linux-kernel - Re: [PATCH] Add eeprom_bad_csum

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Message-ID: <471E1ECD.80002@intel.com>
Date:	Tue, 23 Oct 2007 09:18:21 -0700
From:	"Kok, Auke" <auke-jan.h.kok@...el.com>
To:	Adam Jackson <ajax@...hat.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Add eeprom_bad_csum_allow module option to e1000.

Adam Jackson wrote:
> When the EEPROM gets corrupted, you can fix it with ethtool, but only if
> the module loads and creates a network device.  But, without this option,
> if the EEPROM is corrupted, the driver will not create a network device.
> 
> Signed-off-by: Adam Jackson <ajax@...hat.com>


NAK

wrong list, not sent to me, and while for e100 I was OK with this patch, for e1000
it really does not make sense to 'just allow' a bad checksum - if your eeprom is
randomly messed up then you cannot just fix it like this anyway.

Auke



> ---
>  drivers/net/e1000/e1000_main.c |   10 ++++++++--
>  1 files changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
> index f1ce348..b308c32 100644
> --- a/drivers/net/e1000/e1000_main.c
> +++ b/drivers/net/e1000/e1000_main.c
> @@ -255,6 +255,10 @@ static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE;
>  module_param(debug, int, 0);
>  MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
>  
> +static int eeprom_bad_csum_allow = 0;
> +module_param(eeprom_bad_csum_allow, int, 0);
> +MODULE_PARM_DESC(eeprom_bad_csum_allow, "Allow bad eeprom checksums");
> +
>  /**
>   * e1000_init_module - Driver Registration Routine
>   *
> @@ -1012,7 +1016,8 @@ e1000_probe(struct pci_dev *pdev,
>  
>  	if (e1000_validate_eeprom_checksum(&adapter->hw) < 0) {
>  		DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n");
> -		goto err_eeprom;
> +		if (!eeprom_bad_csum_allow)
> +			goto err_eeprom;
>  	}
>  
>  	/* copy the MAC address out of the EEPROM */
> @@ -1024,7 +1029,8 @@ e1000_probe(struct pci_dev *pdev,
>  
>  	if (!is_valid_ether_addr(netdev->perm_addr)) {
>  		DPRINTK(PROBE, ERR, "Invalid MAC Address\n");
> -		goto err_eeprom;
> +		if (!eeprom_bad_csum_allow)
> +			goto err_eeprom;
>  	}
>  
>  	e1000_get_bus_info(&adapter->hw);
-
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