staging: comedi: Move pcm do_cmdtest function into a single source file

Many of the comedi source code has functions that were created with
cut and paste, this moves the do_cmdtest function into a single file.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

5 files changed, 124 insertions, 202 deletions

diff --git a/drivers/staging/comedi/drivers/Makefile b/drivers/staging/comedi/drivers/Makefile
index 4b56c07823b7..df2854d543cc 100644
--- a/drivers/staging/comedi/drivers/Makefile
+++ b/drivers/staging/comedi/drivers/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_COMEDI)			+= comedi_fc.o
 obj-$(CONFIG_COMEDI)			+= comedi_bond.o
 obj-$(CONFIG_COMEDI)			+= comedi_test.o
 obj-$(CONFIG_COMEDI)			+= comedi_parport.o
+obj-$(CONFIG_COMEDI)			+= pcm_common.o
 
 # Comedi PCI drivers
 obj-$(CONFIG_COMEDI_PCI_DRIVERS)	+= 8255.o
diff --git a/drivers/staging/comedi/drivers/pcm_common.c b/drivers/staging/comedi/drivers/pcm_common.c
new file mode 100644
index 000000000000..ebd9838232af
--- /dev/null
+++ b/drivers/staging/comedi/drivers/pcm_common.c
@@ -0,0 +1,111 @@
+#include "../comedidev.h"
+#include "pcm_common.h"
+
+/*
+ * 'do_cmdtest' function for an 'INTERRUPT' subdevice.  This is for
+ * the PCM drivers.
+ */
+int comedi_pcm_cmdtest(struct comedi_device *dev,
+		       struct comedi_subdevice *s, struct comedi_cmd *cmd)
+{
+	int err = 0;
+	unsigned int tmp;
+
+	/* step 1: make sure trigger sources are trivially valid */
+
+	tmp = cmd->start_src;
+	cmd->start_src &= (TRIG_NOW | TRIG_INT);
+	if (!cmd->start_src || tmp != cmd->start_src)
+		err++;
+
+	tmp = cmd->scan_begin_src;
+	cmd->scan_begin_src &= TRIG_EXT;
+	if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
+		err++;
+
+	tmp = cmd->convert_src;
+	cmd->convert_src &= TRIG_NOW;
+	if (!cmd->convert_src || tmp != cmd->convert_src)
+		err++;
+
+	tmp = cmd->scan_end_src;
+	cmd->scan_end_src &= TRIG_COUNT;
+	if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
+		err++;
+
+	tmp = cmd->stop_src;
+	cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
+	if (!cmd->stop_src || tmp != cmd->stop_src)
+		err++;
+
+	if (err)
+		return 1;
+
+	/* step 2: make sure trigger sources are unique and mutually compatible */
+
+	/* these tests are true if more than one _src bit is set */
+	if ((cmd->start_src & (cmd->start_src - 1)) != 0)
+		err++;
+	if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
+		err++;
+	if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
+		err++;
+	if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
+		err++;
+	if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
+		err++;
+
+	if (err)
+		return 2;
+
+	/* step 3: make sure arguments are trivially compatible */
+
+	/* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
+	if (cmd->start_arg != 0) {
+		cmd->start_arg = 0;
+		err++;
+	}
+
+	/* cmd->scan_begin_src == TRIG_EXT */
+	if (cmd->scan_begin_arg != 0) {
+		cmd->scan_begin_arg = 0;
+		err++;
+	}
+
+	/* cmd->convert_src == TRIG_NOW */
+	if (cmd->convert_arg != 0) {
+		cmd->convert_arg = 0;
+		err++;
+	}
+
+	/* cmd->scan_end_src == TRIG_COUNT */
+	if (cmd->scan_end_arg != cmd->chanlist_len) {
+		cmd->scan_end_arg = cmd->chanlist_len;
+		err++;
+	}
+
+	switch (cmd->stop_src) {
+	case TRIG_COUNT:
+		/* any count allowed */
+		break;
+	case TRIG_NONE:
+		if (cmd->stop_arg != 0) {
+			cmd->stop_arg = 0;
+			err++;
+		}
+		break;
+	default:
+		break;
+	}
+
+	if (err)
+		return 3;
+
+	/* step 4: fix up any arguments */
+
+	/* if (err) return 4; */
+
+	return 0;
+}
+
+EXPORT_SYMBOL(comedi_pcm_cmdtest);
diff --git a/drivers/staging/comedi/drivers/pcm_common.h b/drivers/staging/comedi/drivers/pcm_common.h
new file mode 100644
index 000000000000..cd4840c11444
--- /dev/null
+++ b/drivers/staging/comedi/drivers/pcm_common.h
@@ -0,0 +1,8 @@
+#ifndef _comedi_common_H
+#define _comedi_common_H
+
+extern int comedi_pcm_cmdtest(struct comedi_device *dev,
+			      struct comedi_subdevice *s,
+			      struct comedi_cmd *cmd);
+
+#endif
diff --git a/drivers/staging/comedi/drivers/pcmmio.c b/drivers/staging/comedi/drivers/pcmmio.c
index e1ad03e234b7..cdf501afa14e 100644
--- a/drivers/staging/comedi/drivers/pcmmio.c
+++ b/drivers/staging/comedi/drivers/pcmmio.c
@@ -75,6 +75,7 @@ Configuration Options:
 
