Re: [PATCH v5 0/2] genirq/ath12k: fallback to threaded NAPI when IRQ affinity is unavailable

[Hangtian Zhu <hangtian.zhu@oss.qualcomm.com>]

On 5/19/2026 9:07, Hangtian Zhu wrote:
> From: Hangtian Zhu <hangtian.zhu@oss.qualcomm.com>
>
> This series improves ath12k datapath behavior on platforms where the
> effective IRQ path for WLAN MSI interrupts does not support affinity
> setting.
>
> In such setups, DP processing cannot be distributed as intended and can
> become CPU-constrained. The ath12k change switches to threaded NAPI when
> runtime IRQ capability indicates affinity is unavailable.
>
> Patch 1 exports irq_can_set_affinity() for module drivers so they can
> reuse the IRQ core helper instead of open-coding equivalent checks.
>
> Patch 2 uses irq_can_set_affinity() in ath12k PCI to enable threaded NAPI
> for DP interrupt groups only when affinity cannot be set.
>
> On RB3Gen2 with QCC2072, EHT160 UDP downlink throughput improved from
> 802 Mbps to 2.58 Gbps after enabling threaded NAPI.
>
> Tested-on: QCC2072 hw1.0 PCI WLAN.COL.1.0.c2-00074-QCACOLSWPL_V1_TO_SILICONZ-1
>
> Thanks,
> Hangtian Zhu
> ---
> v2: sanity check irq >=0 before irq_can_set_affinity in patch 2
> v1: initial post
>
> Hangtian Zhu (2):
>    genirq: export irq_can_set_affinity() for module drivers
>    wifi: ath12k: enable threaded NAPI when DP IRQ affinity is unavailable
>
>   drivers/net/wireless/ath/ath12k/pci.c | 11 ++++++++++-
>   kernel/irq/manage.c                   |  1 +
>   2 files changed, 11 insertions(+), 1 deletion(-)
>
>
> base-commit: e12d2d3983acb150fd987d19ec6a2a530da110df
ignore this series as wrong patch version, resend with "[RESEND PATCH 
0/2] genirq/ath12k: fallback to threaded NAPI when IRQ affinity is 
unavailable"