wifi: ath12k: add the missing RCU lock in ath12k_dp_tx_free_txbuf()

Browse source

RCU read lock is missing in ath12k_dp_tx_free_txbuf() before calling
ath12k_dp_to_pdev_dp(), causing below warning:

WARNING: suspicious RCU usage
-----------------------------
drivers/net/wireless/ath/ath12k/dp.h:653 ath12k dp to dp pdev called without rcu lock!
Call Trace:
 <IRQ>
 show_stack
 dump_stack_lvl
 dump_stack
 lockdep_rcu_suspicious.cold
 ath12k_dp_tx_free_txbuf
 ath12k_wifi7_dp_tx_completion_handler
 ath12k_wifi7_dp_service_srng
 ath12k_pci_ext_grp_napi_poll
 [...]
 </IRQ>

Invoke guard(rcu) to fix it.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3

Signed-off-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>
Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@oss.qualcomm.com>
Link: https://patch.msgid.link/20251119-ath12k-fix-missing-rcu-lock-v1-1-8155de1dc4fc@oss.qualcomm.com
Signed-off-by: Jeff Johnson <jeff.johnson@oss.qualcomm.com>

...

This commit is contained in:

Baochen Qiang 2025-11-19 10:15:57 +08:00 • committed by Jeff Johnson

parent 7cd7392a07

commit 5a384854d8

1 changed files with 4 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

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

View file