 #include <linux/interrupt.h>
 #include "../comedidev.h"
+#include "pcm_common.h"
 #include <linux/pci.h>		/* for PCI devices */
 
 /* This stuff is all from pcmuio.c -- it refers to the DIO subdevices only */
@@ -1073,110 +1074,10 @@ static int pcmmio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	return 0;
 }
 
-/*
- * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
- */
 static int
 pcmmio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd)
 {
-	int err = 0;
-	unsigned int tmp;
-
-	/* step 1: make sure trigger sources are trivially valid */
-
-	tmp = cmd->start_src;
-	cmd->start_src &= (TRIG_NOW | TRIG_INT);
-	if (!cmd->start_src || tmp != cmd->start_src)
-		err++;
-
-	tmp = cmd->scan_begin_src;
-	cmd->scan_begin_src &= TRIG_EXT;
-	if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
-		err++;
-
-	tmp = cmd->convert_src;
-	cmd->convert_src &= TRIG_NOW;
-	if (!cmd->convert_src || tmp != cmd->convert_src)
-		err++;
-
-	tmp = cmd->scan_end_src;
-	cmd->scan_end_src &= TRIG_COUNT;
-	if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
-		err++;
-
-	tmp = cmd->stop_src;
-	cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
-	if (!cmd->stop_src || tmp != cmd->stop_src)
-		err++;
-
-	if (err)
-		return 1;
-
-	/* step 2: make sure trigger sources are unique and mutually compatible */
-
-	/* these tests are true if more than one _src bit is set */
-	if ((cmd->start_src & (cmd->start_src - 1)) != 0)
-		err++;
-	if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
-		err++;
-	if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
-		err++;
-	if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
-		err++;
-	if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
-		err++;
-
-	if (err)
-		return 2;
-
-	/* step 3: make sure arguments are trivially compatible */
-
-	/* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
-	if (cmd->start_arg != 0) {
-		cmd->start_arg = 0;
-		err++;
-	}
-
-	/* cmd->scan_begin_src == TRIG_EXT */
-	if (cmd->scan_begin_arg != 0) {
-		cmd->scan_begin_arg = 0;
-		err++;
-	}
-
-	/* cmd->convert_src == TRIG_NOW */
-	if (cmd->convert_arg != 0) {
-		cmd->convert_arg = 0;
-		err++;
-	}
-
-	/* cmd->scan_end_src == TRIG_COUNT */
-	if (cmd->scan_end_arg != cmd->chanlist_len) {
-		cmd->scan_end_arg = cmd->chanlist_len;
-		err++;
-	}
-
-	switch (cmd->stop_src) {
-	case TRIG_COUNT:
-		/* any count allowed */
-		break;
-	case TRIG_NONE:
-		if (cmd->stop_arg != 0) {
-			cmd->stop_arg = 0;
-			err++;
-		}
-		break;
-	default:
-		break;
-	}
-
-	if (err)
-		return 3;
-
-	/* step 4: fix up any arguments */
-
-	/* if (err) return 4; */
-
-	return 0;
+	return comedi_pcm_cmdtest(dev, s, cmd);
 }
 
