staging: comedi: comedi_pci: introduce comedi_pci_detach()

Introduce a generic (*detach) function for comedi PCI drivers to handle
the boilerplate code needed to detach a PCI driver.

This function works similar to comedi_legacy_detach() where it will:

  * free the dev->irq if it has been requested
  * iounmap the dev->mmio addres if it has been ioremap'ed

The helper then calls comedi_pci_disable() to release the regions and
disable the PCI device.

Use the new helper directly for the (*detach) in the following cases:

  * where comedi_pci_disable() is used directly for the (*detach)
  * where the detach function is just boilerplate

Use the new helper in the (*detach) of the simpler PCI drivers. Call
the helper after disabling interrupts (reset) and before any additional
cleanup (kfree) to avoid any race conditions with the interrupt handler.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/comedi_pci.c

@@ -17,6 +17,7 @@
  */
 
 #include <linux/pci.h>
+#include <linux/interrupt.h>
 
 #include "comedidev.h"
 
@@ -72,6 +73,29 @@ void comedi_pci_disable(struct comedi_device *dev)
 }
 EXPORT_SYMBOL_GPL(comedi_pci_disable);
 
+/**
+ * comedi_pci_detach() - A generic (*detach) function for PCI drivers.
+ * @dev: comedi_device struct
+ */
+void comedi_pci_detach(struct comedi_device *dev)
+{
+	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
+
+	if (!pcidev || !dev->ioenabled)
+		return;
+
+	if (dev->irq) {
+		free_irq(dev->irq, dev);
+		dev->irq = 0;
+	}
+	if (dev->mmio) {
+		iounmap(dev->mmio);
+		dev->mmio = NULL;
+	}
+	comedi_pci_disable(dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pci_detach);
+
 /**
  * comedi_pci_auto_config() - Configure/probe a comedi PCI driver.
  * @pcidev: pci_dev struct

drivers/staging/comedi/comedidev.h

@@ -509,6 +509,7 @@ struct pci_dev *comedi_to_pci_dev(struct comedi_device *);
 
 int comedi_pci_enable(struct comedi_device *);
 void comedi_pci_disable(struct comedi_device *);
+void comedi_pci_detach(struct comedi_device *);
 
 int comedi_pci_auto_config(struct pci_dev *, struct comedi_driver *,
 			   unsigned long context);
@@ -553,6 +554,10 @@ static inline void comedi_pci_disable(struct comedi_device *dev)
 {
 }
 
+static inline void comedi_pci_detach(struct comedi_device *dev)
+{
+}
+
 #endif /* CONFIG_COMEDI_PCI_DRIVERS */
 
 #ifdef CONFIG_COMEDI_PCMCIA_DRIVERS

drivers/staging/comedi/drivers/8255_pci.c

@@ -246,18 +246,11 @@ static int pci_8255_auto_attach(struct comedi_device *dev,
 	return 0;
 }
 
-static void pci_8255_detach(struct comedi_device *dev)
-{
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver pci_8255_driver = {
 	.driver_name	= "8255_pci",
 	.module		= THIS_MODULE,
 	.auto_attach	= pci_8255_auto_attach,
-	.detach		= pci_8255_detach,
+	.detach		= comedi_pci_detach,
 };
 
 static int pci_8255_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/addi-data/addi_common.c

@@ -268,13 +268,7 @@ static int addi_auto_attach(struct comedi_device *dev,
 
 static void i_ADDI_Detach(struct comedi_device *dev)
 {
-	struct addi_private *devpriv = dev->private;
-
-	if (devpriv) {
-		if (dev->iobase)
-			i_ADDI_Reset(dev);
-		if (dev->irq)
-			free_irq(dev->irq, dev);
-	}
-	comedi_pci_disable(dev);
+	if (dev->iobase)
+		i_ADDI_Reset(dev);
+	comedi_pci_detach(dev);
 }

drivers/staging/comedi/drivers/addi_apci_1032.c

@@ -343,9 +343,7 @@ static void apci1032_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci1032_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci1032_driver = {

drivers/staging/comedi/drivers/addi_apci_1516.c

@@ -190,7 +190,7 @@ static void apci1516_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci1516_reset(dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci1516_driver = {

drivers/staging/comedi/drivers/addi_apci_1564.c

@@ -442,9 +442,7 @@ static void apci1564_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci1564_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci1564_driver = {

drivers/staging/comedi/drivers/addi_apci_16xx.c

@@ -159,7 +159,7 @@ static struct comedi_driver apci16xx_driver = {
 	.driver_name	= "addi_apci_16xx",
 	.module		= THIS_MODULE,
 	.auto_attach	= apci16xx_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int apci16xx_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/addi_apci_2032.c

