Hi Sergei,
On Wed, Feb 18, 2015 at 2:05 PM, Sergei Shtylyov
<sergei.shtylyov@xxxxxxxxxxxxxxxxxx> wrote:
> Hello.
>
> On 2/18/2015 12:17 AM, Ruslan Bilovol wrote:
>
>> Introduce new 'udc_name' member to usb_gadget_driver structure.
>> The 'udc_name' is a name of UDC that usb_gadget_driver should
>> be bound to. If udc_name is NULL, it will be bound to any
>> available UDC.
>
>
>> Signed-off-by: Ruslan Bilovol <ruslan.bilovol@xxxxxxxxx>
>> ---
>> drivers/usb/gadget/udc/udc-core.c | 25 ++++++++++++++++++++-----
>> include/linux/usb/gadget.h | 4 ++++
>> 2 files changed, 24 insertions(+), 5 deletions(-)
>
>
>> diff --git a/drivers/usb/gadget/udc/udc-core.c
>> b/drivers/usb/gadget/udc/udc-core.c
>> index 5a81cb0..e1079e08 100644
>> --- a/drivers/usb/gadget/udc/udc-core.c
>> +++ b/drivers/usb/gadget/udc/udc-core.c
>> @@ -440,21 +440,36 @@ EXPORT_SYMBOL_GPL(usb_udc_attach_driver);
>> int usb_gadget_probe_driver(struct usb_gadget_driver *driver)
>> {
>> struct usb_udc *udc = NULL;
>> - int ret;
>> + int ret = -ENODEV;
>>
>> if (!driver || !driver->bind || !driver->setup)
>> return -EINVAL;
>>
>> mutex_lock(&udc_lock);
>> - list_for_each_entry(udc, &udc_list, list) {
>> - /* For now we take the first one */
>> - if (!udc->driver)
>> + if (driver->udc_name) {
>> + list_for_each_entry(udc, &udc_list, list) {
>> + ret = strcmp(driver->udc_name,
>> dev_name(&udc->dev));
>> + if (!ret)
>> + break;
>> + }
>> + if (ret)
>> + ret = -ENODEV;
>> + else if (udc->driver)
>> + ret = -EBUSY;
>> + else
>> goto found;
>> + } else {
>> + list_for_each_entry(udc, &udc_list, list) {
>> + /* For now we take the first one */
>> + if (!udc->driver)
>> + goto found;
>> + }
>> + ret = -ENODEV;
>
>
> Already assigned the same value by the initializer.
Thanks for pointing to this, will be fixed in next patch version
>
>> }
>>
>> pr_debug("couldn't find an available UDC\n");
>> mutex_unlock(&udc_lock);
>> - return -ENODEV;
>> + return ret;
>> found:
>> ret = udc_bind_to_driver(udc, driver);
>> mutex_unlock(&udc_lock);
>
> [...]
>
> WBR, Sergei
>
Best regards,
Ruslan
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