 : 0000000000000000 x8 : 000000000000b4ac
x7 : 0000000000000a20 x6 : ffffffb6c1806400
x5 : 0000000000000000 x4 : ffffffb80d04f000
x3 : 0000000000000000 x2 : 0000000000000001
x1 : 000000000ec04000 x0 : ffffffb7968035f8
Call trace:
mt76_dma_add_buf+0x124/0x188 [mt76 (HASH:1029 4)]
mt76_dma_rx_reset+0xe8/0xfc [mt76 (HASH:1029 4)]
mt7921_wpdma_reset+0x188/0x1b0 [mt7921e (HASH:ee48 5)]
mt7921e_mac_reset+0x128/0x418 [mt7921e (HASH:ee48 5)]
mt7921_mac_reset_work+0xac/0x1a8 [mt7921_common (HASH:f721 6)]
process_one_work+0x188/0x514
worker_thread+0x12c/0x300
kthread+0x140/0x1fc
ret_from_fork+0x10/0x30
Fix the invalid memory access by validating the DMA index read from the
hardware before it is used as a queue index. An out-of-range value, such
as the 0xFFFFFFFF returned while the bus is hung, is now clamped so it can
no longer corrupt q->head or q->tail. In addition, check the bus_hung flag
in mt7921_mac_reset_work() before attempting the reset sequence, reject MCU
messages while the bus is hung, and install no-op bus operations when an
unrecoverable AER error is detected, preventing further invalid hardware
accesses.
Due to hardware limitations - such as the lack of a connected hardware
reset pin or the absence of host re-probe functionality - affected Wi-Fi
devices may not fully recover to a normal operational state after
certain errors, even with AER enabled.
Fixes: 17f1de56df05 ("mt76: add common code shared between multiple chipsets")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Co-developed-by: Jeff Hsu <jeff.hsu@mediatek.com>
Signed-off-by: Jeff Hsu <jeff.hsu@mediatek.com>
Signed-off-by: Eason Lai <Eason.Lai@mediatek.com>
Co-developed-by: Michael Lo <michael.lo@mediatek.com>
Link: https://patch.msgid.link/20260506070458.3096180-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7925 queues mlo_pm_work with a 5 second delay during multi-link
power-save setup and never cancels it on the stop path. If the device is
torn down inside that window, the work outlives the teardown and its timer
fires afterwards, trying to queue onto the workqueue that is already gone:
workqueue: cannot queue mt7925_mlo_pm_work [mt7925_common] on wq phy0
WARNING: kernel/workqueue.c:2283 at __queue_work+0x59/0xa0, CPU#1: swapper/1/0
call_timer_fn+0x2a/0x140
__run_timers+0x203/0x330
run_timer_softirq+0x86/0xf0
mt7921 already has its own stop callback, so add one for mt7925 that
cancels the work before calling mt792x_stop(). mt7925_ops backs both the
PCIe and USB drivers, so this covers both.
Fixes: 276a56883257 ("wifi: mt76: mt7925: update the power-saving flow")
Cc: stable@vger.kernel.org
Tested-by: Traockl <281473483+Traockl@users.noreply.github.com>
Signed-off-by: Devin Wittmayer <lucid_duck@justthetip.ca>
Link: https://patch.msgid.link/20260627202946.25598-1-lucid_duck@justthetip.ca
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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If the device is reset, suspended or unregistered within that window,
the pending work can still run and access vif/bss data that may already
be freed, or send MCU commands while the firmware is not available.
Add cancel_delayed_work_sync(&dev->mlo_pm_work) in all relevant teardown
and suspend paths:
- mt7925_mac_reset_work() (chip reset recovery)
- mt7925e_unregister_device() (PCIe unbind)
- mt7925_pci_suspend() (PCIe bus suspend)
- mt7925_suspend() (mac80211 suspend)
- mt7925u_suspend() (USB bus / runtime suspend)
This ensures the work is stopped before the device state becomes
invalid.
