scsi: dpt_i2o: Remove obsolete driver

The dpt_i2o driver was fixed to stop using virt_to_bus() in 2008, but it
still has a stale reference in an error handling code path that could never
work. I submitted a patch to fix this reference earlier, but Hannes
Reinecke suggested that removing the driver may be just as good here.

The i2o driver layer was removed in 2015 with commit 4a72a7af
("staging: remove i2o subsystem"), but the even older dpt_i2o scsi driver
stayed around.

The last non-cleanup patches I could find were from Miquel van Smoorenburg
and Mark Salyzyn back in 2008, they might know if there is any chance of
the hardware still being used anywhere.

Link: https://lore.kernel.org/linux-scsi/CAK8P3a1XfwkTOV7qOs1fTxf4vthNBRXKNu8A5V7TWnHT081NGA@mail.gmail.com/T/
Link: https://lore.kernel.org/r/20220624155226.2889613-3-arnd@kernel.org
Cc: Miquel van Smoorenburg <mikevs@xs4all.net>
Cc: Mark Salyzyn <salyzyn@android.com>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Documentation/userspace-api/ioctl/ioctl-number.rst

@@ -120,7 +120,7 @@ Code  Seq#    Include File                                           Comments
 'C'   01-2F  linux/capi.h                                            conflict!
 'C'   F0-FF  drivers/net/wan/cosa.h                                  conflict!
 'D'   all    arch/s390/include/asm/dasd.h
-'D'   40-5F  drivers/scsi/dpt/dtpi_ioctl.h
+'D'   40-5F  drivers/scsi/dpt/dtpi_ioctl.h                           Dead since 2022
 'D'   05     drivers/scsi/pmcraid.h
 'E'   all    linux/input.h                                           conflict!
 'E'   00-0F  xen/evtchn.h                                            conflict!

MAINTAINERS

@@ -6116,14 +6116,6 @@ F:	Documentation/networking/device_drivers/ethernet/freescale/dpaa2/switch-drive
 F:	drivers/net/ethernet/freescale/dpaa2/dpaa2-switch*
 F:	drivers/net/ethernet/freescale/dpaa2/dpsw*
 
-DPT_I2O SCSI RAID DRIVER
-M:	Adaptec OEM Raid Solutions <aacraid@microsemi.com>
-L:	linux-scsi@vger.kernel.org
-S:	Maintained
-W:	http://www.adaptec.com/
-F:	drivers/scsi/dpt*
-F:	drivers/scsi/dpt/
-
 DRBD DRIVER
 M:	Philipp Reisner <philipp.reisner@linbit.com>
 M:	Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/scsi/Kconfig

@@ -458,17 +458,6 @@ config SCSI_MVUMI
 	  To compile this driver as a module, choose M here: the
 	  module will be called mvumi.
 
-config SCSI_DPT_I2O
-	tristate "Adaptec I2O RAID support "
-	depends on SCSI && PCI && VIRT_TO_BUS
-	help
-	  This driver supports all of Adaptec's I2O based RAID controllers as 
-	  well as the DPT SmartRaid V cards.  This is an Adaptec maintained
-	  driver by Deanna Bonds.  See <file:Documentation/scsi/dpti.rst>.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called dpt_i2o.
-
 config SCSI_ADVANSYS
 	tristate "AdvanSys SCSI support"
 	depends on SCSI

drivers/scsi/Makefile

@@ -63,7 +63,6 @@ obj-$(CONFIG_BVME6000_SCSI)	+= 53c700.o	bvme6000_scsi.o
 obj-$(CONFIG_SCSI_SIM710)	+= 53c700.o	sim710.o
 obj-$(CONFIG_SCSI_ADVANSYS)	+= advansys.o
 obj-$(CONFIG_SCSI_BUSLOGIC)	+= BusLogic.o
-obj-$(CONFIG_SCSI_DPT_I2O)	+= dpt_i2o.o
 obj-$(CONFIG_SCSI_ARCMSR)	+= arcmsr/
 obj-$(CONFIG_SCSI_AHA152X)	+= aha152x.o
 obj-$(CONFIG_SCSI_AHA1542)	+= aha1542.o

