wifi: ath12k: use per-radio ab in ath12k_mac_hw_register()

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In ath12k_mac_hw_register() the local 'ab' is fetched once from the first
radio, i.e. ath12k_ah_to_ar(ah, 0)->ab. When an ath12k_hw spans more than
one ath12k_base, the radios walked by for_each_ar() may belong to
different ath12k_base instances. Using the function-scope 'ab' inside
that loop then refers to the first radio's device, which is stale with
respect to the ar being processed.

This is not a functional problem currently: the loop only dereferences the
stale 'ab' under hw_params->current_cc_support, which is set only for
WCN7850 and QCC2072. Both devices expose a single radio per ath12k_hw, so
'ab' and ar->ab always point to the same ath12k_base.

Still, relying on that is fragile. Cache ar->ab into a per-iteration
'this_ab' and use it for the country code programming and the log messages
so that each radio is handled against its own ath12k_base regardless of how
many radios an ath12k_hw spans.

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

Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>
Link: https://patch.msgid.link/20260729-ath12k-regd-wait-timeout-v1-2-504aa6e7e93c@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

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Baochen Qiang 2026-07-29 15:18:12 +08:00 • committed by Jeff Johnson

parent f2576dc0f8

commit af8d103b2b

1 changed files with 7 additions and 5 deletions

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drivers/net/wireless/ath/ath12k/mac.c

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