linux-kernel - Re: [PATCH 1/1] media: dvb-usb/af9015, fix disconnection crashes

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Date:	Thu, 04 Feb 2010 19:33:22 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
CC:	Jiri Kosina <jkosina@...e.cz>, Antti Palosaari <crope@....fi>,
	mchehab@...radead.org, linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@...hat.com>,
	linux-media@...r.kernel.org, Pekka Sarnila <sarnila@...t.fi>,
	linux-input@...r.kernel.org
Subject: Re: [PATCH 1/1] media: dvb-usb/af9015, fix disconnection crashes

On 02/04/2010 07:14 PM, Dmitry Torokhov wrote:
> On Thu, Feb 04, 2010 at 11:31:45AM +0100, Jiri Slaby wrote:
>  +
>> +static int dvb_event(struct hid_device *hdev, struct hid_field *field,
>> +		struct hid_usage *usage, __s32 value)
>> +{
>> +	/* we won't get a "key up" event */
>> +	if (value) {
>> +		input_event(field->hidinput->input, usage->type, usage->code, 1);
>> +		input_event(field->hidinput->input, usage->type, usage->code, 0);
> 
> Do not ever forget input_sync(), you need 2 of them here.
> 
> With the latest changes to evdev, if you are using SIGIO you won't get
> wioken up until EV_SYN/SYN_REPORT.

HID layer syncs on its own. So the second is not needed. Why is needed
the first?

I.e. should there be one also in dvb_usb_read_remote_control?
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