We have plenty of code paths where a transfer may be cancelled before it
is submitted. Unfortunately, libgusb up to and including version 0.3.6
are not handling that case correctly (due to libusb ignoring
cancellation on transfers that are not yet submitted).
Work around this, but do so in a somewhat lazy fashion that is not
entirely race free.
Closes: #306
Delay the open/close callbacks by 100ms so that we have a window of
opportunity for race conditions. This is needed to test certain
conditiosn in fprintd.
Adding a trailing \n to g_message, g_debug, g_warning and g_error is not
neccessary, as a newline will be added automatically by the logging
infrastructure.
The cancellable needs to be free'ed at deactivation. Also free it if we
run into a fatal error, which then in turn indicates that the device is
deactivated already.
The change_state function is called synchronously from the
image_captured callback. This means that deactivation of the device
happens during the img_cb function, causing the USB transfer to be
re-registered even though the device is already deactivating.
There are various ways to fix this, but it makes sense to directly bind
the cancellation to the deactivation. So create a cancellable that we
cancel at deactivation time, and make sure we always deactivate by going
through cancellation.
closes: #306
Image devices are simply deactivated suddenly. As such, the cancellation
logic of FpDevice is not really useful there, but the documentation was
apparently accidentally copied unmodified.
This is unlikely to happen in a real world scenario and currently breaks
running the CI test (not the umockdev based ones) while building the
flatpak. Lower the severity to avoid aborting because there is a
warning.
Image devices may return a FP_DEVICE_ERROR_NOT_SUPPORTED error once capture
is already started, in such case handle the error going in non imaging mode
This is based on the patch and observation from Bastien that some
URU4000B devices do not use encryption by default (it is a configuration
stored within the firmware). As such, it makes sense to always detect
whether encryption is in use by inspecting the image.
The encryption option would disable flipping of the image for the
URU400B device. Retain this behaviour for backward compatibility.
The code would just read 4096 bytes from the packet, without checking
the size and neither setting short_is_error. It is not clear whether
packets from the device are always 4096 bytes or not. But the code
assume we always get a full line, so enforce that and use the actual
packet size otherwise.
This was not used. The old driver used this if creating a USB transfer
failed, however, we delay any such failures (which cannot really happen)
into the callback today, where the error is handled differently.
The GPtrArray needs to be created at some point. Also, reference
counting was wrong as submitting the transfer sinks the ref, but we rely
on it surviving.
Note that we really should change this to only have one in-flight
transfer and starting a new one after it finishes.
Co-authored-by: Vasily Khoruzhick <anarsoul@gmail.com>
When sending static data, it would not be copied. The function that
sends it assumed that it should be free'ed though.
Fix this by simply always making a copy.
The driver would warn about the fact that a state change is queued, but
still queue it a second time. This would result in deactivation to run
twice.
See: #216
The image driver may still be deactivating when a new activation request
comes in. This is because of a hack to do early reporting, which is
technically not needed anymore.
Fix the immediate issue by properly reporting the retry case. The proper
fix is to only finish the previous operation after the device has been
deactivated.
One can set it in the project, but that doesn't get copied to forks. And
that means the coverage information isn't printed in MRs sometimes.
Just add it into .gitlab-ci.yml so that it always works.
