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SubjectRE: [PATCH 1/2] HID: hid-sensor-hub: Clear HID_CLAIMED_INPUT bit earlier
Date
Hi Axel,

We don't need this anymore as when connect_mask is 0, the hid_connect will not be called.
So we don't need hdev->claimed = HID_CLAIMED_INPUT anymore.

Thanks for the review.

-Srinivas

-----Original Message-----
From: Axel Lin [mailto:axel.lin@gmail.com]
Sent: Thursday, September 13, 2012 6:25 AM
To: Jiri Kosina
Cc: Pandruvada, Srinivas; Jonathan Cameron; linux-input@vger.kernel.org; linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] HID: hid-sensor-hub: Clear HID_CLAIMED_INPUT bit earlier

2012/9/13 Axel Lin <axel.lin@gmail.com>:
> Clear HID_CLAIMED_INPUT bit of hdev->claimed, this prevents calling
> hidinput_disconnect() in hid_disconnect(), which is called by hid_hw_stop().
>
> We need to clear HID_CLAIMED_INPUT bit earlier rather than in
> sensor_hub_remove() because we also call hid_hw_stop() in
> sensor_hub_probe error handling.
>
> Also adds comments for why we set hdev->claimed = HID_CLAIMED_INPUT.
>
> Signed-off-by: Axel Lin <axel.lin@gmail.com>
> ---
> Hi srinivas,
> I don't have this hardware, I'd appreciate if you can test these patches.
> Axel
>
> drivers/hid/hid-sensor-hub.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hid/hid-sensor-hub.c
> b/drivers/hid/hid-sensor-hub.c index 4ac759c..50bc8c7 100644
> --- a/drivers/hid/hid-sensor-hub.c
> +++ b/drivers/hid/hid-sensor-hub.c
> @@ -539,8 +539,11 @@ static int sensor_hub_probe(struct hid_device *hdev,
> }
> INIT_LIST_HEAD(&hdev->inputs);
>
> + /* We don't use hidinput but hid_hw_start() fails if nothing is
> + * claimed. So spoof claimed input. */
> hdev->claimed = HID_CLAIMED_INPUT;
> ret = hid_hw_start(hdev, 0);

I check the implementation of hid_hw_start again, it looks hid_hw_start allows connect_mask to be 0.
So we don't need setting "hdev->claimed = HID_CLAIMED_INPUT;" here.
Comments?

Axel


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