Assisted-by: kimi-cli:kimi-k2.7 code
Assisted-by: atomcode:glm-5.2 #Reported-by
Fixes: 276a568832577 ("wifi: mt76: mt7925: update the power-saving flow")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Link: https://patch.msgid.link/20260630090218.3202029-1-guanwentao@uniontech.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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During device shutdown or removal, a deadlock can occur between the
PCIe remove path and the driver's asynchronous reset work.
The unregistration path calls napi_disable() before cancelling the
reset work. If the reset work runs concurrently, it may re-enable NAPI
and schedule it. Because the device is being unregistered, this can
lead to NAPI state corruption where NAPI is marked as scheduled but
never polled, causing subsequent napi_disable() calls to hang forever.
Fix this by:
1. Moving cancel_work_sync(&dev->reset_work) to the very start of
mt7925e_unregister_device(), ensuring it is stopped before NAPI
is disabled.
2. Setting the MT76_REMOVED flag early in the PCI remove path to
prevent new reset work from being queued.
3. Checking MT76_REMOVED in mt7925_mac_reset_work() and aborting the
reset early if the device is being removed.
Co-developed-by: Fei Shao <fshao@google.com>
Signed-off-by: JB Tsai <jb.tsai@mediatek.com>
Tested-by: Rafael Passos <rafael@rcpassos.me>
Link: https://patch.msgid.link/20260630090610.586954-1-jb.tsai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7925_usb_sdio_tx_prepare_skb() pushes a TX descriptor and a USB
header onto every skb and assumes the headroom for them is already
there. That holds for locally generated traffic, where mac80211
reserves hw->extra_tx_headroom, but forwarded frames are sent through
ieee80211_8023_xmit(), which does not reserve it. Bridge a wired
interface to an mt7925u AP and the first forwarded frame that arrives
short panics the kernel:
skbuff: skb_under_panic: len:415 put:4 tail:0x19b end:0x640 dev:wlan1
kernel BUG at net/core/skbuff.c:212!
Call trace:
skb_panic+0x58/0x60 (P)
skb_push+0x58/0x60
mt7925_usb_sdio_tx_prepare_skb+0xf8/0x1b8 [mt7925_common]
mt76u_tx_queue_skb+0xa0/0x1f8 [mt76_usb]
__mt76_tx_queue_skb+0x54/0xe8 [mt76]
mt76_txq_schedule.part.0+0x204/0x478 [mt76]
mt76_txq_schedule_all+0x50/0x80 [mt76]
mt792x_tx_worker+0x68/0x100 [mt792x_lib]
__mt76_worker_fn+0x84/0x150 [mt76]
Whether a given setup hits it depends on how much headroom the ingress
netdev leaves in its rx skbs. Reproduced on a Raspberry Pi 5 bridging
onboard ethernet to a Netgear A9000; originally reported on an MT7986
router running OpenWrt. Nick Morrow's testing on a Pi 4 (bcmgenet),
which leaves more headroom, helped narrow the trigger to the ingress
path.
The same bug was fixed on mt7921 by commit 98c4d0abf5c4 ("mt76:
mt7921: don't assume adequate headroom for SDIO headers"), but mt7925
was copied from mt7921 without the fix. Add the same guard here.
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Cc: stable@vger.kernel.org
Link: https://github.com/morrownr/mt76/issues/52
Signed-off-by: Devin Wittmayer <lucid_duck@justthetip.ca>
Link: https://patch.msgid.link/20260715023348.59506-1-lucid_duck@justthetip.ca
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Some EcoNet based routers ship an on-flash EEPROM whose chip-id is
0x7592 instead of the expected 0x7603. The device probes as PCI
14c3:7603 and the hardware MT_HW_CHIPID register reports 0x7603,
independent of the EEPROM value.
This is seen across multiple EcoNet EN751221 and EN7528 based devices
(for example the Genexis Platinum 4410).
