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image-device: Avoid invalid state transition on cancellation

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Fixes: #226
This commit is contained in:
Benjamin Berg 2020-01-15 14:48:06 +01:00
parent 29a13a9b4a
commit 05bc2e1c80
2 changed files with 15 additions and 5 deletions
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2
libfprint/drivers/elan.c
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@ -585,8 +585,6 @@ capture_complete (FpiSsm *ssm, FpDevice *_dev, GError *error)
G_DEBUG_HERE ();
/* XXX: cancellation was specially handled by doing nothing! */
/* either max frames captured or timed out waiting for the next frame */
if (!error ||
(g_error_matches (error, G_USB_DEVICE_ERROR, G_USB_DEVICE_ERROR_TIMED_OUT) &&

18
libfprint/fpi-image-device.c
View file

@ -448,7 +448,9 @@ fpi_image_device_retry_scan (FpImageDevice *self, FpDeviceRetry retry)
* @error: The #GError to report
*
* Report an error while interacting with the device. This effectively
* aborts the current ongoing action.
* aborts the current ongoing action. Note that doing so will result in
* the deactivation handler to be called and this function must not be
* used to report an error during deactivation.
*/
void
fpi_image_device_session_error (FpImageDevice *self, GError *error)
@ -475,10 +477,20 @@ fpi_image_device_session_error (FpImageDevice *self, GError *error)
return;
}
}
else if (g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED) &&
fpi_device_action_is_cancelled (FP_DEVICE (self)))
{
/* Ignore cancellation errors here, as we will explicitly deactivate
* anyway (or, may already have done so at this point).
*/
g_debug ("Driver reported a cancellation error, this is expected but not required. Ignoring.");
g_clear_error (&error);
return;
}
else if (priv->state == FPI_IMAGE_DEVICE_STATE_INACTIVE)
{
g_warning ("Driver reported session error; translating to deactivation failure.");
fpi_image_device_deactivate_complete (self, error);
g_warning ("Driver reported session error while deactivating already, ignoring. This indicates a driver bug.");
g_clear_error (&error);
return;
}