Re: ibusbk claim interface fail after 32 loops

On Mon, Jul 13, 2015 at 3:14 PM, michel <[email protected]> wrote:
> I'm doing a simple repetitive open/close test using libusb 1.0.19 and libusbk
> 3.0.7
>
> The target device is a composite device based on CDC/ACM  (2 interface MI0
> and MI1) type configuration but with vendor specific class code
>
> basically what i'm doing
>
> libusb_open(device, &handle);
> libusb_claim_interface(handle,1);
>
> libusb_release_interface(handle,1);
> libusb_close(handle);
>
> After 32 loops claim interface will fail with error -3
> this doesn't happen with 3.0.6  thousand loops can be execuetd without any
> problem
>
> i'm using win-7 64
>
> failure occur in both 32/64 bits (mingw32/64) .
>

I believe this is fixed in the git head version of libusb. Please clone
the git version and build libusb.
Ref: https://github.com/libusb/libusb
Ref: https://github.com/libusb/libusb/commit/63a440f154364f0d306387d82ae6ae5f2ca1ab61


-- 
Xiaofan

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