Signed-off-by: Ahmed Naseef <naseefkm@gmail.com>
Link: https://patch.msgid.link/20260719082530.3879831-1-naseefkm@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Register the mt7915 phy as a thermal zone sensor using
devm_thermal_of_zone_register() so that device tree thermal-zones
nodes can reference the Wi-Fi chip as a temperature source. This
allows the kernel thermal governor to control external cooling
devices such as PWM fans based on Wi-Fi chip temperature.
Registration is non-fatal: -ENODEV is returned when no
thermal-sensors DT property references this device, which is the
expected case on platforms without a thermal zone configured.
Signed-off-by: Ryan Leung <untilscour@protonmail.com>
Link: https://patch.msgid.link/20260719-mt7915-thermal-zone-device-registration-v2-1-0eac68c2741e@protonmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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A use-after-free issue occurs in mt76_rx_poll_complete due to a race
condition. The STA has already been removed, but the rx_status still
had a pointer to the wcid in the STA.
Set the links' wcid pointers to be NULL for a MLD in
mt7925_sta_pre_rcu_remove()
BUG: KASAN: invalid-access in mt76_rx_poll_complete+0x280/0x470
Call trace:
dump_backtrace+0xec/0x128
show_stack+0x18/0x28
dump_stack_lvl+0x40/0xc8
print_report+0x1b8/0x710
kasan_report+0xe0/0x144
do_bad_area+0x120/0x260
do_tag_check_fault+0x20/0x34
do_mem_abort+0x54/0xa8
el1_abort+0x3c/0x5c
el1h_64_sync_handler+0x40/0xcc
el1h_64_sync+0x7c/0x80
mt76_rx_poll_complete+0x280/0x470
mt76_dma_rx_poll+0x114/0x51c
mt792x_poll_rx+0x60/0xf8
napi_threaded_poll_loop+0xe0/0x450
napi_threaded_poll+0x80/0x9c
kthread+0x11c/0x158
ret_from_fork+0x10/0x20
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Eason Lai <Eason.Lai@mediatek.com>
Link: https://patch.msgid.link/20260701010654.956863-1-eason.lai@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7996/mt7992 are single-wiphy, multi-band devices. The driver assigns
each band its own MAC address from a per-band EEPROM entry, or derives
it from the primary band's address when that entry is empty, however
only the primary band's is published as perm_addr. The per-band
addresses are not exposed to cfg80211, so consumers usually fall back
to deriving one from perm_addr.
Store each band's address in wiphy->addresses[], indexed by radio, so
cfg80211 exposes the address the hardware actually uses for that radio.
addresses[0] is the primary band and matches perm_addr, as cfg80211
requires.
Link: https://github.com/openwrt/openwrt/issues/23578
Tested-on: Gemtek W1700K (MT7996)
Signed-off-by: Kenneth Kasilag <kenneth@kasilag.me>
Link: https://patch.msgid.link/20260620013850.3949359-1-kenneth@kasilag.me
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
copy from the address reported by the MCU response (event->addr, a
device-controlled __le32) and clamps only the copy length, never the
destination offset into dev->mt76.eeprom.data. A malicious or
malfunctioning device can report an arbitrary address and drive an
out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past
eeprom.data.
Reject a response whose address would place the copy outside eeprom.data
before deriving the destination pointer. Devices that echo the requested
in-bounds offset are unaffected.
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Link: https://patch.msgid.link/20260625-b4-disp-16f99062-v1-2-aee52ecf61b9@proton.me
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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mt7915_mcu_get_eeprom() copies a fixed EFUSE block into the driver's
dev->mt76.eeprom.data buffer at the offset reported by the MCU response
(res->addr, a device-controlled __le32) without checking it against the
buffer size. A malicious or malfunctioning device can report an arbitrary
address and drive a 16-byte out-of-bounds write past eeprom.data.
Reject a response whose address would place the copy outside eeprom.data
before deriving the destination pointer. Devices that echo the requested
in-bounds offset are unaffected.
