d1985ad1da
I2O subsystem has been broken in mainstream several months ago (after 2.6.18). Commit 4aff5e2333c9a1609662f2091f55c3f6fffdad36 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>
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)