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Code Activity

scd: Fix release of transfer object.

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* scd/ccid-driver.c (intr_cb): Handle LIBUSB_TRANSFER_CANCELLED.
(do_close_reader): When callback is active, call
libusb_cancel_transfer and wait callback is fired off.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2017-01-27 20:43:29 +09:00
parent 25cc8575da
commit f92fe33f11
1 changed files with 28 additions and 17 deletions
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45
scd/ccid-driver.c
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@ -262,9 +262,9 @@ struct ccid_driver_s
unsigned int auto_param:1;
unsigned int auto_pps:1;
unsigned int auto_ifsd:1;
unsigned int powered_off:1;
unsigned int has_pinpad:2;
unsigned int enodev_seen:1;
int powered_off;
time_t last_progress; /* Last time we sent progress line. */
@ -1764,12 +1764,17 @@ intr_cb (struct libusb_transfer *transfer)
DEBUGOUT_1 ("CCID: interrupt callback %d\n", transfer->status);
if (transfer->status == LIBUSB_TRANSFER_NO_DEVICE
|| transfer->status == LIBUSB_TRANSFER_ERROR)
if (transfer->status == LIBUSB_TRANSFER_TIMED_OUT)
{
device_removed:
DEBUGOUT ("CCID: device removed\n");
handle->powered_off = 1;
int err;
submit_again:
/* Submit the URB again to keep watching the INTERRUPT transfer. */
err = libusb_submit_transfer (transfer);
if (err == LIBUSB_ERROR_NO_DEVICE)
goto device_removed;
DEBUGOUT_1 ("CCID submit transfer again %d\n", err);
}
else if (transfer->status == LIBUSB_TRANSFER_COMPLETED)
{
@ -1782,19 +1787,17 @@ intr_cb (struct libusb_transfer *transfer)
}
else
{
int err;
/* Submit the URB again to keep watching the INTERRUPT transfer. */
err = libusb_submit_transfer (transfer);
if (err == LIBUSB_ERROR_NO_DEVICE)
goto device_removed;
DEBUGOUT_1 ("CCID submit transfer again %d\n", err);
/* Event other than card removal. */
goto submit_again;
}
}
else if (transfer->status == LIBUSB_TRANSFER_CANCELLED)
handle->powered_off = 1;
else
{
DEBUGOUT_1 ("CCID intr_cb: %d\n", transfer->status);
device_removed:
DEBUGOUT ("CCID: device removed\n");
handle->powered_off = 1;
}
}
@ -2048,11 +2051,19 @@ do_close_reader (ccid_driver_t handle)
if (!rc)
bulk_in (handle, msg, sizeof msg, &msglen, RDR_to_PC_SlotStatus,
seqno, 2000, 0);
handle->powered_off = 1;
}
if (handle->idev)
{
libusb_free_transfer (handle->transfer);
if (handle->transfer)
{
if (!handle->powered_off)
{
libusb_cancel_transfer (handle->transfer);
while (!handle->powered_off)
libusb_handle_events_completed (NULL, &handle->powered_off);
}
libusb_free_transfer (handle->transfer);
}
libusb_release_interface (handle->idev, handle->ifc_no);
libusb_close (handle->idev);
handle->idev = NULL;