netdev - Re: [PATCH] PA Semi PWRficient Ethernet driver

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Message-ID: <20070130014107.GA18935@lixom.net>
Date:	Mon, 29 Jan 2007 19:41:08 -0600
From:	olof@...om.net (Olof Johansson)
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
Cc:	jgarzik@...ox.com, netdev@...r.kernel.org
Subject: Re: [PATCH] PA Semi PWRficient Ethernet driver

On Mon, Jan 29, 2007 at 10:22:33AM -0800, Stephen Hemminger wrote:
> Basic initalization, setup comments.

Thanks, fixes have been incorporated and will be reposted. Most of them
was obviously just my lack of diligence. See however the two below.

> > +static irqreturn_t pasemi_mac_tx_intr(int irq, void *data)
> > +{
> > +	struct net_device *dev = data;
> > +	struct pasemi_mac *mac = netdev_priv(dev);
> > +	unsigned int reg;
> > +
> > +	pasemi_mac_clean_tx(mac);
> > +
> > +	reg = PAS_IOB_DMA_TXCH_RESET_PINTC | PAS_IOB_DMA_TXCH_RESET_SINTC;
> > +	if (*mac->tx_status & PAS_STATUS_TIMER)
> > +		reg |= PAS_IOB_DMA_TXCH_RESET_TINTC;
> > +
> > +	pci_write_config_dword(mac->iob_pdev, PAS_IOB_DMA_TXCH_RESET(mac->dma_txch),
> > +			       reg);
> > +
> > +	return IRQ_HANDLED;
> > +}
> 
> To do shared IRQ's properly you need to check to see if
> this is your device IRQ or not. Maybe reading config value?

Right now it's guaranteed that the interrupts will not be shared. They're
fixed for the on-chip devices, and no other driver should be binding to
the same channels (and thus irqs).

If it changes in the future, the driver would need other rework as well.

> > +
> > +static struct pci_driver pasemi_mac_driver = {
> > +   .name = "pasemi_mac",
> > +   .id_table = pasemi_mac_pci_tbl,
> > +   .probe = pasemi_mac_probe,
> 
> Don't you need a remove routine?

No hotplug support at this time, so I didn't see any use in providing one.


-Olof
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