linux-kernel - Re: [PATCH 2/3] hid: 3m: Convert to MT slots

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Message-ID: <4C97BB33.5020806@euromail.se>
Date:	Mon, 20 Sep 2010 21:51:15 +0200
From:	Henrik Rydberg <rydberg@...omail.se>
To:	Stéphane Chatty <chatty@...c.fr>
CC:	Jiri Kosina <jkosina@...e.cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] hid: 3m: Convert to MT slots

On 09/20/2010 09:46 PM, Stéphane Chatty wrote:

> 
> Le 28 août 10 à 16:29, Henrik Rydberg a écrit :
> 
>>  #define MAX_SLOTS        60
>> -#define MAX_TRKID        59
>> +#define MAX_TRKID        USHRT_MAX
>>
> 
> Oops, I forgot this one: in the rest of the code, it seems to me that you use
> your knowledge that TRACKINGID cannot be more than 59 (you use it to map the
> tracking ID onto the slot ID). Therefore, why change TRKID to a larger value?


There are only 60 slots available, but an infinite number of tracking ids.
Nowhere is the tracking id assumed to be bounded by anything but MAX_TRKID.

Henrik
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