Fixes: e57b7901469f ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets")
Cc: stable@vger.kernel.org
Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>
Link: https://patch.msgid.link/20260625-b4-disp-16f99062-v1-1-aee52ecf61b9@proton.me
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
The ownership of sk_buff skb is passed to mt7921_queue_rx_skb, each
path inside it under the switch case handles cleaning of skb and it
is true for mt7921_mcu_rx_event as well.
mt7921_mcu_rx_event, on a success path, either queues skb via
mt76_mcu_rx_event or cleans it immediately inside
mt7921_mcu_uni_rx_unsolicited_event.
However inside mt7921_mcu_rx_event, if skb_linearize fails, the function
returns immediately and never bothers cleaning skb which leaks skb.
Since skb is fully owned at this point, it is safe to call
dev_kfree_skb which fixes the leak.
Granted, the skb_linearize failure is rare as it can only fail under
heavy memory usage, but at the same time, leaking memory under heavy
memory usage can worsen the OOM condition.
Signed-off-by: Prashant Rahul <prashantrahul23@gmail.com>
Link: https://patch.msgid.link/20260716-mt7921-mem-leak-v1-1-6e9c0ea19f63@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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|
Current implementation assumes that the hardware supports DBDC or single
band and binds to band0.
This causes net_fill_forward_path to select the wrong queue for non-DBDC
mt7986 because it binds to band1 and getting the following in dmesg:
ieee80211 phy2: WA: --> drop by reaseon:1, msdu id = 0xc002 but failed!
mtk_wed1: error status=00000002
ieee80211 phy2: WA: txblk
10324e00
len = 128
DW0 : 10 00 00 00
DW1 : 00 00 00 00
DW2 : 00 00 00 00
DW3 : 72 0f 94 68
DW4 : 00 00 00 00
DW5 : ff 03 00 00
DW6 : 00 00 3c 40
DW7 : 00 17 dd 14
DW8 : 79 6f 00 00
DW9 : 02 c0 00 00
DW10 : 58 c5 34 10
DW11 : 00 00 00 00
DW12 : 00 06 3e 00
DW13 : 00 00 00 80
DW14 : 10 8c 00 00
DW15 : 00 00 00 00
DW16 : 00 00 00 00
DW17 : 00 00 00 00
DW18 : 00 00 00 00
DW19 : 00 00 00 00
DW20 : 00 00 00 00
DW21 : 00 00 00 00
DW22 : 00 00 00 00
DW23 : 00 00 00 00
DW24 : 00 00 00 00
DW25 : 00 00 00 00
DW26 : 00 00 00 00
DW27 : 00 00 00 00
DW28 : 00 00 00 00
DW29 : 00 00 00 00
DW30 : 00 00 00 00
DW31 : 00 00 00 00
Fix it by using phy->mt76->band_idx for queue which works for both
non-DBDC and DBDC devices.
Fixes: f68d67623dec ("mt76: mt7915: add Wireless Ethernet Dispatch support")
Suggested-by: Benjamin Larsson <benjamin.larsson@genexis.eu>
Signed-off-by: Zhi-Jun You <hujy652@gmail.com>
Link: https://patch.msgid.link/20260715152113.553-2-hujy652@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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In mt76_wed_init_rx_buf, it's hardcoded to use MT_RXQ_MAIN.
But for non-DBDC MT7986 MT_RXQ_BAND1 is used for RX data queue which
leads to kernel panic when attaching WED.