@@ -338,11 +338,9 @@ static void apci2032_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci2032_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
+	comedi_pci_detach(dev);
 	if (dev->read_subdev)
 		kfree(dev->read_subdev->private);
-	comedi_pci_disable(dev);
 }
 
 static struct comedi_driver apci2032_driver = {

drivers/staging/comedi/drivers/addi_apci_2200.c

@@ -118,7 +118,7 @@ static void apci2200_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci2200_reset(dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci2200_driver = {

drivers/staging/comedi/drivers/addi_apci_3120.c

@@ -195,11 +195,10 @@ static void apci3120_detach(struct comedi_device *dev)
 {
 	struct addi_private *devpriv = dev->private;
 
+	if (dev->iobase)
+		apci3120_reset(dev);
+	comedi_pci_detach(dev);
 	if (devpriv) {
-		if (dev->iobase)
-			apci3120_reset(dev);
-		if (dev->irq)
-			free_irq(dev->irq, dev);
 		if (devpriv->ul_DmaBufferVirtual[0]) {
 			free_pages((unsigned long)devpriv->
 				ul_DmaBufferVirtual[0],
@@ -211,7 +210,6 @@ static void apci3120_detach(struct comedi_device *dev)
 				devpriv->ui_DmaBufferPages[1]);
 		}
 	}
-	comedi_pci_disable(dev);
 }
 
 static struct comedi_driver apci3120_driver = {

drivers/staging/comedi/drivers/addi_apci_3501.c

@@ -417,9 +417,7 @@ static void apci3501_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		apci3501_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci3501_driver = {

drivers/staging/comedi/drivers/addi_apci_3xxx.c

@@ -910,17 +910,9 @@ static int apci3xxx_auto_attach(struct comedi_device *dev,
 
 static void apci3xxx_detach(struct comedi_device *dev)
 {
-	struct apci3xxx_private *devpriv = dev->private;
-
-	if (devpriv) {
-		if (dev->iobase)
-			apci3xxx_reset(dev);
-		if (dev->irq)
-			free_irq(dev->irq, dev);
-		if (dev->mmio)
-			iounmap(dev->mmio);
-	}
-	comedi_pci_disable(dev);
+	if (dev->iobase)
+		apci3xxx_reset(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver apci3xxx_driver = {

drivers/staging/comedi/drivers/adl_pci6208.c

@@ -208,7 +208,7 @@ static struct comedi_driver adl_pci6208_driver = {
 	.driver_name	= "adl_pci6208",
 	.module		= THIS_MODULE,
 	.auto_attach	= pci6208_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int adl_pci6208_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/adl_pci7x3x.c

@@ -246,7 +246,7 @@ static struct comedi_driver adl_pci7x3x_driver = {
 	.driver_name	= "adl_pci7x3x",
 	.module		= THIS_MODULE,
 	.auto_attach	= adl_pci7x3x_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int adl_pci7x3x_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/adl_pci8164.c

@@ -135,7 +135,7 @@ static struct comedi_driver adl_pci8164_driver = {
 	.driver_name	= "adl_pci8164",
 	.module		= THIS_MODULE,
 	.auto_attach	= adl_pci8164_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int adl_pci8164_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/adl_pci9111.c

@@ -781,9 +781,7 @@ static void pci9111_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		pci9111_reset(dev);
-	if (dev->irq != 0)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver adl_pci9111_driver = {

drivers/staging/comedi/drivers/adl_pci9118.c

@@ -2033,11 +2033,10 @@ static void pci9118_detach(struct comedi_device *dev)
 	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 	struct pci9118_private *devpriv = dev->private;
 
