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[media] imon: use complete() instead of complete_all()

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There is only one waiter for the completion, therefore there is no need
to use complete_all(). Let's make that clear by using complete() instead
of complete_all().

While we are at it, we do a small optimization with the reinitialization
of the completion before we use it.

The usage pattern of the completion is:

waiter context                          waker context

send_packet()
  init_completion()
  usb_submit_urb()
  wait_for_completion_interruptible()

                                        usb_tx_callback()
                                          complete()

                                        imon_disonnect()
                                          complete()

Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Daniel Wagner 2016-09-16 08:18:21 -03:00 committed by Mauro Carvalho Chehab
parent 1ff52fa0f1
commit 7c073fffb7
1 changed files with 4 additions and 2 deletions
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6
drivers/media/rc/imon.c
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@ -607,7 +607,7 @@ static int send_packet(struct imon_context *ictx)
ictx->tx_urb->actual_length = 0;
}
init_completion(&ictx->tx.finished);
reinit_completion(&ictx->tx.finished);
ictx->tx.busy = true;
smp_rmb(); /* ensure later readers know we're busy */
@ -2216,6 +2216,8 @@ static struct imon_context *imon_init_intf0(struct usb_interface *intf,
ictx->tx_urb = tx_urb;
ictx->rf_device = false;
init_completion(&ictx->tx.finished);
ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
@ -2491,7 +2493,7 @@ static void imon_disconnect(struct usb_interface *interface)
/* Abort ongoing write */
if (ictx->tx.busy) {
usb_kill_urb(ictx->tx_urb);
complete_all(&ictx->tx.finished);
complete(&ictx->tx.finished);
}
if (ifnum == 0) {