Use the correct RX queue by checking WED version and band_idx.
v2 and band 1 -> MT_RXQ_BAND1
Others -> MT_RXQ_MAIN
Kernel panic:
Unable to handle kernel access to user memory outside uaccess routines at virtual address 0000000000000000
Mem abort info:
ESR = 0x0000000096000005
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x05: level 1 translation fault
Data abort info:
ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
Internal error: Oops: 0000000096000005 [#1] SMP
CPU: 1 UID: 0 PID: 925 Comm: kmodloader Tainted: G O 6.18.26 #0 NONE
Tainted: [O]=OOT_MODULE
Hardware name: Acer Connect Vero W6m (DT)
pstate: 40400005 (nZcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : page_pool_alloc_frag_netmem+0x1c/0x1bc
lr : page_pool_alloc_frag+0xc/0x34
sp : ffffffc081dab660
x29: ffffffc081dab660 x28: ffffffc081dabc60 x27: ffffff80091af040
x26: 0000008000000000 x25: ffffff80091a8898 x24: ffffff80091a5440
x23: 0000000000001000 x22: 0000000140000000 x21: ffffff80091a2040
x20: ffffff8003f1d780 x19: 0000000000000000 x18: 0000000000000020
x17: ffffffbfbf0ac000 x16: ffffffc080ee0000 x15: ffffff80049d47ca
x14: 000000000000037b x13: 000000000000037b x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
x8 : ffffff8003f1d7c0 x7 : 0000000000000000 x6 : ffffff8003f1d780
x5 : 0000000000000680 x4 : 0000000000000000 x3 : 0000000000002824
x2 : 0000000000000000 x1 : ffffffc081dab71c x0 : 0000000000000000
Call trace:
page_pool_alloc_frag_netmem+0x1c/0x1bc (P)
page_pool_alloc_frag+0xc/0x34
mt76_wed_init_rx_buf+0xf8/0x2ac [mt76]
mtk_wed_start+0x79c/0x12ac
mt7915_dma_start+0x274/0x63c [mt7915e]
mt7915_dma_start+0x5b4/0x63c [mt7915e]
mt7915_dma_init+0x49c/0x81c [mt7915e]
mt7915_register_device+0x24c/0x530 [mt7915e]
mt7915_mmio_probe+0x91c/0x1980 [mt7915e]
platform_probe+0x58/0xa0
really_probe+0xb8/0x2a8
__driver_probe_device+0x74/0x118
driver_probe_device+0x3c/0xe0
__driver_attach+0x88/0x154
bus_for_each_dev+0x60/0xb0
driver_attach+0x20/0x28
bus_add_driver+0xdc/0x200
driver_register+0x64/0x118
__platform_driver_register+0x20/0x30
init_module+0x74/0x1000 [mt7915e]
do_one_initcall+0x4c/0x1f8
do_init_module+0x50/0x210
load_module+0x15f8/0x1b10
__do_sys_init_module+0x1a8/0x260
__arm64_sys_init_module+0x18/0x20
invoke_syscall.constprop.0+0x4c/0xd0
do_el0_svc+0x3c/0xd0
el0_svc+0x18/0x60
el0t_64_sync_handler+0x98/0xdc
el0t_64_sync+0x158/0x15c
Code: aa0003f3 a9025bf5 a90363f7 d2820017 (b9400000)
Signed-off-by: Zhi-Jun You <hujy652@gmail.com>
Link: https://patch.msgid.link/20260715152113.553-1-hujy652@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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|
The default EEPROM firmware is parsed and copied as a full EEPROM
without checking its length. A truncated file can make the driver
read beyond the firmware buffer during variant validation or the
fallback copy.
Reject files shorter than MT7996_EEPROM_SIZE before parsing or
copying the firmware.
Fixes: 98686cd21624 ("wifi: mt76: mt7996: add driver for MediaTek Wi-Fi 7 (802.11be) devices")
Cc: stable@vger.kernel.org
Signed-off-by: Laxman Acharya Padhya <acharyalaxman8848@gmail.com>
Link: https://patch.msgid.link/20260713115412.67095-1-acharyalaxman8848@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
The CLC region is supplied by firmware, but the loader trusts the
region count and each record length. A malformed image can make the
region table pointer precede the firmware buffer, make the record loop
fail to advance, or index phy->clc past its end. Validate the table and
record bounds before dereferencing or copying.
