linux-kernel - Re: [PATCH v2 4/6] HID: uclogic: apply quirk NO_EMPTY

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Date:	Sun, 01 Mar 2015 20:07:46 +0200
From:	Nikolai Kondrashov <spbnick@...il.com>
To:	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Jiri Kosina <jkosina@...e.cz>
CC:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	DIGImend-devel <DIGImend-devel@...ts.sourceforge.net>
Subject: Re: [PATCH v2 4/6] HID: uclogic: apply quirk NO_EMPTY_INPUT

On 02/26/2015 08:57 PM, Benjamin Tissoires wrote:
> NO_EMPTY_INPUT is useful when MULTI_INPUT is set. It prevents to create
> empty input nodes that user space does not know what to do with.
>
> It does not seem to be required at the moment, this is just a preventive
> patch. This check is only made during the plug of the device, so it does
> not hurt to have it.
>
> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@...hat.com>
> ---
>
> New in v2
>
>   drivers/hid/hid-uclogic.c | 1 +
>   1 file changed, 1 insertion(+)
>
> diff --git a/drivers/hid/hid-uclogic.c b/drivers/hid/hid-uclogic.c
> index 90e2612..ada8a94 100644
> --- a/drivers/hid/hid-uclogic.c
> +++ b/drivers/hid/hid-uclogic.c
> @@ -868,6 +868,7 @@ static int uclogic_probe(struct hid_device *hdev,
>   	 * than the pen, so use QUIRK_MULTI_INPUT for all tablets.
>   	 */
>   	hdev->quirks |= HID_QUIRK_MULTI_INPUT;
> +	hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
>
>   	/* Allocate and assign driver data */
>   	drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);

This seems safe and fine as a preventive.

Reviewed-by: Nikolai Kondrashov <spbnick@...il.com>

Nick
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