staging: comedi: addi_apci_2032: remove use of struct addi_private

The only data in addi_private used in this driver is:

tsk_Current - used with send_sig to signal userspace when an interrupt
has occurred. Interrupt support in this driver does not follow the
standard comedi API so this functionality is currently broken. This
will be addressed.

b_OutputMemoryStatus - used in the addi-data "common" code to enable
reading of the eeprom. Eeprom support is not needed by this driver
and has been removed.

Since this data is not needed, remove the use of struct addi_private.

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>

drivers/staging/comedi/drivers/addi_apci_2032.c

@@ -63,22 +63,14 @@ static int i_APCI2032_ConfigDigitalOutput(struct comedi_device *dev,
 					  struct comedi_insn *insn,
 					  unsigned int *data)
 {
-	struct addi_private *devpriv = dev->private;
 	unsigned int ul_Command = 0;
 
-	devpriv->tsk_Current = current;
-
 	if ((data[0] != 0) && (data[0] != 1)) {
 		comedi_error(dev,
 			"Not a valid Data !!! ,Data should be 1 or 0\n");
 		return -EINVAL;
 	}
 
-	if (data[0])
-		devpriv->b_OutputMemoryStatus = ADDIDATA_ENABLE;
-	else
-		devpriv->b_OutputMemoryStatus = ADDIDATA_DISABLE;
-
 	if (data[1] == ADDIDATA_ENABLE)
 		ul_Command |= APCI2032_INT_CTRL_VCC_ENA;
 	else
@@ -181,7 +173,6 @@ static int i_APCI2032_ReadInterruptStatus(struct comedi_device *dev,
 static void v_APCI2032_Interrupt(int irq, void *d)
 {
 	struct comedi_device *dev = d;
-	struct addi_private *devpriv = dev->private;
 	unsigned int ui_DO;
 
 	/* Check if VCC OR CC interrupt has occurred */
@@ -197,7 +188,7 @@ static void v_APCI2032_Interrupt(int irq, void *d)
 		outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
 
 		if (ui_Type)
-			send_sig(SIGIO, devpriv->tsk_Current, 0);
+			; /* send an event to indicate the interrupt */
 	}
 }
 
@@ -209,9 +200,6 @@ static irqreturn_t v_ADDI_Interrupt(int irq, void *d)
 
 static int apci2032_reset(struct comedi_device *dev)
 {
-	struct addi_private *devpriv = dev->private;
-
-	devpriv->b_DigitalOutputRegister = 0;
 	ui_Type = 0;
 	outl(0x0, dev->iobase + APCI2032_DO_REG);
 	outl(0x0, dev->iobase + APCI2032_INT_CTRL_REG);
@@ -225,17 +213,11 @@ static int apci2032_auto_attach(struct comedi_device *dev,
 				unsigned long context_unused)
 {
 	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
-	struct addi_private *devpriv;
 	struct comedi_subdevice *s;
 	int ret;
 
 	dev->board_name = dev->driver->driver_name;
 
-	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
-	if (!devpriv)
-		return -ENOMEM;
-	dev->private = devpriv;
-
 	ret = comedi_pci_enable(pcidev, dev->board_name);
 	if (ret)
 		return ret;
@@ -282,14 +264,11 @@ static int apci2032_auto_attach(struct comedi_device *dev,
 static void apci2032_detach(struct comedi_device *dev)
 {
 	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
-	struct addi_private *devpriv = dev->private;
 
-	if (devpriv) {
-		if (dev->iobase)
-			apci2032_reset(dev);
-		if (dev->irq)
-			free_irq(dev->irq, dev);
-	}
+	if (dev->iobase)
+		apci2032_reset(dev);
+	if (dev->irq)
+		free_irq(dev->irq, dev);
 	if (pcidev) {
 		if (dev->iobase)
 			comedi_pci_disable(pcidev);