Fixes: 23bdc5d8cadf ("wifi: mt76: mt7921: introduce Country Location Control support")
Signed-off-by: Laxman Acharya Padhya <acharyalaxman8848@gmail.com>
Link: https://patch.msgid.link/CAMyXUJmh=WfwC4_KHupNxYR5e2Gy5QhBDL5TSG6XEW-XLa+X4Q@mail.gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
USB disconnect can leave reset/init work, TX worker, and MCU waiters active
while the device is being removed. Stop those paths before unregistering
the device to avoid teardown waiting on firmware or queue activity after
disconnect.
Run WFSYS reset after USB queue deinit so removal does not issue the reset
while USB traffic may still be queued.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-7-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Configure the USB UDMA TX timeout limit and enable timeout detection
during DMA initialization, matching the vendor driver setup. Use a
longer timeout to avoid false alarms.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-6-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Stop USB UDMA RX/TX and wait for idle before WFSYS reset.
Warn if the engine remains busy.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-5-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Mark the mt792x USB bus hung on the first control timeout and switch
register access to no-op bus ops. Each failed vendor request may spend
up to MT_VEND_REQ_MAX_RETRY * MT_VEND_REQ_TOUT_MS, about 3 seconds, and
teardown/reset paths can keep issuing such requests after the device has
stopped responding.
Also skip the USB WFSYS reset path after bus_hung is set, since it uses
UHW vendor requests as well.
mt7925u 1-2:1.3: vendor request req:63 off:0018 failed:-110
mt7925u 1-2:1.3: vendor request req:63 off:0018 failed:-110
mt7925u 1-2:1.3: vendor request req:63 off:0018 failed:-110
mt7925u 1-2:1.3: vendor request req:63 off:0018 failed:-110
mt7925u 1-2:1.3: vendor request req:63 off:0018 failed:-110
Avoid repeating those register reads after the bus is known to be hung by
switching register access to no-op handlers.
Fixes: 0d2afe09fad5 ("mt76: mt7921: add mt7921u driver")
Fixes: c948b5da6bbe ("wifi: mt76: mt7925: add Mediatek Wi-Fi7 driver for mt7925 chips")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-4-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
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Skip mt7925 reset handling once the bus is marked hung.
A hung bus cannot be recovered by issuing another device reset. Continuing
the reset path may only send more failing MCU or register accesses and
delay teardown. Return early from reset work and the USB reset path so the
failed device can be torn down quickly.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-3-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
Stop retrying hardware init once the bus is marked hung.
The control path is no longer usable at that point, so more retries only
issue failing device accesses, including MCU commands or register
operations, and delay teardown. Exit early and let the failed device be
torn down quickly.
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Link: https://patch.msgid.link/20260613224131.2396026-2-sean.wang@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
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mt76_switch_vif_chanctx()
When performing channel switches on different radios within a short
timeframe, channel contexts with different bands can be carried for
each struct ieee80211_vif_chanctx_switch.
Rework mt76_switch_vif_chanctx() to properly handle this scenario.
Fixes: 82334623af0c ("wifi: mt76: add chanctx functions for multi-channel phy support")
Co-developed-by: Rex Lu <rex.lu@mediatek.com>
Signed-off-by: Rex Lu <rex.lu@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Link: https://patch.msgid.link/20260720090102.190729-1-shayne.chen@mediatek.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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The SKB containing the generated beacon is not freed when the beacon
queue is deected stuck and scheduled for recovery.
Fixes potential memory leaks in case the beacon queue is detected stuck.
Signed-off-by: David Bauer <mail@david-bauer.net>
Link: https://patch.msgid.link/20260611215658.259324-1-mail@david-bauer.net
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
A small piece of code in mt7996.h depends on CONFIG_MTK_DEBUG, which
has never been defined in the kernel. Remove this dead code.
Discovered while searching for CONFIG_* symbols referenced in code but
not defined in any Kconfig file.
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://patch.msgid.link/20260610041050.206950-1-enelsonmoore@gmail.com
Signed-off-by: Felix Fietkau <nbd@nbd.name>
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