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Staging: comedi: unlock on error in usbdux_ao_inttrig() 

If we had an invalid trignum (anything other than zero is invalid) then
we returned without unlocking.  I've modified this function to just have
one return point.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Dan Carpenter 2011-11-30 11:42:21 +03:00 committed by Greg Kroah-Hartman
parent 2d2c880f8c
commit d6610a5027
1 changed files with 9 additions and 6 deletions
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15
drivers/staging/comedi/drivers/usbduxsigma.c
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@ -1523,15 +1523,17 @@ static int usbdux_ao_inttrig(struct comedi_device *dev,
return -EFAULT;
down(&this_usbduxsub->sem);
if (!(this_usbduxsub->probed)) {
up(&this_usbduxsub->sem);
return -ENODEV;
ret = -ENODEV;
goto out;
}
if (trignum != 0) {
dev_err(&this_usbduxsub->interface->dev,
"comedi%d: usbdux_ao_inttrig: invalid trignum\n",
dev->minor);
return -EINVAL;
ret = -EINVAL;
goto out;
}
if (!(this_usbduxsub->ao_cmd_running)) {
this_usbduxsub->ao_cmd_running = 1;
@ -1541,8 +1543,7 @@ static int usbdux_ao_inttrig(struct comedi_device *dev,
"comedi%d: usbdux_ao_inttrig: submitURB: "
"err=%d\n", dev->minor, ret);
this_usbduxsub->ao_cmd_running = 0;
up(&this_usbduxsub->sem);
return ret;
goto out;
}
s->async->inttrig = NULL;
} else {
@ -1550,8 +1551,10 @@ static int usbdux_ao_inttrig(struct comedi_device *dev,
"comedi%d: ao_inttrig but acqu is already running.\n",
dev->minor);
}
ret = 1;
out:
up(&this_usbduxsub->sem);
return 1;
return ret;
}
static int usbdux_ao_cmdtest(struct comedi_device *dev,