I an previous blog article I talked about the situation of libusb:
The bug [PATCH] Fix a race condition in io.c libusb_handle_events_timeout() (also known as ticket #56) has a great impact on users of my CCID driver by blocking the USB transfer for 60 seconds in some cases.
It looks like that bug #56 happens more often on recent Linux kernels, like the Linux kernel provided with Ubuntu 11.04. So it is now more-or-less urgent to fix the problem in libusb.
The bug has been reported since 8 months. A fix is available since April 2010 but is not yet applied in upstream libusb git repository. So I fixed it in my libusb repository on github to not forget it and because I needed a fixed version for myself.
I already provide a git snapshot of the upstream (official) repository in the file libusb-1.0.8-git.tar.bz2 from http://ludovic.rousseau.free.fr/softwares/pcsc-lite/.
I now also provide a git snapshot of my own github version with ticket #56 fixed in the file libusb-1.0.8-github.tar.bz2.
So before reporting a bug in libccid first try a newer version of libusb. If the bug is at the communication level it may already be solved in the upstream libusb snapshot version or my patched version.
- a stable libusb has not been released since May 2010 (exactly one year ago)
- bugs are still open even if they have patches attached in the bug report
Impacts on libccid
The bug [PATCH] Fix a race condition in io.c libusb_handle_events_timeout() (also known as ticket #56) has a great impact on users of my CCID driver by blocking the USB transfer for 60 seconds in some cases.
It looks like that bug #56 happens more often on recent Linux kernels, like the Linux kernel provided with Ubuntu 11.04. So it is now more-or-less urgent to fix the problem in libusb.
The bug has been reported since 8 months. A fix is available since April 2010 but is not yet applied in upstream libusb git repository. So I fixed it in my libusb repository on github to not forget it and because I needed a fixed version for myself.
libusb git snapshot x2
I already provide a git snapshot of the upstream (official) repository in the file libusb-1.0.8-git.tar.bz2 from http://ludovic.rousseau.free.fr/softwares/pcsc-lite/.
I now also provide a git snapshot of my own github version with ticket #56 fixed in the file libusb-1.0.8-github.tar.bz2.
Conclusion
So before reporting a bug in libccid first try a newer version of libusb. If the bug is at the communication level it may already be solved in the upstream libusb snapshot version or my patched version.
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.
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