[PATCH ath-next] wifi: ath12k: skip MLO multicast links during crash recovery in Tx path

[Baochen Qiang]

On 7/23/2026 1:46 PM, Pavankumar Nandeshwar wrote:
> In ath12k_wifi7_mac_op_tx(), the MLO multicast broadcast path iterates
> over all active links and copies the original skb for transmission on
> each link. When firmware crash recovery is underway (ATH12K_FLAG_CRASH_FLUSH
> set), the per-link copy is allocated and partially processed before
> ath12k_wifi7_dp_tx() eventually rejects it with -ESHUTDOWN.
> 
> This wastes GFP_ATOMIC memory and produces spurious "failed to transmit
> frame" warnings for every active MLO link during the recovery window.
> The unicast and non-MLO paths are unaffected: they call ath12k_wifi7_dp_tx()
> directly, which already guards against the flag at its entry.
> 
> Skip any link whose associated ath12k_base has ATH12K_FLAG_CRASH_FLUSH set
> before performing the skb_copy(), matching the behaviour of
> ath12k_wifi7_dp_tx() but avoiding the unnecessary allocation entirely.
> 
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.6-01243-QCAHKSWPL_SILICONZ-1
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
> 
> Signed-off-by: Pavankumar Nandeshwar <pavankumar.nandeshwar at oss.qualcomm.com>

Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>