[U-Boot] [PATCH] cmd: usb: run 'usb start' when USB is stopped

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 28-11-16 07:54, Minkyu Kang wrote:
> Hi Jaehoon,
>
> On 28/11/16 14:08, Jaehoon Chung wrote:
>> Hi Marek,
>>
>> On 09/23/2016 01:15 PM, Simon Glass wrote:
>>> +Marek
>>>
>>> On 9 September 2016 at 04:20, Jaehoon Chung <jh80.chung@samsung.com> wrote:
>>>> If USB is stopped, just run 'usb start' instead of printing message.
>>>> Then user didn't consider whether usb is started or stopped.
>>
>> Do you have any other opinion for this? :)
>>
>> Best Regards,
>> Jaehoon Chung
>>
>>>>
>>>> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
>>>> ---
>>>>  cmd/usb.c | 4 ++--
>>>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git a/cmd/usb.c b/cmd/usb.c
>>>> index 455127c..4970851 100644
>>>> --- a/cmd/usb.c
>>>> +++ b/cmd/usb.c
>>>> @@ -651,8 +651,8 @@ static int do_usb(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
>>>>                 return 0;
>>>>         }
>>>>         if (!usb_started) {
>>>> -               printf("USB is stopped. Please issue 'usb start' first.\n");
>>>> -               return 1;
>>>> +               printf("USB is stopped. Running 'usb start' first.\n");
>>>> +               do_usb_start();
>>>>         }
>
> It seems to ambiguous whether initialization was succeed or not.

Right at a minimum it should detect that do_usb_start succeeds. E.g.
on an otg port without an otg -> usb-host cable plugged in it will not
succeed.

Regards,

Hans