staging: comedi: usbduxfast: remove 'probed' from private data

The 'probed' flag in the private data was used to handle the
disconnect between the usb (*probe) and the comedi_driver
(*auto_attach) so that if the comedi_driver was attached without
an associated usb_device the subdevice functions would return
-ENODEV.

Now that the usb_driver (*probe) is part of the comedi_driver
(*auto_attach), the comedi_driver can only attach if the usb
device is present.

Remove the unnecessary variable from the private data and its
uses in the driver.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/usbduxfast.c b/drivers/staging/comedi/drivers/usbduxfast.c
index a0a268b3715eb76d0876d2d066cd014dddb6ea4c..3043024249813e85715df2211f75c2edcc63f480 100644 (file)
--- a/drivers/staging/comedi/drivers/usbduxfast.c
+++ b/drivers/staging/comedi/drivers/usbduxfast.c
@@ -149,7 +149,6 @@ static const struct comedi_lrange range_usbduxfast_ai_range = {
  */
 struct usbduxfast_private {
        int attached;           /* is attached? */
-       int probed;             /* is it associated with a subdevice? */
        struct usb_device *usb; /* pointer to the usb-device */
        struct urb *urbIn;      /* BULK-transfer handling: urb */
        int8_t *transfer_buffer;
@@ -248,10 +247,6 @@ static int usbduxfast_ai_cancel(struct comedi_device *dev,
                return -EFAULT;
        }
        down(&devpriv->sem);
-       if (!devpriv->probed) {
-               up(&devpriv->sem);
-               return -ENODEV;
-       }
        /* unlink */
        ret = usbduxfast_ai_stop(devpriv, 1);
        up(&devpriv->sem);
@@ -476,14 +471,10 @@ static int usbduxfast_ai_cmdtest(struct comedi_device *dev,
                                 struct comedi_subdevice *s,
                                 struct comedi_cmd *cmd)
 {
-       struct usbduxfast_private *devpriv = dev->private;
        int err = 0;
        long int steps, tmp;
        int minSamplPer;
 
-       if (!devpriv->probed)
-               return -ENODEV;
-
        /* Step 1 : check if triggers are trivially valid */
 
        err |= cfc_check_trigger_src(&cmd->start_src,
@@ -580,10 +571,6 @@ static int usbduxfast_ai_inttrig(struct comedi_device *dev,
                return -EFAULT;
 
        down(&devpriv->sem);
-       if (!devpriv->probed) {
-               up(&devpriv->sem);
-               return -ENODEV;
-       }
 
        if (trignum != 0) {
                dev_err(dev->class_dev, "%s: invalid trignum\n", __func__);
@@ -632,10 +619,6 @@ static int usbduxfast_ai_cmd(struct comedi_device *dev,
                return -EFAULT;
 
        down(&devpriv->sem);
-       if (!devpriv->probed) {
-               up(&devpriv->sem);
-               return -ENODEV;
-       }
        if (devpriv->ai_cmd_running) {
                dev_err(dev->class_dev,
                        "ai_cmd not possible. Another ai_cmd is running.\n");
@@ -1083,10 +1066,6 @@ static int usbduxfast_ai_insn_read(struct comedi_device *dev,
        }
 
        down(&devpriv->sem);
-       if (!devpriv->probed) {
-               up(&devpriv->sem);
-               return -ENODEV;
-       }
        if (devpriv->ai_cmd_running) {
                dev_err(dev->class_dev,
                        "ai_insn_read not possible. Async Command is running.\n");
@@ -1342,8 +1321,6 @@ static int usbduxfast_auto_attach(struct comedi_device *dev,
        if (!devpriv->transfer_buffer)
                return -ENOMEM;
 
-       devpriv->probed = 1;
-
        /*
         * Request, and upload, the firmware so we can
         * complete the comedi_driver (*auto_attach).
@@ -1372,8 +1349,6 @@ static void usbduxfast_detach(struct comedi_device *dev)
        if (devpriv->intf)
                usb_set_intfdata(devpriv->intf, NULL);
 
-       devpriv->probed = 0;
-
        if (devpriv->urbIn) {
                /* waits until a running transfer is over */
                usb_kill_urb(devpriv->urbIn);