netdev - Re: [PATCH net-next v3] em_canid: Ematch rule to match CAN frames according to their identifiers

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Date:	Mon, 02 Jul 2012 20:03:27 +0200
From:	Oliver Hartkopp <socketcan@...tkopp.net>
To:	Rostislav Lisovy <lisovy@...il.com>
CC:	netdev@...r.kernel.org, linux-can@...r.kernel.org,
	lartc@...r.kernel.org, pisa@....felk.cvut.cz, sojkam1@....cvut.cz
Subject: Re: [PATCH net-next v3] em_canid: Ematch rule to match CAN frames
 according to their identifiers

One more simplification:


>> +	rulescnt = len / sizeof(struct can_filter);
>> +
>> +	cm = kzalloc(sizeof(struct canid_match) + sizeof(struct can_filter) *
>> +		rulescnt, GFP_KERNEL);


No need to multiply the value again  ... you can take the len value as-is:

cm = kzalloc(sizeof(struct canid_match) + len, GFP_KERNEL);


> 
> *cm is no longer a fixed structure as it was in the first patches.
> 
> Must be:
> 
> m->datalen = sizeof(struct canid_match) + sizeof(struct can_filter) * rulescnt


dito:

m->datalen = sizeof(struct canid_match) + len;

Regards,
Oliver
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