linux-kernel - Re: [PATCH resend] hid-magicmouse: Increase evdev buffer size

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Message-ID: <4D975072.1040507@canonical.com>
Date:	Sat, 02 Apr 2011 12:36:02 -0400
From:	Chase Douglas <chase.douglas@...onical.com>
To:	Jeffrey Brown <jeffbrown@...roid.com>
CC:	Jiri Kosina <jkosina@...e.cz>,
	Henrik Rydberg <rydberg@...omail.se>,
	Simon Budig <simon@...ig.de>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH resend] hid-magicmouse: Increase evdev buffer size

On 04/01/2011 07:51 PM, Jeffrey Brown wrote:
> I've got another change in the works that fixes this problem more
> systematically.

That would be great :). I still would like to see this patch added so
it's released with the 2.6.39 kernel and backported to earlier stable
releases. I hope that's not a problem.

Thanks,

-- Chase

> On Fri, Apr 1, 2011 at 2:03 PM, Chase Douglas
> <chase.douglas@...onical.com> wrote:
>> The evdev buffer isn't big enough when you get many fingers on the
>> device. Bump up the buffer to a reasonable size, matching what other
>> multitouch devices use. Without this change, events may be discarded in
>> the evdev buffer before they are read.
>>
>> Reported-by: Simon Budig <simon@...ig.de>
>> Cc: Henrik Rydberg <rydberg@...omail.se>
>> Cc: Jiri Kosina <jkosina@...e.cz>
>> Cc: stable@...nel.org
>> Signed-off-by: Chase Douglas <chase.douglas@...onical.com>
>> ---
>> Forgot to Cc the mailing lists on the first send.
>>
>>  drivers/hid/hid-magicmouse.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
>> index 698e645..404dcbc 100644
>> --- a/drivers/hid/hid-magicmouse.c
>> +++ b/drivers/hid/hid-magicmouse.c
>> @@ -418,6 +418,8 @@ static void magicmouse_setup_input(struct input_dev *input, struct hid_device *h
>>                        input_set_abs_params(input, ABS_MT_POSITION_Y, -2456,
>>                                2565, 4, 0);
>>                }
>> +
>> +               input_set_events_per_packet(input, 60);
>>        }
>>
>>        if (report_undeciphered) {
>> --
>> 1.7.4.1
>>
>> --
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>>
> 

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