linux-kernel - Re: Subject: [PATCH 2.6.20 004/005] dmfe: Add support for suspend/resume

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Message-Id: <200702180029.03651.maximlevitsky@gmail.com>
Date:	Sun, 18 Feb 2007 00:29:03 +0200
From:	Maxim <maximlevitsky@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	netdev@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: Subject:  [PATCH 2.6.20 004/005] dmfe: Add support for suspend/resume

On Saturday 17 February 2007 13:50:29 Pavel Machek wrote:
> Hi!
> 
> > @@ -2050,11 +2047,56 @@ static struct pci_device_id dmfe_pci_tbl
> >  MODULE_DEVICE_TABLE(pci, dmfe_pci_tbl);
> >  
> >  
> > +
> > +static int dmfe_suspend(struct pci_dev *pci_dev, pm_message_t state)
> > +{
> > +	struct net_device *dev = pci_get_drvdata(pci_dev);
> > +	struct dmfe_board_info *db = netdev_priv(dev);
> > +
> > +	/* Disable upper layer interface */
> > +	netif_device_detach (dev);
> > +
> > +	/* Disable Tx/Rx */
> > +	db->cr6_data &= ~(CR6_RXSC | CR6_TXSC);
> > +	update_cr6(db->cr6_data, dev->base_addr);
> > +
> > +	/* Disable Interrupt */
> > +	outl (0, dev->base_addr + DCR7);
> > +	outl (inl (dev->base_addr + DCR5), dev->base_addr + DCR5);
> 
> Please no space between function and "(".

I missed that part of coding style about no space after function name
> 
> > +	/* Fre RX buffers */
> 
> Free?

Of course  :-)
> 
> > +	dmfe_free_rxbuffer (db);
> 
> > +	/* Power down device*/
> 
> " */"
> 
> > +	pci_set_power_state (pci_dev, pci_choose_state (pci_dev,state));
> 
> Let it be ", state", and delete spaces between function and "(".

Sure
> 
> 
> > +static int dmfe_resume (struct pci_dev *pci_dev)
> 
> delete spaces between function and "(".
> 
> > +	pci_restore_state(pci_dev);
> > +	pci_set_power_state(pci_dev ,PCI_D0);
> > +
> 
> ", "
> 
> Otherwise looks ok to me.
> 

Hello ,  I am sorry that I missed some parts of coding style. I need to reread it :-)

There is a updated patch :

--- linux-2.6.20-mod/drivers/net/tulip/dmfe.c	2007-02-15 18:24:47.000000000 +0200
+++ linux-2.6.20-test/drivers/net/tulip/dmfe.c	2007-02-15 18:26:34.000000000 +0200
@@ -55,9 +55,6 @@
 
     TODO
 
-    Implement pci_driver::suspend() and pci_driver::resume()
-    power management methods.
-
     Check on 64 bit boxes.
     Check and fix on big endian boxes.
 
@@ -2050,11 +2047,56 @@ static struct pci_device_id dmfe_pci_tbl
 MODULE_DEVICE_TABLE(pci, dmfe_pci_tbl);
 
 
+
+static int dmfe_suspend(struct pci_dev *pci_dev, pm_message_t state)
+{
+	struct net_device *dev = pci_get_drvdata(pci_dev);
+	struct dmfe_board_info *db = netdev_priv(dev);
+
+	/* Disable upper layer interface */
+	netif_device_detach(dev);
+
+	/* Disable Tx/Rx */
+	db->cr6_data &= ~(CR6_RXSC | CR6_TXSC);
+	update_cr6(db->cr6_data, dev->base_addr);
+
+	/* Disable Interrupt */
+	outl (0, dev->base_addr + DCR7);
+	outl (inl(dev->base_addr + DCR5), dev->base_addr + DCR5);
+
+	/* Free RX buffers */
+	dmfe_free_rxbuffer(db);
+
+	/* Power down device*/
+	pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state));
+	pci_save_state(pci_dev);
+
+	return 0;
+}
+
+static int dmfe_resume(struct pci_dev *pci_dev)
+{
+	struct net_device *dev = pci_get_drvdata(pci_dev);
+
+	pci_restore_state(pci_dev);
+	pci_set_power_state(pci_dev, PCI_D0);
+
+	/* Re-initialize DM910X board */
+	dmfe_init_dm910x(dev);
+
+	/* Restart upper layer interface */
+	netif_device_attach(dev);
+
+	return 0;
+}
+
 static struct pci_driver dmfe_driver = {
 	.name		= "dmfe",
 	.id_table	= dmfe_pci_tbl,
 	.probe		= dmfe_init_one,
 	.remove		= __devexit_p(dmfe_remove_one),
+	.suspend        = dmfe_suspend,
+	.resume         = dmfe_resume
 };
 
 MODULE_AUTHOR("Sten Wang, sten_wang@...icom.com.tw");
-
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