linux-kernel - Re: [PATCH] HID: quirks: Add no_init

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Message-ID: <alpine.LFD.2.20.1601280740580.3312@localhost>
Date:	Thu, 28 Jan 2016 07:44:35 +0900 (JST)
From:	Stafford Horne <shorne@...il.com>
To:	Jiri Kosina <jikos@...nel.org>
cc:	Stafford Horne <shorne@...il.com>, benjamin.tissoires@...hat.com,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH] HID: quirks: Add no_init_reports for AKAI midi
 controller



On Wed, 27 Jan 2016, Jiri Kosina wrote:

> On Wed, 27 Jan 2016, Stafford Horne wrote:
>
>> The midi controller times-out while initializing reports, this
>> causes boot to take an extra 10 seconds. The device descriptor
>> advertises that it has an internal HID device but seems to not
>> actually do anything useful.
>>
>> Signed-off-by: Stafford Horne <shorne@...il.com>
>> ---
>>  drivers/hid/hid-ids.h           | 3 +++
>>  drivers/hid/usbhid/hid-quirks.c | 1 +
>>  2 files changed, 4 insertions(+)
>>
>> diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
>> index b6ff6e7..3dfb166 100644
>> --- a/drivers/hid/hid-ids.h
>> +++ b/drivers/hid/hid-ids.h
>> @@ -61,6 +61,9 @@
>>  #define USB_VENDOR_ID_AIREN		0x1a2c
>>  #define USB_DEVICE_ID_AIREN_SLIMPLUS	0x0002
>>
>> +#define USB_VENDOR_ID_AKAI              0x2011
>> +#define USB_DEVICE_ID_AKAI_MPKMINI2     0x0715
>> +
>>  #define USB_VENDOR_ID_ALCOR		0x058f
>>  #define USB_DEVICE_ID_ALCOR_USBRS232	0x9720
>>
>> diff --git a/drivers/hid/usbhid/hid-quirks.c b/drivers/hid/usbhid/hid-quirks.c
>> index 7dd0953..055e740 100644
>> --- a/drivers/hid/usbhid/hid-quirks.c
>> +++ b/drivers/hid/usbhid/hid-quirks.c
>> @@ -55,6 +55,7 @@ static const struct hid_blacklist {
>>  	{ USB_VENDOR_ID_TOUCHPACK, USB_DEVICE_ID_TOUCHPACK_RTS, HID_QUIRK_MULTI_INPUT },
>>
>>  	{ USB_VENDOR_ID_AIREN, USB_DEVICE_ID_AIREN_SLIMPLUS, HID_QUIRK_NOGET },
>> +	{ USB_VENDOR_ID_AKAI, USB_DEVICE_ID_AKAI_MPKMINI2, HID_QUIRK_NO_INIT_REPORTS },
>
> If the (proclaimed) HID device is completely silent, wouldn't
> HID_QUIRK_IGNORE be more appropriate?

You are right, I did NO_INIT_REPORTS because thats where the timeout was. 
But after further investigation I found that device is silent.

I will change, test and resubmit a new patch version.

-Stafford