 static int adc_wait_ready(unsigned long iobase)
diff --git a/drivers/staging/comedi/drivers/pcmuio.c b/drivers/staging/comedi/drivers/pcmuio.c
index ce0aa6b87fb0..81ee7cdc0caf 100644
--- a/drivers/staging/comedi/drivers/pcmuio.c
+++ b/drivers/staging/comedi/drivers/pcmuio.c
@@ -77,6 +77,7 @@ Configuration Options:
 
 #include <linux/interrupt.h>
 #include "../comedidev.h"
+#include "pcm_common.h"
 
 #include <linux/pci.h>		/* for PCI devices */
 
@@ -984,110 +985,10 @@ static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 	return 0;
 }
 
-/*
- * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
- */
 static int
 pcmuio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd)
 {
-	int err = 0;
-	unsigned int tmp;
-
-	/* step 1: make sure trigger sources are trivially valid */
-
-	tmp = cmd->start_src;
-	cmd->start_src &= (TRIG_NOW | TRIG_INT);
-	if (!cmd->start_src || tmp != cmd->start_src)
-		err++;
-
-	tmp = cmd->scan_begin_src;
-	cmd->scan_begin_src &= TRIG_EXT;
-	if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
-		err++;
-
-	tmp = cmd->convert_src;
-	cmd->convert_src &= TRIG_NOW;
-	if (!cmd->convert_src || tmp != cmd->convert_src)
-		err++;
-
-	tmp = cmd->scan_end_src;
-	cmd->scan_end_src &= TRIG_COUNT;
-	if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
-		err++;
-
-	tmp = cmd->stop_src;
-	cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
-	if (!cmd->stop_src || tmp != cmd->stop_src)
-		err++;
-
-	if (err)
-		return 1;
-
-	/* step 2: make sure trigger sources are unique and mutually compatible */
-
-	/* these tests are true if more than one _src bit is set */
-	if ((cmd->start_src & (cmd->start_src - 1)) != 0)
-		err++;
-	if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
-		err++;
-	if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
-		err++;
-	if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
-		err++;
-	if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
-		err++;
-
-	if (err)
-		return 2;
-
-	/* step 3: make sure arguments are trivially compatible */
-
-	/* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
-	if (cmd->start_arg != 0) {
-		cmd->start_arg = 0;
-		err++;
-	}
-
-	/* cmd->scan_begin_src == TRIG_EXT */
-	if (cmd->scan_begin_arg != 0) {
-		cmd->scan_begin_arg = 0;
-		err++;
-	}
-
-	/* cmd->convert_src == TRIG_NOW */
-	if (cmd->convert_arg != 0) {
-		cmd->convert_arg = 0;
-		err++;
-	}
-
-	/* cmd->scan_end_src == TRIG_COUNT */
-	if (cmd->scan_end_arg != cmd->chanlist_len) {
-		cmd->scan_end_arg = cmd->chanlist_len;
-		err++;
-	}
-
-	switch (cmd->stop_src) {
-	case TRIG_COUNT:
-		/* any count allowed */
-		break;
-	case TRIG_NONE:
-		if (cmd->stop_arg != 0) {
-			cmd->stop_arg = 0;
-			err++;
-		}
-		break;
-	default:
-		break;
-	}
-
-	if (err)
-		return 3;
-
-	/* step 4: fix up any arguments */
-
-	/* if (err) return 4; */
-
-	return 0;
+	return comedi_pcm_cmdtest(dev, s, cmd);
 }
 
 /*