From a3ac95195b020a0a8fa2a9b0649145324ba64c83 Mon Sep 17 00:00:00 2001
From: H Hartley Sweeten <hsweeten@visionengravers.com>
Date: Tue, 5 Feb 2013 18:16:07 -0700
Subject: staging: comedi: comedi_pcmcia: allow drivers to use a custom
 conf_check()

Allow comedi pcmcia drivers to use a custom conf_check() when calling
comedi_pcmcia_enable() to enable the pcmcia device. If a conf_check()
is not passed the internal comedi_pcmcia_conf_check() will be used.

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/comedi_pcmcia.c b/drivers/staging/comedi/comedi_pcmcia.c
index 925f128..453ff3b 100644
--- a/drivers/staging/comedi/comedi_pcmcia.c
+++ b/drivers/staging/comedi/comedi_pcmcia.c
@@ -49,12 +49,14 @@ static int comedi_pcmcia_conf_check(struct pcmcia_device *link,
 /**
  * comedi_pcmcia_enable() - Request the regions and enable the PCMCIA device.
  * @dev: comedi_device struct
+ * @conf_check: optional callback to check the pcmcia_device configuration
  *
  * The comedi PCMCIA driver needs to set the link->config_flags, as
  * appropriate for that driver, before calling this function in order
  * to allow pcmcia_loop_config() to do its internal autoconfiguration.
  */
-int comedi_pcmcia_enable(struct comedi_device *dev)
+int comedi_pcmcia_enable(struct comedi_device *dev,
+			 int (*conf_check)(struct pcmcia_device *, void *))
 {
 	struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
 	int ret;
@@ -62,7 +64,10 @@ int comedi_pcmcia_enable(struct comedi_device *dev)
 	if (!link)
 		return -ENODEV;
 
-	ret = pcmcia_loop_config(link, comedi_pcmcia_conf_check, NULL);
+	if (!conf_check)
+		conf_check = comedi_pcmcia_conf_check;
+
+	ret = pcmcia_loop_config(link, conf_check, NULL);
 	if (ret)
 		return ret;
 
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index d921cd7..f3a990b 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -440,7 +440,8 @@ struct pcmcia_device;
 
 struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *);
 
-int comedi_pcmcia_enable(struct comedi_device *);
+int comedi_pcmcia_enable(struct comedi_device *,
+			 int (*conf_check)(struct pcmcia_device *, void *));
 void comedi_pcmcia_disable(struct comedi_device *);
 
 int comedi_pcmcia_auto_config(struct pcmcia_device *, struct comedi_driver *);
diff --git a/drivers/staging/comedi/drivers/cb_das16_cs.c b/drivers/staging/comedi/drivers/cb_das16_cs.c
index 5bbffd9..f874fff 100644
--- a/drivers/staging/comedi/drivers/cb_das16_cs.c
+++ b/drivers/staging/comedi/drivers/cb_das16_cs.c
@@ -413,7 +413,7 @@ static int das16cs_auto_attach(struct comedi_device *dev,
 	dev->board_name = board->name;
 
 	link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
-	ret = comedi_pcmcia_enable(dev);
+	ret = comedi_pcmcia_enable(dev, NULL);
 	if (ret)
 		return ret;
 	dev->iobase = link->resource[0]->start;
diff --git a/drivers/staging/comedi/drivers/das08_cs.c b/drivers/staging/comedi/drivers/das08_cs.c
index 818a609..cfeebe4 100644
--- a/drivers/staging/comedi/drivers/das08_cs.c
+++ b/drivers/staging/comedi/drivers/das08_cs.c
@@ -81,7 +81,7 @@ static int das08_cs_auto_attach(struct comedi_device *dev,
 	dev->board_ptr = &das08_cs_boards[0];
 
 	link->config_flags |= CONF_AUTO_SET_IO;
-	ret = comedi_pcmcia_enable(dev);
+	ret = comedi_pcmcia_enable(dev, NULL);
 	if (ret)
 		return ret;
 	iobase = link->resource[0]->start;
diff --git a/drivers/staging/comedi/drivers/ni_daq_700.c b/drivers/staging/comedi/drivers/ni_daq_700.c
index c8f4c7d..9cc6092 100644
--- a/drivers/staging/comedi/drivers/ni_daq_700.c
+++ b/drivers/staging/comedi/drivers/ni_daq_700.c
@@ -205,7 +205,7 @@ static int daq700_auto_attach(struct comedi_device *dev,
 	dev->board_name = dev->driver->driver_name;
 
 	link->config_flags |= CONF_AUTO_SET_IO;
-	ret = comedi_pcmcia_enable(dev);
+	ret = comedi_pcmcia_enable(dev, NULL);
 	if (ret)
 		return ret;
 	dev->iobase = link->resource[0]->start;
diff --git a/drivers/staging/comedi/drivers/ni_daq_dio24.c b/drivers/staging/comedi/drivers/ni_daq_dio24.c
index edfbfb3..32ee22d 100644
--- a/drivers/staging/comedi/drivers/ni_daq_dio24.c
+++ b/drivers/staging/comedi/drivers/ni_daq_dio24.c
@@ -55,7 +55,7 @@ static int dio24_auto_attach(struct comedi_device *dev,
 	dev->board_name = dev->driver->driver_name;
 
 	link->config_flags |= CONF_AUTO_SET_IO;
-	ret = comedi_pcmcia_enable(dev);
+	ret = comedi_pcmcia_enable(dev, NULL);
 		return ret;
 	dev->iobase = link->resource[0]->start;
 
diff --git a/drivers/staging/comedi/drivers/ni_labpc_cs.c b/drivers/staging/comedi/drivers/ni_labpc_cs.c
index 1c55de3..be7d141 100644
--- a/drivers/staging/comedi/drivers/ni_labpc_cs.c
+++ b/drivers/staging/comedi/drivers/ni_labpc_cs.c
@@ -99,7 +99,7 @@ static int labpc_auto_attach(struct comedi_device *dev,
 
 	link->config_flags |= CONF_AUTO_SET_IO |
 			      CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
-	ret = comedi_pcmcia_enable(dev);
+	ret = comedi_pcmcia_enable(dev, NULL);
 	if (ret)
 		return ret;
 	dev->iobase = link->resource[0]->start;
-- 
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