Re: [PATCH] Add PM support to sis900 network driver

[Andrew Morton <akpm@osdl.org>]

Daniele Venzano <webvenza@libero.it> wrote:
>
> The attached patch adds support for suspend/resume to the sis900 driver.

...

> +static int sis900_suspend(struct pci_dev *pci_dev, u32 state)
>  +{
>  +	struct net_device *net_dev = pci_get_drvdata(pci_dev);
>  +	struct sis900_private *sis_priv = net_dev->priv;
>  +	long ioaddr = net_dev->base_addr;
>  +	unsigned long flags;
>  +
>  +	if(!netif_running(net_dev))
>  +		return 0;
>  +	netif_stop_queue(net_dev);
>  +	
>  +	netif_device_detach(net_dev);
>  +	spin_lock_irqsave(&sis_priv->lock, flags);
>  +
>  +	/* Stop the chip's Tx and Rx Status Machine */
>  +	outl(RxDIS | TxDIS | inl(ioaddr + cr), ioaddr + cr);
>  +	
>  +	pci_set_power_state(pci_dev, 3);

pci_set_power_state() can sleep, so we shouldn't be calling it
under spin_lock_irqsave().  Is it necessary to hold the lock
here?