+	if (dev->iobase)
+		pci9118_reset(dev);
+	comedi_pci_detach(dev);
 	if (devpriv) {
-		if (dev->iobase)
-			pci9118_reset(dev);
-		if (dev->irq)
-			free_irq(dev->irq, dev);
 		if (devpriv->dmabuf_virt[0])
 			free_pages((unsigned long)devpriv->dmabuf_virt[0],
 				   devpriv->dmabuf_pages[0]);
@@ -2045,7 +2044,6 @@ static void pci9118_detach(struct comedi_device *dev)
 			free_pages((unsigned long)devpriv->dmabuf_virt[1],
 				   devpriv->dmabuf_pages[1]);
 	}
-	comedi_pci_disable(dev);
 	if (pcidev)
 		pci_dev_put(pcidev);
 }

drivers/staging/comedi/drivers/adv_pci1710.c

@@ -1250,9 +1250,7 @@ static void pci1710_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		pci1710_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver adv_pci1710_driver = {

drivers/staging/comedi/drivers/adv_pci1723.c

@@ -286,7 +286,7 @@ static void pci1723_detach(struct comedi_device *dev)
 {
 	if (dev->iobase)
 		pci1723_reset(dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver adv_pci1723_driver = {

drivers/staging/comedi/drivers/adv_pci1724.c

@@ -372,7 +372,7 @@ static struct comedi_driver adv_pci1724_driver = {
 	.driver_name = "adv_pci1724",
 	.module = THIS_MODULE,
 	.auto_attach = adv_pci1724_auto_attach,
-	.detach = comedi_pci_disable,
+	.detach = comedi_pci_detach,
 };
 
 static int adv_pci1724_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/adv_pci_dio.c

@@ -1170,7 +1170,7 @@ static void pci_dio_detach(struct comedi_device *dev)
 		if (devpriv->valid)
 			pci_dio_reset(dev);
 	}
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver adv_pci_dio_driver = {

drivers/staging/comedi/drivers/amplc_dio200_pci.c

@@ -387,20 +387,11 @@ static int dio200_pci_auto_attach(struct comedi_device *dev,
 	return amplc_dio200_common_attach(dev, pci_dev->irq, IRQF_SHARED);
 }
 
-static void dio200_pci_detach(struct comedi_device *dev)
-{
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver dio200_pci_comedi_driver = {
 	.driver_name	= "amplc_dio200_pci",
 	.module		= THIS_MODULE,
 	.auto_attach	= dio200_pci_auto_attach,
-	.detach		= dio200_pci_detach,
+	.detach		= comedi_pci_detach,
 };
 
 static const struct pci_device_id dio200_pci_table[] = {

drivers/staging/comedi/drivers/amplc_pci224.c

@@ -1130,13 +1130,11 @@ static void pci224_detach(struct comedi_device *dev)
 {
 	struct pci224_private *devpriv = dev->private;
 
-	if (dev->irq)
-		free_irq(dev->irq, dev);
+	comedi_pci_detach(dev);
 	if (devpriv) {
 		kfree(devpriv->ao_scan_vals);
 		kfree(devpriv->ao_scan_order);
 	}
-	comedi_pci_disable(dev);
 }
 
 static struct comedi_driver amplc_pci224_driver = {

drivers/staging/comedi/drivers/amplc_pci230.c

@@ -2830,9 +2830,7 @@ static void pci230_detach(struct comedi_device *dev)
 {
 	struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 	if (pcidev)
 		pci_dev_put(pcidev);
 }

drivers/staging/comedi/drivers/amplc_pci236.c

@@ -119,18 +119,11 @@ static int pci236_auto_attach(struct comedi_device *dev,
 					 IRQF_SHARED);
 }
 
-static void pci236_detach(struct comedi_device *dev)
-{
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver amplc_pci236_driver = {
 	.driver_name = "amplc_pci236",
 	.module = THIS_MODULE,
 	.auto_attach = pci236_auto_attach,
-	.detach = pci236_detach,
+	.detach = comedi_pci_detach,
 };
 
 static const struct pci_device_id pci236_pci_table[] = {

drivers/staging/comedi/drivers/amplc_pci263.c

@@ -86,7 +86,7 @@ static struct comedi_driver amplc_pci263_driver = {
 	.driver_name	= "amplc_pci263",
 	.module		= THIS_MODULE,
 	.auto_attach	= pci263_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static const struct pci_device_id pci263_pci_table[] = {

drivers/staging/comedi/drivers/cb_pcidas.c

@@ -1589,15 +1589,11 @@ static void cb_pcidas_detach(struct comedi_device *dev)
 {
 	struct cb_pcidas_private *devpriv = dev->private;
 
