staging: dgnc: remove crazy "management" device node

There's no need for a special character device just to get some random
information out of a single serial port driver.  So remove the
dgnc_mgmt.c file, and some structures and ioctl definitions that only it
was using.

Cc: Lidza Louina <lidza.louina@gmail.com>
Cc: Mark Hounschell <markh@compro.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/dgnc/Makefile

 obj-$(CONFIG_DGNC) += dgnc.o
 
 dgnc-objs :=   dgnc_cls.o dgnc_driver.o\
-               dgnc_mgmt.o dgnc_neo.o\
+               dgnc_neo.o\
                dgnc_tty.o

drivers/staging/dgnc/dgnc_driver.c

@@ -11,7 +11,6 @@
 #include <linux/sched.h>
 #include "dgnc_driver.h"
 #include "dgnc_pci.h"
-#include "dgnc_mgmt.h"
 #include "dgnc_tty.h"
 #include "dgnc_cls.h"
 #include "dgnc_neo.h"
@@ -21,22 +20,12 @@ MODULE_AUTHOR("Digi International, http://www.digi.com");
 MODULE_DESCRIPTION("Driver for the Digi International Neo and Classic PCI based product line");
 MODULE_SUPPORTED_DEVICE("dgnc");
 
-static const struct file_operations dgnc_board_fops = {
-	.owner		=	THIS_MODULE,
-	.unlocked_ioctl =	dgnc_mgmt_ioctl,
-	.open		=	dgnc_mgmt_open,
-	.release	=	dgnc_mgmt_close
-};
-
 uint			dgnc_num_boards;
 struct dgnc_board		*dgnc_board[MAXBOARDS];
 DEFINE_SPINLOCK(dgnc_global_lock);
 DEFINE_SPINLOCK(dgnc_poll_lock); /* Poll scheduling lock */
-uint			dgnc_major;
 int			dgnc_poll_tick = 20;	/* Poll interval - 20 ms */
 
-static struct class *dgnc_class;
-
 static ulong		dgnc_poll_time; /* Time of next poll */
 static uint		dgnc_poll_stop; /* Used to tell poller to stop */
 static struct timer_list dgnc_poll_timer;
@@ -379,32 +368,7 @@ static struct pci_driver dgnc_driver = {
 
 static int dgnc_start(void)
 {
-	int rc = 0;
 	unsigned long flags;
-	struct device *dev;
-
-	rc = register_chrdev(0, "dgnc", &dgnc_board_fops);
-	if (rc < 0) {
-		pr_err(DRVSTR ": Can't register dgnc driver device (%d)\n", rc);
-		return rc;
-	}
-	dgnc_major = rc;
-
-	dgnc_class = class_create(THIS_MODULE, "dgnc_mgmt");
-	if (IS_ERR(dgnc_class)) {
-		rc = PTR_ERR(dgnc_class);
-		pr_err(DRVSTR ": Can't create dgnc_mgmt class (%d)\n", rc);
-		goto failed_class;
-	}
-
-	dev = device_create(dgnc_class, NULL,
-			    MKDEV(dgnc_major, 0),
-			NULL, "dgnc_mgmt");
-	if (IS_ERR(dev)) {
-		rc = PTR_ERR(dev);
-		pr_err(DRVSTR ": Can't create device (%d)\n", rc);
-		goto failed_device;
-	}
 
 	/* Start the poller */
 	spin_lock_irqsave(&dgnc_poll_lock, flags);
@@ -416,13 +380,6 @@ static int dgnc_start(void)
 	add_timer(&dgnc_poll_timer);
 
 	return 0;
-
-failed_device:
-	class_destroy(dgnc_class);
-failed_class:
-	unregister_chrdev(dgnc_major, "dgnc");
-
-	return rc;
 }
 
 /* Free all the memory associated with a board */
@@ -486,10 +443,6 @@ static void cleanup(void)
 	/* Turn off poller right away. */
 	del_timer_sync(&dgnc_poll_timer);
 
-	device_destroy(dgnc_class, MKDEV(dgnc_major, 0));
-	class_destroy(dgnc_class);
-	unregister_chrdev(dgnc_major, "dgnc");
-
 	for (i = 0; i < dgnc_num_boards; ++i) {
 		dgnc_cleanup_tty(dgnc_board[i]);
 		dgnc_cleanup_board(dgnc_board[i]);

