Subject: Re: [patch 4/4] Update e1000 driver to use devres.

From: "Kok, Auke" <[email-masked]>
Date: Thu, 16 Aug 2007 10:36:46 -0700

Tejun Heo wrote:
> Brandon Philips wrote:
>> -	mmio_start = pci_resource_start(pdev, BAR_0);
>>  	mmio_len = pci_resource_len(pdev, BAR_0);
> 
> You don't need mmio_len either.
> 
>> -	err = -EIO;
>> -	adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
>> +	adapter->hw.hw_addr = pcim_iomap(pdev, BAR_0, mmio_len);
> 
> Passing 0 as @max_len tells pci[m]_iomap() to use pci_resource_len() of
> the BAR.
> 
>> @@ -952,16 +948,15 @@ e1000_probe(struct pci_dev *pdev,
>>  	/* setup the private structure */
>>  
>>  	if ((err = e1000_sw_init(adapter)))
>> -		goto err_sw_init;
>> +		return err;
>>  
>>  	err = -EIO;
>>  	/* Flash BAR mapping must happen after e1000_sw_init
>>  	 * because it depends on mac_type */
>>  	if ((adapter->hw.mac_type == e1000_ich8lan) &&
>>  	   (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
>> -		flash_start = pci_resource_start(pdev, 1);
>>  		flash_len = pci_resource_len(pdev, 1);
> 
> Ditto.
> 
>> -		adapter->hw.flash_address = ioremap(flash_start, flash_len);
>> +		adapter->hw.flash_address = pcim_iomap(pdev, 1, flash_len);
>>  		if (!adapter->hw.flash_address)
>>  			goto err_flashmap;
>>  	}
> 

brandon,

seeing the multiple revisions I am scared that this will produce some fallout 
and e1000 already is quite fragile. I would suggest that you instead work 
against "e1000e" which is in a branch on jgarzik's netdev tree instead. This 
driver is new and it would be much more interesting to have devres used in here 
instead.

Since this driver is in -mm as well this would give your patches some testing 
before it goes upstream.

Let's leave e1000 alone for now if we can.

Auke

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