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[PATCH 0/2] genirq/ath12k: fallback to threaded NAPI when IRQ affinity is unavailable #595

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[PATCH 0/2] genirq/ath12k: fallback to threaded NAPI when IRQ affinity is unavailable #595

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4f7f3ba
FROMLIST: genirq: export irq_can_set_affinity() for module drivers
zhuhangtian May 12, 2026
3610120
FROMLIST: wifi: ath12k: enable threaded NAPI when DP IRQ affinity is …
zhuhangtian May 12, 2026
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11 changes: 10 additions & 1 deletion drivers/net/wireless/ath/ath12k/pci.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
*/

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/msi.h>
#include <linux/pci.h>
#include <linux/time.h>
Expand Down Expand Up @@ -537,6 +538,8 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab)
int i, j, n, ret, num_vectors = 0;
u32 user_base_data = 0, base_vector = 0, base_idx;
struct ath12k_ext_irq_grp *irq_grp;
bool threaded_napi = false;
int irq;

base_idx = ATH12K_PCI_IRQ_CE0_OFFSET + CE_COUNT_MAX;
ret = ath12k_pci_get_user_msi_assignment(ab, "DP",
Expand All @@ -546,6 +549,10 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab)
if (ret < 0)
return ret;

irq = ath12k_pci_get_msi_irq(ab->dev, base_vector);
if (irq >= 0)
threaded_napi = !irq_can_set_affinity(irq);

for (i = 0; i < ATH12K_EXT_IRQ_GRP_NUM_MAX; i++) {
irq_grp = &ab->ext_irq_grp[i];
u32 num_irq = 0;
Expand All @@ -560,6 +567,8 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab)

netif_napi_add(irq_grp->napi_ndev, &irq_grp->napi,
ath12k_pci_ext_grp_napi_poll);
if (threaded_napi)
netif_threaded_enable(irq_grp->napi_ndev);

if (ab->hw_params->ring_mask->tx[i] ||
ab->hw_params->ring_mask->rx[i] ||
Expand All @@ -578,7 +587,7 @@ static int ath12k_pci_ext_irq_config(struct ath12k_base *ab)
for (j = 0; j < irq_grp->num_irq; j++) {
int irq_idx = irq_grp->irqs[j];
int vector = (i % num_vectors) + base_vector;
int irq = ath12k_pci_get_msi_irq(ab->dev, vector);
irq = ath12k_pci_get_msi_irq(ab->dev, vector);

ab->irq_num[irq_idx] = irq;

Expand Down
1 change: 1 addition & 0 deletions kernel/irq/manage.c
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Original file line number Diff line number Diff line change
Expand Up @@ -159,6 +159,7 @@ int irq_can_set_affinity(unsigned int irq)
{
return __irq_can_set_affinity(irq_to_desc(irq));
}
EXPORT_SYMBOL_GPL(irq_can_set_affinity);

/**
* irq_can_set_affinity_usr - Check if affinity of a irq can be set from user space
Expand Down