netdev - Re: [PATCH net-next 2/5] net: dsa: b53: Make SRAB driver manage port interrupts

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 4 Sep 2018 16:46:59 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev@...r.kernel.org, vivien.didelot@...oirfairelinux.com,
        davem@...emloft.net
Subject: Re: [PATCH net-next 2/5] net: dsa: b53: Make SRAB driver manage port
 interrupts

On 09/04/2018 03:59 PM, Andrew Lunn wrote:
>> +static irqreturn_t b53_srab_port_isr(int irq, void *dev_id)
>> +{
>> +	struct b53_srab_port_priv *port = dev_id;
>> +	struct b53_device *dev = port->dev;
>> +	struct b53_srab_priv *priv = dev->priv;
>> +
>> +	/* Acknowledge the interrupt */
>> +	writel(BIT(port->num), priv->regs + B53_SRAB_INTR);
>> +
>> +	schedule_work(&port->irq_work);
>> +
>> +	return IRQ_HANDLED;
>> +}
>> +
>> +static int b53_srab_irq_enable(struct b53_device *dev, int port)
>> +{
>> +	struct b53_srab_priv *priv = dev->priv;
>> +	struct b53_srab_port_priv *p = &priv->port_intrs[port];
>> +	int ret;
>> +
>> +	ret = request_irq(p->irq, b53_srab_port_isr, 0,
>> +			  dev_name(dev->dev), p);
> 
> Hi Florian
> 
> Could you use a threaded interrupt? Save you from having to implement
> your own work queue. I think you can have a function called in both
> interrupt context in order to acknowledged the interrupt, and thread
> context to do the remaining work.

Indeed, this works nicely actually, thanks for the suggestion.
-- 
Florian