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Message-ID: <563453A9.8060800@linux.intel.com>
Date:	Sat, 31 Oct 2015 13:37:45 +0800
From:	"Lu, Baolu" <baolu.lu@...ux.intel.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Mathias Nyman <mathias.nyman@...el.com>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 11/12] usb: serial: usb_debug: add support for dbc debug
 device



On 10/30/2015 10:41 PM, Greg Kroah-Hartman wrote:
> On Fri, Oct 30, 2015 at 07:46:45PM +0800, Lu, Baolu wrote:
>>
>> On 10/28/2015 08:33 PM, Greg Kroah-Hartman wrote:
>>> On Wed, Oct 28, 2015 at 04:00:42PM +0800, Lu Baolu wrote:
>>>> This patch add dbc debug device support in usb_debug driver.
>>>>
>>>> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
>>>> ---
>>>>   drivers/usb/serial/usb_debug.c | 29 ++++++++++++++++++++++++++---
>>>>   1 file changed, 26 insertions(+), 3 deletions(-)
>>>>
>>>> diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c
>>>> index ca2fa5b..d4903b0 100644
>>>> --- a/drivers/usb/serial/usb_debug.c
>>>> +++ b/drivers/usb/serial/usb_debug.c
>>>> @@ -32,7 +32,18 @@ static const struct usb_device_id id_table[] = {
>>>>   	{ USB_DEVICE(0x0525, 0x127a) },
>>>>   	{ },
>>>>   };
>>>> -MODULE_DEVICE_TABLE(usb, id_table);
>>>> +
>>>> +static const struct usb_device_id dbc_id_table[] = {
>>>> +	{ USB_DEVICE(0x1d6b, 0x0004) },
>>>> +	{ },
>>>> +};
>>>> +
>>>> +static const struct usb_device_id id_table_combined[] = {
>>>> +	{ USB_DEVICE(0x0525, 0x127a) },
>>>> +	{ USB_DEVICE(0x1d6b, 0x0004) },
>>>> +	{ },
>>>> +};
>>>> +MODULE_DEVICE_TABLE(usb, id_table_combined);
>>> You shouldn't need a "combined" module device table anymore, the module
>>> core was changed a while ago to remove that restriction, you should be
>>> able to just multiple exports of MODULE_DEVICE_TABLE and everything
>>> should "just work" on the export side.  Now it might not work on the usb
>>> core side, but that's a different issue...
>> Before I dive into the serial driver code, can anybody tell me, if
>> I remove the "combined" module device table, what should I
>> specify the second parameter for module_usb_serial_driver()?
>>
>> The previous declaration is,
>>
>> module_usb_serial_driver(serial_drivers, id_table_combined);
> Yeah, that's the issue I was alluding to here, maybe this will not work
> just yet for USB serial drivers, sorry to lead you down the wrong path.
> Your original patch should be fine for now.

Okay, I will keep that patch.

>
> thanks,
>
> greg k-h

Thanks,
Baolu

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