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Keep a global counter of how many async usb transfers are in place.

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This commit is contained in:
Con Kolivas 2013-10-24 20:36:53 +11:00
parent 856471e392
commit 824aa5cb51
1 changed files with 9 additions and 0 deletions
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9
usbutils.c
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@ -93,6 +93,10 @@
.epinfos = _epinfosy \
}
/* Keep a global counter of how many async transfers are in place to avoid
* shutting down the usb polling thread while they exist. */
int cgusb_transfers;
#ifdef USE_BFLSC
// N.B. transfer size is 512 with USB2.0, but only 64 with USB1.1
static struct usb_epinfo bas_epinfos[] = {
@ -2223,6 +2227,10 @@ static void complete_usb_transfer(struct usb_transfer *ut)
{
cgsem_destroy(&ut->cgsem);
libusb_free_transfer(ut->transfer);
cg_wlock(&cgusb_fd_lock);
cgusb_transfers--;
cg_wunlock(&cgusb_fd_lock);
}
static void LIBUSB_CALL transfer_callback(struct libusb_transfer *transfer)
@ -2289,6 +2297,7 @@ static int usb_submit_transfer(struct libusb_transfer *transfer)
cg_wlock(&cgusb_fd_lock);
err = libusb_submit_transfer(transfer);
cgusb_transfers++;
cg_wunlock(&cgusb_fd_lock);
return err;