linux-kernel - Re: [PATCH] HID:magicmouse: This fixes a connection problem with the magicmouse.

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Date:	Wed, 12 May 2010 06:39:40 -0700
From:	"Justin P. Mattock" <justinmattock@...il.com>
To:	Jiri Kosina <jkosina@...e.cz>
CC:	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
	mdpoole@...ilus.org
Subject: Re: [PATCH] HID:magicmouse: This fixes a connection problem with
 the magicmouse.

On 05/12/2010 05:58 AM, Jiri Kosina wrote:
> On Tue, 11 May 2010, Justin P. Mattock wrote:
>
>    
>> With the latest HEAD, I've noticed that I needed to add: HIDRAW=y in
>> order for my apple magicmouse to connect. After receiving some posts, it
>> seems this it not the case(HIDRAW just relays HID events to userspace).
>>
>> The bisect results of this issue resulted in commit: HID:magicmouse: fix
>> oops after device removal.
>> (hash:28918c211d86b6eeb70182c523800c7bc442960c)
>>
>> After examining this commit, I've noticed that HID_CONNECT_DEFAULT has
>> also an entry in there of HID_CONNECT_HIDINPUT, not sure what "~" means,
>>      
> ~ is zeroing out the HID_CONENCT_HIDINPUT bits from the connect mask, as
> magicmouse driver is handling the input itself.
>
>    
ah.. cool thanks for that..(I still have lots to learn(so many 
expressions)).
>> before HID_CONNECT_HIDINPUT, but after removing
>> this(correct me if I'm wrong)"double" definition,
>> I'm able to have my magicmouse connect without the
>> need of HIDRAW, and also this in dmesg:
>>
>> magicmouse 0005:05AC:030D.0004: claimed by neither input, hiddev nor hidraw
>> magicmouse 0005:05AC:030D.0004: magicmouse hw start failed
>>
>> and as well as the crash that the above commit fixes when waking
>> up from suspend(mouse connects perfectly upon wakeup).
>>
>> Please have a look, and if this works, take it
>> if theres another solution let me know.
>> (so I can enjoy the power of the magicmouse!!).
>>
>>
>> Signed-off-by: Justin P. Mattock<justinmattock@...il.com>
>>
>> ---
>>   drivers/hid/hid-magicmouse.c |    2 +-
>>   1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
>> index 0d471fc..0de5e96 100644
>> --- a/drivers/hid/hid-magicmouse.c
>> +++ b/drivers/hid/hid-magicmouse.c
>> @@ -354,7 +354,7 @@ static int magicmouse_probe(struct hid_device *hdev,
>>   		goto err_free;
>>   	}
>>
>> -	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT&  ~HID_CONNECT_HIDINPUT);
>> +	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
>>      
> This is not particularly right, as we'll end up having dangling input
> device.
>
> The problem is, that when HIDRAW is not set, hid_hw_start() returns ENODEV
> as no subsystem has claimed the device, and probe routine bails out. Which
> is not what we want.
>
> Does the testing patch below fix the problems you are seeing?
>
>
>    
works good.. rebooted a few times
mouse connects. suspended a few times mouse reconnects.
> diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c
> index 0d471fc..f10d56a 100644
> --- a/drivers/hid/hid-magicmouse.c
> +++ b/drivers/hid/hid-magicmouse.c
> @@ -354,12 +354,15 @@ static int magicmouse_probe(struct hid_device *hdev,
>   		goto err_free;
>   	}
>
> -	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT&  ~HID_CONNECT_HIDINPUT);
> +	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
>   	if (ret) {
>   		dev_err(&hdev->dev, "magicmouse hw start failed\n");
>   		goto err_free;
>   	}
>
> +	/* we are handling the input ourselves */
> +	hidinput_disconnect(hdev);
> +
>   	report = hid_register_report(hdev, HID_INPUT_REPORT, TOUCH_REPORT_ID);
>   	if (!report) {
>   		dev_err(&hdev->dev, "unable to register touch report\n");
>
>    

looks good over here.. If you'd like I can re-du
this patch, add your sign off etc.. and re-send,
or not worry.. either way this little quirk/problem
is fixed.

Justin P. Mattock
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