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

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Date:	Wed, 12 May 2010 06:57:03 -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 06:41 AM, Jiri Kosina wrote:
> On Wed, 12 May 2010, Justin P. Mattock wrote:
>
>    
>>>> --- 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.
>>      
> I'd be glad if you could also double-check that device removal and
> re-connecting it works well as well with this patch.
>
>    
with  test I did different techniques,
1) regular suspend(leave device on)
2)suspend then shut off device
3)shut off device then suspend
all of these techniques work properly
(let me know if this is what you meant).
>>> 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.
>>      
> No problem, once you confirm that device removal wasn't broken again and
> if I don't hear any objections from Michael, I will queue the patch
> myself.
>
> Thanks,
>
>    
alright buddy,
looks good over here.

cheers.

Justin P. Mattock
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