netdev - Re: [PATCH net-next v14 02/13] rtase: Implement the .ndo

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Date: Tue, 12 Dec 2023 10:49:55 +0100
From: Paolo Abeni <pabeni@...hat.com>
To: Justin Lai <justinlai0215@...ltek.com>, kuba@...nel.org
Cc: davem@...emloft.net, edumazet@...gle.com, linux-kernel@...r.kernel.org, 
 netdev@...r.kernel.org, andrew@...n.ch, pkshih@...ltek.com,
 larry.chiu@...ltek.com
Subject: Re: [PATCH net-next v14 02/13] rtase: Implement the .ndo_open
 function

On Fri, 2023-12-08 at 17:47 +0800, Justin Lai wrote:
> +static int rtase_open(struct net_device *dev)
> +{
> +	struct rtase_private *tp = netdev_priv(dev);
> +	struct rtase_int_vector *ivec = &tp->int_vector[0];
> +	const struct pci_dev *pdev = tp->pdev;
> +	int ret;
> +	u16 i;
> +
> +	rtase_set_rxbufsize(tp);
> +
> +	ret = rtase_alloc_desc(tp);
> +	if (ret)
> +		goto err_free_all_allocated_mem;
> +
> +	ret = rtase_init_ring(dev);
> +	if (ret)
> +		goto err_free_all_allocated_mem;
> +
> +	rtase_hw_config(dev);
> +
> +	if (tp->sw_flag & SWF_MSIX_ENABLED) {
> +		ret = request_irq(ivec->irq, rtase_interrupt, 0,
> +				  dev->name, ivec);
> +
> +		/* request other interrupts to handle multiqueue */
> +		for (i = 1; i < tp->int_nums; i++) {
> +			if (ret)
> +				continue;
> +
> +			ivec = &tp->int_vector[i];
> +			if (ivec->status != 1)
> +				continue;
> +
> +			snprintf(ivec->name, sizeof(ivec->name), "%s_int%i", tp->dev->name, i);
> +			ret = request_irq(ivec->irq, rtase_q_interrupt, 0,
> +					  ivec->name, ivec);

It looks like that if the above request_irq fails you will never free 
tp->int_vector[0].irq (and all tp->int_vector[j].irq, for j < i)


Cheers,

Paolo