drivers/scsi/dpt/dpti_ioctl.h

-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/***************************************************************************
-                          dpti_ioctl.h  -  description
-                             -------------------
-    begin                : Thu Sep 7 2000
-    copyright            : (C) 2001 by Adaptec
-
-    See Documentation/scsi/dpti.rst for history, notes, license info
-    and credits
- ***************************************************************************/
-
-/***************************************************************************
- *                                                                         *
- *                                                                         *
- ***************************************************************************/
-
-/***************************************************************************
- * This file is generated from  osd_unix.h                                 *
- * *************************************************************************/
-
-#ifndef _dpti_ioctl_h
-#define _dpti_ioctl_h
-
-// IOCTL interface commands
-
-#ifndef _IOWR
-# define _IOWR(x,y,z)	(((x)<<8)|y)
-#endif
-#ifndef _IOW
-# define _IOW(x,y,z)	(((x)<<8)|y)
-#endif
-#ifndef _IOR
-# define _IOR(x,y,z)	(((x)<<8)|y)
-#endif
-#ifndef _IO
-# define _IO(x,y)	(((x)<<8)|y)
-#endif
-/* EATA PassThrough Command	*/
-#define EATAUSRCMD      _IOWR('D',65,EATA_CP)
-/* Set Debug Level If Enabled	*/
-#define DPT_DEBUG       _IOW('D',66,int)
-/* Get Signature Structure	*/
-#define DPT_SIGNATURE   _IOR('D',67,dpt_sig_S)
-#if defined __bsdi__
-#define DPT_SIGNATURE_PACKED   _IOR('D',67,dpt_sig_S_Packed)
-#endif
-/* Get Number Of DPT Adapters	*/
-#define DPT_NUMCTRLS    _IOR('D',68,int)
-/* Get Adapter Info Structure	*/
-#define DPT_CTRLINFO    _IOR('D',69,CtrlInfo)
-/* Get Statistics If Enabled	*/
-#define DPT_STATINFO    _IO('D',70)
-/* Clear Stats If Enabled	*/
-#define DPT_CLRSTAT     _IO('D',71)
-/* Get System Info Structure	*/
-#define DPT_SYSINFO     _IOR('D',72,sysInfo_S)
-/* Set Timeout Value		*/
-#define DPT_TIMEOUT     _IO('D',73)
-/* Get config Data  		*/
-#define DPT_CONFIG      _IO('D',74)
-/* Get Blink LED Code	        */
-#define DPT_BLINKLED    _IOR('D',75,int)
-/* Get Statistical information (if available) */
-#define DPT_STATS_INFO        _IOR('D',80,STATS_DATA)
-/* Clear the statistical information          */
-#define DPT_STATS_CLEAR       _IO('D',81)
-/* Get Performance metrics */
-#define DPT_PERF_INFO        _IOR('D',82,dpt_perf_t)
-/* Send an I2O command */
-#define I2OUSRCMD	_IO('D',76)
-/* Inform driver to re-acquire LCT information */
-#define I2ORESCANCMD	_IO('D',77)
-/* Inform driver to reset adapter */
-#define I2ORESETCMD	_IO('D',78)
-/* See if the target is mounted */
-#define DPT_TARGET_BUSY	_IOR('D',79, TARGET_BUSY_T)
-
-
-  /* Structure Returned From Get Controller Info                             */
-
-typedef struct {
-	uCHAR    state;            /* Operational state               */
-	uCHAR    id;               /* Host adapter SCSI id            */
-	int      vect;             /* Interrupt vector number         */
-	int      base;             /* Base I/O address                */
-	int      njobs;            /* # of jobs sent to HA            */
-	int      qdepth;           /* Controller queue depth.         */
-	int      wakebase;         /* mpx wakeup base index.          */
-	uINT     SGsize;           /* Scatter/Gather list size.       */
-	unsigned heads;            /* heads for drives on cntlr.      */
-	unsigned sectors;          /* sectors for drives on cntlr.    */
-	uCHAR    do_drive32;       /* Flag for Above 16 MB Ability    */
-	uCHAR    BusQuiet;         /* SCSI Bus Quiet Flag             */
-	char     idPAL[4];         /* 4 Bytes Of The ID Pal           */
-	uCHAR    primary;          /* 1 For Primary, 0 For Secondary  */
-	uCHAR    eataVersion;      /* EATA Version                    */
-	uINT     cpLength;         /* EATA Command Packet Length      */
-	uINT     spLength;         /* EATA Status Packet Length       */
-	uCHAR    drqNum;           /* DRQ Index (0,5,6,7)             */
-	uCHAR    flag1;            /* EATA Flags 1 (Byte 9)           */
-	uCHAR    flag2;            /* EATA Flags 2 (Byte 30)          */
-} CtrlInfo;
-
-typedef struct {
-	uSHORT length;		// Remaining length of this
-	uSHORT drvrHBAnum;	// Relative HBA # used by the driver
-	uINT baseAddr;		// Base I/O address
-	uSHORT blinkState;	// Blink LED state (0=Not in blink LED)
-	uCHAR pciBusNum;	// PCI Bus # (Optional)
-	uCHAR pciDeviceNum;	// PCI Device # (Optional)
-	uSHORT hbaFlags;	// Miscellaneous HBA flags
-	uSHORT Interrupt;	// Interrupt set for this device.
-#   if (defined(_DPT_ARC))
-	uINT baseLength;
-	ADAPTER_OBJECT *AdapterObject;
-	LARGE_INTEGER DmaLogicalAddress;
-	PVOID DmaVirtualAddress;
-	LARGE_INTEGER ReplyLogicalAddress;
-	PVOID ReplyVirtualAddress;
-#   else
-	uINT reserved1;		// Reserved for future expansion
-	uINT reserved2;		// Reserved for future expansion
-	uINT reserved3;		// Reserved for future expansion
-#   endif
-} drvrHBAinfo_S;
-
-typedef struct TARGET_BUSY
-{
-  uLONG channel;
-  uLONG id;
-  uLONG lun;
-  uLONG isBusy;
-} TARGET_BUSY_T;
-
-#endif
-

