Re: [PATCH v2 08/15] usb: misc: idmouse: update to use usb_control_msg_send()

Anant Thazhemadam
2021-01-07T14:07:01Z

On 04/12/20 8:16 pm, Johan Hovold wrote:
> On Mon, Nov 30, 2020 at 07:00:31AM +0530, Anant Thazhemadam wrote:
>> The newer usb_control_msg_{send|recv}() API are an improvement on the
>> existing usb_control_msg() as it ensures that a short read/write is treated
>> as an error, data can be used off the stack, and raw usb pipes need not be
>> created in the calling functions.
>> For this reason, the instance of usb_control_msg() has been replaced with
>> usb_control_msg_send() appropriately.
>>
>> Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
>> ---
>> drivers/usb/misc/idmouse.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
> Especially for control transfers without a data stage there isn't
> really any benefit of the new helper.
>
> I'd just leave this one unchanged.
>
>> diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
>> index e9437a176518..52126441a633 100644
>> --- a/drivers/usb/misc/idmouse.c
>> +++ b/drivers/usb/misc/idmouse.c
>> @@ -56,8 +56,9 @@ static const struct usb_device_id idmouse_table[] = {
>> #define FTIP_SCROLL 0x24
>>
>> #define ftip_command(dev, command, value, index) \
>> - usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0), command, \
>> - USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
>> + usb_control_msg_send(dev->udev, 0, command, \
>> + USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, \
>> + value, index, NULL, 0, 1000, GFP_KERNEL)
>>
>> MODULE_DEVICE_TABLE(usb, idmouse_table);
> Johan

Understood. I'll make sure this is left out in the v3.

Thanks,
Anant