netdev - RE: [net-next v4 1/7] i40e: main driver core

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Date:	Thu, 5 Sep 2013 17:59:47 +0000
From:	"Nelson, Shannon" <shannon.nelson@...el.com>
To:	Stephen Hemminger <stephen@...workplumber.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:	"davem@...emloft.net" <davem@...emloft.net>,
	"Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"gospo@...hat.com" <gospo@...hat.com>,
	"sassmann@...hat.com" <sassmann@...hat.com>,
	"Waskiewicz Jr, Peter P" <peter.p.waskiewicz.jr@...el.com>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>
Subject: RE: [net-next v4 1/7] i40e: main driver core

> -----Original Message-----
> From: Stephen Hemminger [mailto:stephen@...workplumber.org]
> Sent: Thursday, September 05, 2013 9:27 AM
> 
> More review comments, these are non-blocking, and can be fixed later.

Thanks, Stephen, we'll roll these updates in soon.
sln

> 
> Minor
> -----
> * style
>     not a fan of doing own error codes and handling (ie. I40E_SUCCESS)
>     which probably is side effect of OS abstraction.
> 
> * extra parens aren't needed on return
>      return (budget > 0);
> 
> * i40e_config_netdev
>     etherdev_size = (sizeof(struct i40e_netdev_priv));
> 	 Extra paren, only used once, unsigned vs signed, just
> 	 use sizeof()
>     strlcpy(netdev->name, "eth%d", IFNAMSIZ-1);
>         That is already done by alloc_etherdev
>     memcpy(netdev->dev_addr, mac_addr, netdev->addr_len);
>        netdev->addr_len is ETH_ALEN, mac_addr is ETH_ALEN
>        just use constant size copy.
> * i40e_init_module
>     ret = pci_register_driver(&i40e_driver);
>     return ret;
>        assignment is unneeded, just do return pci_register_driver
> 
> * service timer
>      since it is 1 HZ, you should use round_jiffies to align
>      on clock boundary to save power.
> 
> * Why is Kbuild file used instead of Makefile like other drivers?
> 
> * Ethtool
>   Need to use ethtool_cmd_speed_set othewise only lower bit set.
> 
> * Extension I40E_DEBUG_USER is non-standard
> 
> * What is is point of using snprintf() in i40e_get_drvinfo
> 	snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
> 		 "%s", i40e_fw_version_str(&pf->hw));
>   Already using strlcpy() for other fields.
> 
> * Ethtool ops can be const
> 
> * isn't vsi->netdev = NULL needed here.
> s32 i40e_vsi_release(struct i40e_vsi *vsi)
> 	if (vsi->netdev_registered) {
> 			vsi->netdev_registered = false;
> 			if (vsi->netdev) {
> 				/* results in a call to i40e_close() */
> 				unregister_netdev(vsi->netdev);
> 				free_netdev(vsi->netdev);
> 			>>>>	vsi->netdev = NULL;
> 
> 
> Enhancement
> -----------
> * Support Byte Queue Limits
>   - might be tougher with VBE
> 

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