wifi: ath12k: protect new_alpha2 access with base_lock

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ab->new_alpha2 is written under ab->base_lock by the 11d new country
code event handler ath12k_reg_11d_new_cc_event() and by the SMBIOS
BDF parser, and read under the same lock by ath12k_update_11d().

ath12k_mac_hw_register() however read ab->new_alpha2 without holding
base_lock, racing with those writers. Take base_lock and copy the
value into a local wmi_set_current_country_arg, mirroring what
ath12k_update_11d() already does, and use the local copy afterwards.

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-v1-3-504aa6e7e93c@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

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Baochen Qiang 2026-07-29 15:18:13 +08:00 • committed by Jeff Johnson

parent af8d103b2b

commit 04497f2a77

1 changed files with 9 additions and 2 deletions

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

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