-	if (devpriv) {
-		if (devpriv->s5933_config) {
-			outl(INTCSR_INBOX_INTR_STATUS,
-			     devpriv->s5933_config + AMCC_OP_REG_INTCSR);
-		}
+	if (devpriv && devpriv->s5933_config) {
+		outl(INTCSR_INBOX_INTR_STATUS,
+		     devpriv->s5933_config + AMCC_OP_REG_INTCSR);
 	}
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver cb_pcidas_driver = {

drivers/staging/comedi/drivers/cb_pcidda.c

@@ -398,7 +398,7 @@ static struct comedi_driver cb_pcidda_driver = {
 	.driver_name	= "cb_pcidda",
 	.module		= THIS_MODULE,
 	.auto_attach	= cb_pcidda_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int cb_pcidda_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/cb_pcimdas.c

@@ -236,18 +236,11 @@ static int cb_pcimdas_auto_attach(struct comedi_device *dev,
 	return 0;
 }
 
-static void cb_pcimdas_detach(struct comedi_device *dev)
-{
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver cb_pcimdas_driver = {
 	.driver_name	= "cb_pcimdas",
 	.module		= THIS_MODULE,
 	.auto_attach	= cb_pcimdas_auto_attach,
-	.detach		= cb_pcimdas_detach,
+	.detach		= comedi_pci_detach,
 };
 
 static int cb_pcimdas_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/cb_pcimdda.c

@@ -176,7 +176,7 @@ static struct comedi_driver cb_pcimdda_driver = {
 	.driver_name	= "cb_pcimdda",
 	.module		= THIS_MODULE,
 	.auto_attach	= cb_pcimdda_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int cb_pcimdda_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/contec_pci_dio.c

@@ -97,7 +97,7 @@ static struct comedi_driver contec_pci_dio_driver = {
 	.driver_name	= "contec_pci_dio",
 	.module		= THIS_MODULE,
 	.auto_attach	= contec_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int contec_pci_dio_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/daqboard2000.c

@@ -727,15 +727,9 @@ static void daqboard2000_detach(struct comedi_device *dev)
 {
 	struct daqboard2000_private *devpriv = dev->private;
 
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	if (devpriv) {
-		if (dev->mmio)
-			iounmap(dev->mmio);
-		if (devpriv->plx)
-			iounmap(devpriv->plx);
-	}
-	comedi_pci_disable(dev);
+	if (devpriv && devpriv->plx)
+		iounmap(devpriv->plx);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver daqboard2000_driver = {

drivers/staging/comedi/drivers/das08_pci.c

@@ -77,7 +77,7 @@ static struct comedi_driver das08_pci_comedi_driver = {
 	.driver_name	= "pci-das08",
 	.module		= THIS_MODULE,
 	.auto_attach	= das08_pci_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int das08_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/dt3000.c

@@ -735,20 +735,11 @@ static int dt3000_auto_attach(struct comedi_device *dev,
 	return 0;
 }
 
-static void dt3000_detach(struct comedi_device *dev)
-{
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver dt3000_driver = {
 	.driver_name	= "dt3000",
 	.module		= THIS_MODULE,
 	.auto_attach	= dt3000_auto_attach,
-	.detach		= dt3000_detach,
+	.detach		= comedi_pci_detach,
 };
 
 static int dt3000_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/dyna_pci10xx.c

@@ -243,9 +243,9 @@ static void dyna_pci10xx_detach(struct comedi_device *dev)
 {
 	struct dyna_pci10xx_private *devpriv = dev->private;
 
+	comedi_pci_detach(dev);
 	if (devpriv)
 		mutex_destroy(&devpriv->mutex);
-	comedi_pci_disable(dev);
 }
 
 static struct comedi_driver dyna_pci10xx_driver = {

drivers/staging/comedi/drivers/icp_multi.c

@@ -542,11 +542,7 @@ static void icp_multi_detach(struct comedi_device *dev)
 	if (devpriv)
 		if (devpriv->valid)
 			icp_multi_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver icp_multi_driver = {

drivers/staging/comedi/drivers/ke_counter.c

@@ -212,7 +212,7 @@ static struct comedi_driver ke_counter_driver = {
 	.driver_name	= "ke_counter",
 	.module		= THIS_MODULE,
 	.auto_attach	= ke_counter_auto_attach,
-	.detach		= comedi_pci_disable,
+	.detach		= comedi_pci_detach,
 };
 
