[U-Boot] [PATCH 1/1] usb: gadget: g_dnl: Use serial# variable to set g_dnl_serial

[Łukasz Majewski]

On 08/31/2017 08:45 PM, Sam Protsenko wrote:
> On 31 August 2017 at 21:20, Sam Protsenko <semen.protsenko at linaro.org> wrote:
>> Since 842778a09104 commit, "fastboot devices" stopped to show correct
>> device serial number for TI boards, showing this line instead:
>>
>>     ????????????        fastboot
>>
>> This is because serial# env variable could be set after g_dnl gadget was
>> initialized (e.g. by using env_set() in the board file).
>>
>> To fix this, before checking g_dnl_serial, let's re-check if we have
>> valid serial# value. And if so, let's set it as g_dnl_serial value.
>>
>> Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
>> ---
>>  drivers/usb/gadget/g_dnl.c | 9 +++++++++
>>  1 file changed, 9 insertions(+)
>>
>> diff --git a/drivers/usb/gadget/g_dnl.c b/drivers/usb/gadget/g_dnl.c
>> index 0491a0eea9..e4d0289757 100644
>> --- a/drivers/usb/gadget/g_dnl.c
>> +++ b/drivers/usb/gadget/g_dnl.c
>> @@ -226,6 +226,15 @@ static int g_dnl_bind(struct usb_composite_dev *cdev)
>>
>>         g_dnl_bind_fixup(&device_desc, cdev->driver->name);
>>
>> +       /* First try to obtain serial number from serial# variable */
>> +       if (strlen(g_dnl_serial) == 0) {
>> +               const char *s;
>> +
>> +               s = env_get("serial#");
>> +               if (s)
>> +                       g_dnl_set_serialnumber((char *)s);
>> +       }
>> +
>>         if (strlen(g_dnl_serial)) {
>>                 id = usb_string_id(cdev);
>>                 if (id < 0)
>> --
>> 2.14.1
>>
>
> Similar commit: [1]. But I'm not sure that implementing
> g_dnl_bind_fixup() in board file is the best way to fix it.
>
> [1] http://git.denx.de/?p=u-boot.git;a=commit;h=e91ead868b536d0a0dc49aa48f4d8c80c1a94b79
>

I would opt for having g_dnl_bind_fixup() since it is generally used for 
tweaking board specific data to gadget subsystem (like vid, pid, serial 
number).


-- 
Best regards,

Lukasz Majewski

--

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