Hi,
> I can't tell what's going on in your log. Look at the
> FSG_STATE_CONFIG_CHANGE case in handle_exception(). Here's the code:
>
> rc = do_set_config(fsg, new_config);
> if (fsg->ep0_req_tag != exception_req_tag)
> break;
> if (rc != 0) // STALL on errors
> fsg_set_halt(fsg, fsg->ep0);
> else // Complete the status stage
> ep0_queue(fsg);
> break;
>
> It calls do_set_config(). After that, fsg->ep0_req_tag should be equal
> to exception_req_tag and rc should be equal to 0. Therefore the code
> will call ep0_queue(), which calls usb_ep_queue().
I found out from printk, the fsg->ep0_req_tag and exception_req_tag
are not equal, and rc is 0. In standard_setup_req(), case
USB_REQ_SET_CONFIGURATION, once i add the following code
if (w_value == 0)
fsg->config = 0;
just before the break; statement, the "Device Descriptor
Test-Addressed State" can pass. It seems that Get-Config request from
host cannot wait, so i have to return the latest config value in
response to the request.
Thanks,
victor
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