drivers/staging/dgnc/dgnc_mgmt.c

-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright 2003 Digi International (www.digi.com)
- *	Scott H Kilau <Scott_Kilau at digi dot com>
- */
-
-/*
- * This file implements the mgmt functionality for the
- * Neo and ClassicBoard based product lines.
- */
-
-#include <linux/kernel.h>
-#include <linux/ctype.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/serial_reg.h>
-#include <linux/termios.h>
-#include <linux/uaccess.h>
-
-#include "dgnc_driver.h"
-#include "dgnc_pci.h"
-#include "dgnc_mgmt.h"
-
-/* Our "in use" variables, to enforce 1 open only */
-static int dgnc_mgmt_in_use[MAXMGMTDEVICES];
-
-/**
- * dgnc_mgmt_open() - Open the mgmt/downld/dpa device.
- */
-int dgnc_mgmt_open(struct inode *inode, struct file *file)
-{
-	unsigned long flags;
-	unsigned int minor = iminor(inode);
-	int rc = 0;
-
-	spin_lock_irqsave(&dgnc_global_lock, flags);
-
-	if (minor >= MAXMGMTDEVICES) {
-		rc = -ENXIO;
-		goto out;
-	}
-	/* Only allow 1 open at a time on mgmt device */
-	if (dgnc_mgmt_in_use[minor]) {
-		rc = -EBUSY;
-		goto out;
-	}
-	dgnc_mgmt_in_use[minor]++;
-
-out:
-	spin_unlock_irqrestore(&dgnc_global_lock, flags);
-
-	return rc;
-}
-
-/**
- * dgnc_mgmt_close() - Close the mgmt/dpa device
- */
-int dgnc_mgmt_close(struct inode *inode, struct file *file)
-{
-	unsigned long flags;
-	unsigned int minor = iminor(inode);
-	int rc = 0;
-
-	spin_lock_irqsave(&dgnc_global_lock, flags);
-
-	if (minor >= MAXMGMTDEVICES) {
-		rc = -ENXIO;
-		goto out;
-	}
-	dgnc_mgmt_in_use[minor] = 0;
-
-out:
-	spin_unlock_irqrestore(&dgnc_global_lock, flags);
-
-	return rc;
-}
-
-/**
- * dgnc_mgmt_ioctl() - Ioctl the mgmt/dpa device.
- */
-long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	unsigned long flags;
-	void __user *uarg = (void __user *)arg;
-
-	switch (cmd) {
-	case DIGI_GETDD:
-	{
-		/*
-		 * This returns the total number of boards
-		 * in the system, as well as driver version
-		 * and has space for a reserved entry
-		 */
-		struct digi_dinfo ddi;
-
-		spin_lock_irqsave(&dgnc_global_lock, flags);
-
-		memset(&ddi, 0, sizeof(ddi));
-		ddi.dinfo_nboards = dgnc_num_boards;
-		sprintf(ddi.dinfo_version, "%s", DG_PART);
-
-		spin_unlock_irqrestore(&dgnc_global_lock, flags);
-
-		if (copy_to_user(uarg, &ddi, sizeof(ddi)))
-			return -EFAULT;
-
-		break;
-	}
-
-	case DIGI_GETBD:
-	{
-		int brd;
-
-		struct digi_info di;
-
-		if (copy_from_user(&brd, uarg, sizeof(int)))
-			return -EFAULT;
-
-		if (brd < 0 || brd >= dgnc_num_boards)
-			return -ENODEV;
-
-		memset(&di, 0, sizeof(di));
-
-		di.info_bdnum = brd;
-
-		spin_lock_irqsave(&dgnc_board[brd]->bd_lock, flags);
-
-		di.info_bdtype = dgnc_board[brd]->dpatype;
-		di.info_bdstate = dgnc_board[brd]->dpastatus;
-		di.info_ioport = 0;
-		di.info_physaddr = (ulong)dgnc_board[brd]->membase;
-		di.info_physsize = (ulong)dgnc_board[brd]->membase
-			- dgnc_board[brd]->membase_end;
-		if (dgnc_board[brd]->state != BOARD_FAILED)
-			di.info_nports = dgnc_board[brd]->nasync;
-		else
-			di.info_nports = 0;
-
-		spin_unlock_irqrestore(&dgnc_board[brd]->bd_lock, flags);
-
-		if (copy_to_user(uarg, &di, sizeof(di)))
-			return -EFAULT;
-
-		break;
-	}
-
-	case DIGI_GET_NI_INFO:
-	{
-		struct channel_t *ch;
-		struct ni_info ni;
-		unsigned char mstat = 0;
-		uint board = 0;
-		uint channel = 0;
-
-		if (copy_from_user(&ni, uarg, sizeof(ni)))
-			return -EFAULT;
-
-		board = ni.board;
-		channel = ni.channel;
-
-		if (board >= dgnc_num_boards)
-			return -ENODEV;
-
-		if (channel >= dgnc_board[board]->nasync)
-			return -ENODEV;
-
-		ch = dgnc_board[board]->channels[channel];
-
-		if (!ch)
-			return -ENODEV;
-
-		memset(&ni, 0, sizeof(ni));
-		ni.board = board;
-		ni.channel = channel;
-
-		spin_lock_irqsave(&ch->ch_lock, flags);
-
-		mstat = ch->ch_mostat | ch->ch_mistat;
-
-		if (mstat & UART_MCR_DTR) {
-			ni.mstat |= TIOCM_DTR;
-			ni.dtr = TIOCM_DTR;
-		}
-		if (mstat & UART_MCR_RTS) {
-			ni.mstat |= TIOCM_RTS;
-			ni.rts = TIOCM_RTS;
-		}
-		if (mstat & UART_MSR_CTS) {
-			ni.mstat |= TIOCM_CTS;
-			ni.cts = TIOCM_CTS;
-		}
-		if (mstat & UART_MSR_RI) {
-			ni.mstat |= TIOCM_RI;
-			ni.ri = TIOCM_RI;
-		}
-		if (mstat & UART_MSR_DCD) {
-			ni.mstat |= TIOCM_CD;
-			ni.dcd = TIOCM_CD;
-		}
-		if (mstat & UART_MSR_DSR)
-			ni.mstat |= TIOCM_DSR;
-
-		ni.iflag = ch->ch_c_iflag;
-		ni.oflag = ch->ch_c_oflag;
-		ni.cflag = ch->ch_c_cflag;
-		ni.lflag = ch->ch_c_lflag;
-
-		if (ch->ch_digi.digi_flags & CTSPACE ||
-		    ch->ch_c_cflag & CRTSCTS)
-			ni.hflow = 1;
-		else
-			ni.hflow = 0;
-
-		if ((ch->ch_flags & CH_STOPI) ||
-		    (ch->ch_flags & CH_FORCED_STOPI))
-			ni.recv_stopped = 1;
-		else
-			ni.recv_stopped = 0;
-
-		if ((ch->ch_flags & CH_STOP) || (ch->ch_flags & CH_FORCED_STOP))
-			ni.xmit_stopped = 1;
-		else
-			ni.xmit_stopped = 0;
-
-		ni.curtx = ch->ch_txcount;
-		ni.currx = ch->ch_rxcount;
-
-		ni.baud = ch->ch_old_baud;
-
-		spin_unlock_irqrestore(&ch->ch_lock, flags);
-
-		if (copy_to_user(uarg, &ni, sizeof(ni)))
-			return -EFAULT;
-
-		break;
-	}
-	}
-	return 0;
-}

