netdev - Re: [Bugme-new] [Bug 8107] New: dev->header_cache

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Date:	Fri, 02 Mar 2007 16:29:06 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	netdev@...r.kernel.org,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, loveminix@...oo.com.cn
Subject: Re: [Bugme-new] [Bug 8107] New: dev->header_cache_update has a random value

Andrew Morton <akpm@...ux-foundation.org> writes:

>> However, in 
>> drivers/net/wan/hdlc_cisco.c, in function static int cisco_ioctl(struct 
>> net_device *dev, struct ifreq *ifr), where dev->hard_header is assigned a valid 
>> function, and dev->hard_header_cache is assigned a known value (NULL), dev-
>> >header_cache_update is not set to a known value:

Right, it seems I was never aware of dev->header_cache_update existence.
I wonder where does the non-NULL value come from? Nevermind.

> diff -puN drivers/net/wan/hdlc_cisco.c~cisco_ioctl-initialise-header_cache_update drivers/net/wan/hdlc_cisco.c
> --- a/drivers/net/wan/hdlc_cisco.c~cisco_ioctl-initialise-header_cache_update
> +++ a/drivers/net/wan/hdlc_cisco.c
> @@ -366,6 +366,7 @@ static int cisco_ioctl(struct net_device
>  		dev->hard_start_xmit = hdlc->xmit;
>  		dev->hard_header = cisco_hard_header;
>  		dev->hard_header_cache = NULL;
> +		dev->header_cache_update = NULL;
>  		dev->type = ARPHRD_CISCO;
>  		dev->flags = IFF_POINTOPOINT | IFF_NOARP;
>  		dev->addr_len = 0;
> _

ACK, I think it's the best place.

Is it OK to leave this (and hard_header_cache) set to random value
if dev->hard_header = NULL (as with other protocols)?
-- 
Krzysztof Halasa
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