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uru4000: Fix missing reference to image transfer

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We might redo image transfers, but we only ever had one reference that
was implicitly removed after the transfer completed. Add a new reference
each time it is submitted and only free the last reference in the stop
handler.
This commit is contained in:
Benjamin Berg 2020-10-19 17:01:06 +02:00
parent 1754bd0204
commit 96fa0a96eb
1 changed files with 6 additions and 3 deletions
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9
libfprint/drivers/uru4000.c
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@ -663,7 +663,11 @@ imaging_run_state (FpiSsm *ssm, FpDevice *_dev)
case IMAGING_CAPTURE:
self->img_lines_done = 0;
self->img_block = 0;
fpi_usb_transfer_submit (self->img_transfer, 0, NULL, image_transfer_cb, NULL);
fpi_usb_transfer_submit (fpi_usb_transfer_ref (self->img_transfer),
0,
NULL,
image_transfer_cb,
NULL);
break;
@ -799,8 +803,7 @@ imaging_complete (FpiSsm *ssm, FpDevice *dev, GError *error)
if (error)
fpi_image_device_session_error (FP_IMAGE_DEVICE (dev), error);
/* Freed by callback or cancellation */
self->img_transfer = NULL;
g_clear_pointer (&self->img_transfer, fpi_usb_transfer_unref);
g_free (self->img_data);
self->img_data = NULL;