 static int ke_counter_pci_probe(struct pci_dev *dev,

drivers/staging/comedi/drivers/me4000.c

@@ -1516,11 +1516,9 @@ static int me4000_auto_attach(struct comedi_device *dev,
 
 static void me4000_detach(struct comedi_device *dev)
 {
-	if (dev->irq)
-		free_irq(dev->irq, dev);
 	if (dev->iobase)
 		me4000_reset(dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver me4000_driver = {

drivers/staging/comedi/drivers/me_daq.c

@@ -544,14 +544,12 @@ static void me_detach(struct comedi_device *dev)
 	struct me_private_data *dev_private = dev->private;
 
 	if (dev_private) {
-		if (dev->mmio) {
+		if (dev->mmio)
 			me_reset(dev);
-			iounmap(dev->mmio);
-		}
 		if (dev_private->plx_regbase)
 			iounmap(dev_private->plx_regbase);
 	}
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver me_daq_driver = {

drivers/staging/comedi/drivers/mf6x4.c

@@ -290,14 +290,13 @@ static void mf6x4_detach(struct comedi_device *dev)
 {
 	struct mf6x4_private *devpriv = dev->private;
 
-	if (devpriv->bar0_mem)
-		iounmap(devpriv->bar0_mem);
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	if (devpriv->bar2_mem)
-		iounmap(devpriv->bar2_mem);
-
-	comedi_pci_disable(dev);
+	if (devpriv) {
+		if (devpriv->bar0_mem)
+			iounmap(devpriv->bar0_mem);
+		if (devpriv->bar2_mem)
+			iounmap(devpriv->bar2_mem);
+	}
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver mf6x4_driver = {

drivers/staging/comedi/drivers/ni_6527.c

@@ -471,11 +471,7 @@ static void ni6527_detach(struct comedi_device *dev)
 {
 	if (dev->mmio)
 		ni6527_reset(dev);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver ni6527_driver = {

drivers/staging/comedi/drivers/ni_65xx.c

@@ -792,13 +792,9 @@ static int ni_65xx_auto_attach(struct comedi_device *dev,
 
 static void ni_65xx_detach(struct comedi_device *dev)
 {
-	if (dev->mmio) {
+	if (dev->mmio)
 		writeb(0x00, dev->mmio + NI_65XX_CTRL_REG);
-		iounmap(dev->mmio);
-	}
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
+	comedi_pci_detach(dev);
 }
 
 static struct comedi_driver ni_65xx_driver = {

drivers/staging/comedi/drivers/ni_670x.c

@@ -256,14 +256,12 @@ static void ni_670x_detach(struct comedi_device *dev)
 {
 	struct comedi_subdevice *s;
 
+	comedi_pci_detach(dev);
 	if (dev->n_subdevices) {
 		s = &dev->subdevices[0];
 		if (s)
 			kfree(s->range_table_list);
 	}
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	comedi_pci_disable(dev);
 }
 
 static struct comedi_driver ni_670x_driver = {

drivers/staging/comedi/drivers/ni_labpc_pci.c

@@ -108,20 +108,11 @@ static int labpc_pci_auto_attach(struct comedi_device *dev,
 	return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
 }
 
-static void labpc_pci_detach(struct comedi_device *dev)
-{
-	if (dev->mmio)
-		iounmap(dev->mmio);
-	if (dev->irq)
-		free_irq(dev->irq, dev);
-	comedi_pci_disable(dev);
-}
-
 static struct comedi_driver labpc_pci_comedi_driver = {
 	.driver_name	= "labpc_pci",
 	.module		= THIS_MODULE,
 	.auto_attach	= labpc_pci_auto_attach,
-	.detach		= labpc_pci_detach,
+	.detach		= comedi_pci_detach,
 };
 
 static const struct pci_device_id labpc_pci_table[] = {

drivers/staging/comedi/drivers/skel.c

@@ -640,7 +640,7 @@ static void skel_detach(struct comedi_device *dev)
 		 * If PCI device enabled by _auto_attach() (or _attach()),
 		 * disable it here.
 		 */
-		comedi_pci_disable(dev);
+		comedi_pci_detach(dev);
 	} else {
 		/*
 		 * ISA board