Re: [PATCH v5] wifi: ath11k: fix resource leak on error in ext IRQ setup

[Jeff Johnson]

On 7/22/2026 6:38 PM, ZhaoJinming wrote:
> @@ -585,9 +598,7 @@ static int ath11k_ahb_config_ext_irq(struct ath11k_base *ab)
>  				}
>  			}
>  		}
> -		irq_grp->num_irq = num_irq;
> -
> -		for (j = 0; j < irq_grp->num_irq; j++) {
> +		for (j = 0; j < num_irq; j++) {
>  			int irq_idx = irq_grp->irqs[j];
>  
>  			irq = platform_get_irq_byname(ab->pdev,
> @@ -600,11 +611,23 @@ static int ath11k_ahb_config_ext_irq(struct ath11k_base *ab)

my review agent noted in inconsistency between this logic and the CE IRQ logic

just above here, after the platform_get_irq_byname() in the prior chunk, is
the assignment:
			ab->irq_num[irq_idx] = irq;

that assignment takes place before the request_irq() function is called and
error checked

in the CE IRQ logic (see below) the assignment doesn't take place until after
the request_irq() function is called and error checked. so consider relocating
that assignment to after the if block below
>  			if (ret) {
>  				ath11k_err(ab, "failed request_irq for %d\n",
>  					   irq);
> +				irq_grp->num_irq = j;
> +				ath11k_ahb_free_ext_irq_grp(ab, irq_grp);
> +				goto err_request_irq;
>  			}

so assign here?

>  		}
> +
> +		irq_grp->num_irq = num_irq;
>  	}
>  
>  	return 0;
> +
> +err_request_irq:
> +	for (i--; i >= 0; i--) {
> +		irq_grp = &ab->ext_irq_grp[i];
> +		ath11k_ahb_free_ext_irq_grp(ab, irq_grp);
> +	}
> +	return ret;
>  }
>  
>  static int ath11k_ahb_config_irq(struct ath11k_base *ab)
> @@ -629,16 +652,24 @@ static int ath11k_ahb_config_irq(struct ath11k_base *ab)
>  		ret = request_irq(irq, ath11k_ahb_ce_interrupt_handler,
>  				  IRQF_TRIGGER_RISING, irq_name[irq_idx],
>  				  ce_pipe);
> -		if (ret)
> +		if (ret) {
> +			ath11k_err(ab, "failed request_irq for %d\n", irq);
> +			ath11k_ahb_free_ce_irqs(ab, i);
>  			return ret;
> +		}
>  
>  		ab->irq_num[irq_idx] = irq;

note here the assignment takes place only when request_irq() is successful

>  	}
>  
>  	/* Configure external interrupts */
>  	ret = ath11k_ahb_config_ext_irq(ab);
> +	if (ret) {
> +		ath11k_err(ab, "failed to configure ext irq: %d\n", ret);
> +		ath11k_ahb_free_ce_irqs(ab, ab->hw_params.ce_count);
> +		return ret;
> +	}
>  
> -	return ret;
> +	return 0;
>  }
>  
>  static int ath11k_ahb_map_service_to_pipe(struct ath11k_base *ab, u16 service_id,