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wifi: ath12k: preserve PPDU state across monitor status buffers

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A monitor PPDU may span multiple status buffers. However,
__ath12k_wifi7_dp_mon_process_ring() clears mon_ppdu_info before
processing every buffer.

As a result, continuation buffers lose PPDU state collected from
earlier buffers, including ppdu_id and PHY metadata.

This can cause monitor RX processing to fail when
ath12k_wifi7_dp_rx_mon_dest_process() observes a PPDU ID mismatch
between status and destination rings, preventing MSDUs from being
delivered. It can also produce incomplete EHT metadata that triggers
warnings from mac80211:
	Rate marked as an EHT rate but data is invalid: MCS:0, NSS:0

ath12k_wifi7_dp_mon_srng_process() already tracks status TLV
continuations via ppdu_continuation. Apply the same logic here and
only reinitialize mon_ppdu_info when starting a new PPDU.

mon_ppdu_info persists across ar->monitor_started transitions. If
monitor mode stops while a PPDU is mid-continuation, ppdu_continuation
stays set and could leak into the next monitor session. Reset it
when monitor mode starts.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3

Fixes: 78d3d907d0 ("wifi: ath12k: add support to reap and process monitor status ring")
Signed-off-by: Kang Yang <kang.yang@oss.qualcomm.com>
Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Tamizh Chelvam Raja <tamizh.raja@oss.qualcomm.com>
Link: https://patch.msgid.link/20260828065534.1537-1-kang.yang@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>
This commit is contained in:
Kang Yang 2026-08-28 14:55:34 +08:00 • committed by Jeff Johnson
commit 69b2d06daf
2 changed files with 21 additions and 9 deletions
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