netdev - Re: [PATCH] e1000e: get rid of wasted space

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Date:	Wed, 22 Oct 2008 07:03:30 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: Re: [PATCH] e1000e: get rid of wasted space

Stephen Hemminger wrote:
> The name in the ring is only used once during setup so it shouldn't
> be in the data structure.
> 
> Signed-off-by: Stephen Hemminger <shemminger@...tta.com>
> 
> --- a/drivers/net/e1000e/e1000.h	2008-10-20 18:13:53.000000000 -0700
> +++ b/drivers/net/e1000e/e1000.h	2008-10-20 18:18:30.000000000 -0700
> @@ -153,7 +153,6 @@ struct e1000_ring {
>  	/* array of buffer information structs */
>  	struct e1000_buffer *buffer_info;
>  
> -	char name[IFNAMSIZ + 5];
>  	u32 ims_val;
>  	u32 itr_val;
>  	u16 itr_register;
> --- a/drivers/net/e1000e/netdev.c	2008-10-20 18:19:22.000000000 -0700
> +++ b/drivers/net/e1000e/netdev.c	2008-10-20 18:21:00.000000000 -0700
> @@ -1473,27 +1473,20 @@ static int e1000_request_msix(struct e10
>  {
>  	struct net_device *netdev = adapter->netdev;
>  	int err = 0, vector = 0;
> +	char irqname[IFNAMSIZ+5];
>  
> -	if (strlen(netdev->name) < (IFNAMSIZ - 5))
> -		sprintf(adapter->rx_ring->name, "%s-rx0", netdev->name);
> -	else
> -		memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
> +	snprintf(irqname, sizeof(irqname), "%s-rx0", netdev->name);
>  	err = request_irq(adapter->msix_entries[vector].vector,
> -			  &e1000_intr_msix_rx, 0, adapter->rx_ring->name,
> -			  netdev);
> +			  &e1000_intr_msix_rx, 0, irqname, netdev);
>  	if (err)
>  		goto out;
>  	adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
>  	adapter->rx_ring->itr_val = adapter->itr;
>  	vector++;
>  
> -	if (strlen(netdev->name) < (IFNAMSIZ - 5))
> -		sprintf(adapter->tx_ring->name, "%s-tx0", netdev->name);
> -	else
> -		memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
> +	snprintf(irqname, sizeof(irqname), "%s-tx0", netdev->name);
>  	err = request_irq(adapter->msix_entries[vector].vector,
> -			  &e1000_intr_msix_tx, 0, adapter->tx_ring->name,
> -			  netdev);
> +			  &e1000_intr_msix_tx, 0, irqname, netdev);
>  	if (err)
>  		goto out;
>  	adapter->tx_ring->itr_register = E1000_EITR_82574(vector);

ACK

for what it's worth...  I am following DaveM's lead, and waiting until 
net-next opens to start taking patches for 2.6.29.  He wants us to focus 
on bug fixing for now.

So, please resend once the merge window opens... thanks.

	Jeff




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