drivers/scsi/dpt/osd_defs.h

-/*	BSDI osd_defs.h,v 1.4 1998/06/03 19:14:58 karels Exp	*/
-/*
- * Copyright (c) 1996-1999 Distributed Processing Technology Corporation
- * All rights reserved.
- *
- * Redistribution and use in source form, with or without modification, are
- * permitted provided that redistributions of source code must retain the
- * above copyright notice, this list of conditions and the following disclaimer.
- *
- * This software is provided `as is' by Distributed Processing Technology and
- * any express or implied warranties, including, but not limited to, the
- * implied warranties of merchantability and fitness for a particular purpose,
- * are disclaimed. In no event shall Distributed Processing Technology be
- * liable for any direct, indirect, incidental, special, exemplary or
- * consequential damages (including, but not limited to, procurement of
- * substitute goods or services; loss of use, data, or profits; or business
- * interruptions) however caused and on any theory of liability, whether in
- * contract, strict liability, or tort (including negligence or otherwise)
- * arising in any way out of the use of this driver software, even if advised
- * of the possibility of such damage.
- *
- */
-
-#ifndef		_OSD_DEFS_H
-#define		_OSD_DEFS_H
-
-/*File - OSD_DEFS.H
- ****************************************************************************
- *
- *Description:
- *
- *	This file contains the OS dependent defines.  This file is included
- *in osd_util.h and provides the OS specific defines for that file.
- *
- *Copyright Distributed Processing Technology, Corp.
- *	  140 Candace Dr.
- *	  Maitland, Fl.	32751   USA
- *	  Phone: (407) 830-5522  Fax: (407) 260-5366
- *	  All Rights Reserved
- *
- *Author:	Doug Anderson
- *Date:		1/31/94
- *
- *Editors:
- *
- *Remarks:
- *
- *
- *****************************************************************************/
-
-
-/*Definitions - Defines & Constants ----------------------------------------- */
-
-  /* Define the operating system */
-#if (defined(__linux__))
-# define _DPT_LINUX
-#elif (defined(__bsdi__))
-# define _DPT_BSDI
-#elif (defined(__FreeBSD__))
-# define _DPT_FREE_BSD
-#else
-# define _DPT_SCO
-#endif
-
-#if defined (ZIL_CURSES)
-#define		_DPT_CURSES
-#else
-#define         _DPT_MOTIF
-#endif
-
-  /* Redefine 'far' to nothing - no far pointer type required in UNIX */
-#define		far
-
-  /* Define the mutually exclusive semaphore type */
-#define		SEMAPHORE_T	unsigned int *
-  /* Define a handle to a DLL */
-#define		DLL_HANDLE_T	unsigned int *
-
-#endif