https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=231322
Bug ID: 231322
Summary: libusb_bulk_transfer() does not fail (with
LIBUSB_ERROR_NO_DEVICE) if the device is not more
present
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: usb
Assignee: u...@freebsd.org
Reporter: ludovic.rousseau+free...@gmail.com
After a USB device has been removed I can (try to) send a USB packet using
libusb_bulk_transfer(). The program then blocks instead of returning an error.
I get the logs:
LIBUSB_FUNCTION: libusb_bulk_transfer enter
LIBUSB_FUNCTION: libusb_submit_transfer enter
dev: 0x28c09b80
pxfer0: 0x28c2f0f0
pxfer1: 0x28c2f12c
LIBUSB_FUNCTION: libusb_submit_transfer leave 0
LIBUSB_FUNCTION: libusb_handle_events_timeout_completed enter
LIBUSB_FUNCTION: libusb10_handle_events_sub enter
I added the dev and pxfer* logs.
Then the program is blocked until I kill it using Ctrl-C.
Under GNU/Linux libusb_bulk_transfer() returns the error
LIBUSB_ERROR_NO_DEVICE.
Maybe libusb_bulk_transfer() or libusb_submit_transfer() would check the USB
device is still present.
I can test patches. The problem is easy to reproduce for me.
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