drivers/staging/dgnc/dgnc_mgmt.h

-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright 2003 Digi International (www.digi.com)
- *	Scott H Kilau <Scott_Kilau at digi dot com>
- */
-
-#ifndef _DGNC_MGMT_H
-#define _DGNC_MGMT_H
-
-#define MAXMGMTDEVICES 8
-
-int dgnc_mgmt_open(struct inode *inode, struct file *file);
-int dgnc_mgmt_close(struct inode *inode, struct file *file);
-long dgnc_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
-
-#endif	/* _DGNC_MGMT_H */
-

drivers/staging/dgnc/digi.h

@@ -35,7 +35,6 @@
 #define DIGI_SETA	(('e' << 8) | 95)	/* Set params */
 #define DIGI_SETAW	(('e' << 8) | 96)	/* Drain & set params */
 #define DIGI_SETAF	(('e' << 8) | 97)	/* Drain, flush & set params */
-#define DIGI_GET_NI_INFO (('d' << 8) | 250)	/* Non-intelligent state info */
 #define DIGI_LOOPBACK (('d' << 8) | 252)	/* Enable/disable UART
 						 * internal loopback
 						 */
@@ -78,49 +77,6 @@ struct digi_t {
 	char		digi_term[DIGI_TSIZ];
 };
 
-/**
- * struct digi_dinfo - Driver status information.
- * @dinfo_nboards: Number of boards configured.
- * @dinfo_reserved: Not used, for future expansion.
- * @dinfio_version: Driver version.
- */
-struct digi_dinfo {
-	unsigned int	dinfo_nboards;
-	char		dinfo_reserved[12];
-	char		dinfo_version[16];
-};
-
-#define	DIGI_GETDD	(('d' << 8) | 248)	/* get driver info */
-
-/**
- * struct digi_info - Ioctl commands for per board information.
- *
- * Physsize and memsize differ when board has "windowed" memory.
- *
- * @info_bdnum: Board number (0 based).
- * @info_ioport: IO port address.
- * @indo_physaddr: Memory address.
- * @info_physize: Size of host memory window.
- * @info_memsize: Amount of dual-port memory on board.
- * @info_bdtype: Board type.
- * @info_nports: Number of ports.
- * @info_bdstate: Board state.
- * @info_reserved: Not used, for future expansion.
- */
-struct digi_info {
-	unsigned int	info_bdnum;
-	unsigned int	info_ioport;
-	unsigned int	info_physaddr;
-	unsigned int	info_physsize;
-	unsigned int	info_memsize;
-	unsigned short	info_bdtype;
-	unsigned short	info_nports;
-	char		info_bdstate;
-	char		info_reserved[7];
-};
-
-#define	DIGI_GETBD	(('d' << 8) | 249)	/* get board info */
-
 /**
  * struct digi_getbuffer - Holds buffer use counts.
  */