Date: Fri, 28 Sep 2018 13:42:31 +0000 From: bugzilla-noreply@freebsd.org To: usb@FreeBSD.org Subject: [Bug 231782] a USB frame from an interrupt endpoint may be missed Message-ID: <bug-231782-19105@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D231782 Bug ID: 231782 Summary: a USB frame from an interrupt endpoint may be missed Product: Base System Version: 10.4-STABLE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: usb Assignee: usb@FreeBSD.org Reporter: ludovic.rousseau+freebsd@gmail.com Hello, I have another issue. I can reproduce it easily using 1 USB device and 2 threads using the same libUSB context. I know a sequence to always reproduce the problem but I have no idea where = the problem comes from. Maybe it is not in libUSB but in a lower layer. The USB interrupt end point is used to wait for an event from the USB devic= e. In my case then event is a card removal from the smart card reader. In that case 2 bytes are sent on the interrupt end point. I note that in a given condition the event is *never* received by my application. I also see *no* log activity from libUSB. So maybe libUSB does not receive = the USB frame. When this happens I have 1 thread waiting in libusb_handle_events_completed= () (waiting on the interrupt end point) and the other thread is not doing any libUSB activity. The card removal event is not received. But the card insertion event (also 2 bytes sent on the interrupt end point) has no problem and is received by li= bUSB and my program. It looks like in some cases a USB frame is lost. I can send you libUSB logs if you want. But I was not able to find any prob= lem in them. I was also not able to find why in some cases I have the problem a= nd why in other cases my program works fine. Is there an equivalent of the Linux usbmon kernel facility to see all the U= SB activity in FreeBSD? https://www.kernel.org/doc/Documentation/usb/usbmon.txt Thanks --=20 You are receiving this mail because: You are the assignee for the bug.=
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