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linux/drivers/message/i2o
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Vasily Averin d1985ad1da [PATCH] i2o: block IO errors on i2o disk 
I2O subsystem has been broken in mainstream several months ago (after
2.6.18).  Commit 4aff5e2333 from Jens
Axboe split struct request ->flags into two parts: cmd_type and
cmd_flags.

In i2o layer this patch has replaced flag REQ_SPECIAL by the according
cmd_type.  However i2o has used REQ_SPECIAL not as command type but as
driver-specific flag for the debug purposes.  As result all i2o requests
have type "special" now, are not processed to the hardware and fail with
I/O error:

   i2o/hda:<3>Buffer I/O error on device i2o/hda, logical block 0
  Buffer I/O error on device i2o/hda, logical block 0
  Buffer I/O error on device i2o/hda, logical block 0
   unable to read partition table
  block-osm: device added (TID: 207): i2o/hda

The following patch removes the extra debug checks without any drawbacks and
restores the normal driver's work.

Signed-off-by:	Vasily Averin <vvs@sw.ru>
Acked-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2007-03-27 09:05:16 -07:00
..
Kconfig [PATCH] BLOCK: Make it possible to disable the block layer [try #6] 2006-09-30 20:52:31 +02:00
Makefile [PATCH] I2O: new sysfs attributes and Adaptec specific block device access and 64-bit DMA support 2005-06-24 00:05:28 -07:00
README Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
README.ioctl spelling: s/retreive/retrieve/ 2006-01-10 00:10:13 +01:00
bus-osm.c [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00
config-osm.c [PATCH] I2O: Optimizing 2006-01-06 08:33:54 -08:00
core.h [PATCH] i2o_exec_exit and i2o_driver_exit should not be __exit. 2006-12-13 09:05:47 -08:00
debug.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
device.c [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00
driver.c [PATCH] i2o_exec_exit and i2o_driver_exit should not be __exit. 2006-12-13 09:05:47 -08:00
exec-osm.c [PATCH] fix kernel-doc warnings in 2.6.20-rc1 2006-12-22 08:55:47 -08:00
i2o_block.c [PATCH] i2o: block IO errors on i2o disk 2007-03-27 09:05:16 -07:00
i2o_block.h [PATCH] slab: remove kmem_cache_t 2006-12-07 08:39:25 -08:00
i2o_config.c [PATCH] mark struct file_operations const 5 2007-02-12 09:48:45 -08:00
i2o_lan.h [PATCH] I2O: Lindent run 2006-01-06 08:33:54 -08:00
i2o_proc.c [PATCH] mark struct file_operations const 5 2007-02-12 09:48:45 -08:00
i2o_scsi.c [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00
iop.c Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6 2006-06-29 10:49:17 -07:00
pci.c [PATCH] kernel-doc: fix fusion and i2o docs 2006-12-07 08:39:40 -08:00

README 

	Linux I2O Support	(c) Copyright 1999 Red Hat Software
					and others.

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version
	2 of the License, or (at your option) any later version.

AUTHORS (so far)

Alan Cox, Building Number Three Ltd.
	Core code, SCSI and Block OSMs

Steve Ralston, LSI Logic Corp.
	Debugging SCSI and Block OSM

Deepak Saxena, Intel Corp.
	Various core/block extensions
	/proc interface, bug fixes
	Ioctl interfaces for control
	Debugging LAN OSM

Philip Rumpf
	Fixed assorted dumb SMP locking bugs

Juha Sievanen, University of Helsinki Finland
	LAN OSM code
	/proc interface to LAN class
	Bug fixes
	Core code extensions

Auvo Häkkinen, University of Helsinki Finland
	LAN OSM code
	/Proc interface to LAN class
	Bug fixes
	Core code extensions

Taneli Vähäkangas, University of Helsinki Finland
	Fixes to i2o_config

CREDITS

	This work was made possible by 

Red Hat Software
	Funding for the Building #3 part of the project

Symbios Logic (Now LSI)
	Host adapters, hints, known to work platforms when I hit
	compatibility problems

BoxHill Corporation
	Loan of initial FibreChannel disk array used for development work.

European Comission
	Funding the work done by the University of Helsinki

SysKonnect
        Loan of FDDI and Gigabit Ethernet cards

ASUSTeK
        Loan of I2O motherboard 

STATUS:

o	The core setup works within limits.
o	The scsi layer seems to almost work. 
           I'm still chasing down the hang bug.
o	The block OSM is mostly functional
o	LAN OSM works with FDDI and Ethernet cards.

TO DO:

General:
o	Provide hidden address space if asked
o	Long term message flow control
o	PCI IOP's without interrupts are not supported yet
o	Push FAIL handling into the core
o	DDM control interfaces for module load etc
o       Add I2O 2.0 support (Deffered to 2.5 kernel)

Block:
o	Multiple major numbers
o	Read ahead and cache handling stuff. Talk to Ingo and people
o	Power management
o	Finish Media changers

SCSI:
o	Find the right way to associate drives/luns/busses

Lan:	
o	Performance tuning
o	Test Fibre Channel code

Tape:
o	Anyone seen anything implementing this ?
           (D.S: Will attempt to do so if spare cycles permit)