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* [SCSI] fix for fc transport recursion problem.James.Smart@Emulex.Com2005-12-151-0/+11
| | | | | | | | | | | | | | | | In the scenario that a link was broken, the devloss timer for each rport was expire at roughly the same time, causing lots of "delete" workqueue items being queued. Depth is dependent upon the number of rports that were on the link. The rport target remove calls were calling flush_scheduled_work(), which would interrupt the stream, and start the next workqueue item, which did the same thing, and so on until recursion depth was large. This fix stops the recursion in the initial delete path, and pushes it off to a host-level work item that reaps the dead rports. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] Consolidate REQ_BLOCK_PC handling path (fix ipod panic)James Bottomley2005-12-131-0/+1
| | | | | | | | This follows on from Jens' patch and consolidates all of the ULD separate handlers for REQ_BLOCK_PC into a single call which has his fix for our direction bug. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] use a completion in scsi_send_eh_cmndChristoph Hellwig2005-11-061-2/+3
| | | | | | | | | | scsi_send_eh_cmnd currently uses a semaphore and an overload of eh_timer to either get a completion for a command for a timeout. Switch to using a completion and wait_for_completion_timeout to simply the code and not having to deal with the races ourselves. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] remove scsi_wait_reqChristoph Hellwig2005-11-061-3/+0
| | | | | | | | This function has been superceeded by the block request based interfaces and is unused (except for the uncompilable cpqfc driver). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* [SCSI] remove Scsi_Host.eh_activeChristoph Hellwig2005-11-061-2/+0
| | | | | | | now that the abuse in qla2xxx is gone this field can be remove. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* Merge by HandJames Bottomley2005-11-047-155/+969
|\ | | | | | | | | | | | | Conflicts in dec_esp.c (Thanks Bacchus), scsi_transport_iscsi.c and scsi_transport_fc.h Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] update fc_transport for removal of block/unblock functionsJames.Smart@Emulex.Com2005-10-281-2/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We recently went back to implement a board reset. When we perform the reset, we wanted to tear down the internal data structures and rebuild them. Unfortunately, when it came to the rport structure, things were odd. If we deleted them, the scsi targets and sdevs would be torn down. Not a good thing for a temporary reset. We could block the rports, but we either maintain the internal structures to keep the rport reference (perhaps even replicating what's in the transport), or we have to fatten the fc transport with new search routines to find the rport (and deal with a case of a dangling rport that the driver forgets). It dawned on me that we had actually reached this state incorrectly. When the fc transport first started, we did the block/unblock first, then added the rport interface. The purpose of block/unblock is to hide the temporary disappearance of the rport (e.g. being deleted, then readded). Why are we making the driver do the block/unblock ? We should be making the transport have only an rport add/delete, and the let the transport handle the block/unblock. So... This patch removes the existing fc_remote_port_block/unblock functions. It moves the block/unblock functionality into the fc_remote_port_add/delete functions. Updates for the lpfc driver are included. Qlogic driver updates are also enclosed, thanks to the contributions of Andrew Vasquez. [Note: the qla2xxx changes are relative to the scsi-misc-2.6 tree as of this morning - which does not include the recent patches sent by Andrew]. The zfcp driver does not use the block/unblock functions. One last comment: The resulting behavior feels very clean. The LLDD is concerned only with add/delete, which corresponds to the physical disappearance. However, the fact that the scsi target and sdevs are not immediately torn down after the LLDD calls delete causes an interesting scenario... the midlayer can call the xxx_slave_alloc and xxx_queuecommand functions with a sdev that is at the location the rport used to be. The driver must validate the device exists when it first enters these functions. In thinking about it, this has always been the case for the LLDD and these routines. The existing drivers already check for existence. However, this highlights that simple validation via data structure dereferencing needs to be watched. To deal with this, a new transport function, fc_remote_port_chkready() was created that LLDDs should call when they first enter these two routines. It validates the rport state, and returns a scsi result which could be returned. In addition to solving the above, it also creates consistent behavior from the LLDD's when the block and deletes are occuring. Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] introduce sfoo_printk, sfoo_id, sfoo_channel helpersJeff Garzik2005-10-281-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | New dev_printk wrappers, which allow us to shrink code, and eliminate direct references to host/channel/id/lun members: scmd_printk() Introduce wrappers for highly common idioms, which may also help us eliminate some ->{channel,id} references in the future: {scmd,sdev}_id() {scmd,sdev}_channel() The scmd_* wrappers are present in scsi/scsi_device.h because they all employ the dereference chain cmd->device->$member. We would prefer to use static inline functions rather than macros, but that would have a Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] kill unused scsi_scan_single_target()Jeff Garzik2005-10-281-2/+0
| | | | | | | | Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] Add an 'Issue LIP' device attribute in fc_transport classAndrew Vasquez2005-10-281-0/+2
| | | | | | | | | | | | | | Ok, here's a patch to add such a common API for fc transport users. Relevant LLD changes (lpfc and qla2xxx) also present. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] sas: add support for PHY resetsChristoph Hellwig2005-10-281-0/+1
| | | | | | | | | | Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] sas: add flag for locally attached PHYsChristoph Hellwig2005-10-281-0/+3
| | | | | | | | | | | | | | | | | | | | | | Add a flag to mark a PHY as attached to the HBA as opposed to beeing on an expander. This is needed because various features are only supported on those. This is a crude hack, the proper fix would be to use different classes for host-attached vs expander phys. I'm looking into that. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] scsi_transport_sas: support link error attributesChristoph Hellwig2005-10-281-4/+19
| | | | | | | | | | | | | | | | | | For now supporting the ->get_linkerrors method is mandatory. I'll probably be beaten to implement the .show_foo variables and different types of attributes soon.. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * [SCSI] move the mid-layer printk's over to shost/starget/sdev_printkJames Bottomley2005-10-282-0/+10
| | | | | | | | | | | | | | | | | | This should eliminate (at least in the mid layer) to make numeric assumptions about any of the enumeration variables. As a side effect, it will also make all the messages consistent and line us up nicely for the error logging strategy (if it ever shows itself again). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * Merge HEAD from ../scsi-misc-2.6-old James Bottomley2005-10-283-147/+889
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| | * [SCSI] iscsi: rename some proto defsMike Christie2005-09-201-13/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | From: hare@suse.de for a proper alignment between open-iscsi and iscsitarget the definitions in include/iscsi_proto.h do not match exactly. With this patch it's possible to have iscsitarget use 'include/iscsi_proto.h' instead of its own iscsi_hdr.h. Signed-off-by: Alex Aizman <itn780@yahoo.com> Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * [SCSI] iscsi: update some iscsi proto defsMike Christie2005-09-201-12/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | From: michaelc@cs.wisc.edu Cleanup some iscsi_proto defs, add some missing values, and fix some defs. Signed-off-by: Alex Aizman <itn780@yahoo.com> Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * Merge HEAD from ../scsi-iscsi-2.6 James Bottomley2005-09-083-147/+866
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| | | * [SCSI] open-iscsi/linux-iscsi-5 Initiator: Header filesAlex Aizman2005-08-063-147/+866
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | open-iscsi-headers.patch - common header files: - iscsi_if.h (user/kernel #defines and user/kernel events); - iscsi_proto.h (RFC3720 #defines and types); - scsi_transport_iscsi.h (transport API, transport #defines and types). Signed-off-by: Alex Aizman <itn780@yahoo.com> Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | | | Merge branch 'srp' of ↵Linus Torvalds2005-11-041-0/+226
|\ \ \ \ | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/roland/infiniband
| * | | | IB: Add SCSI RDMA Protocol (SRP) initiatorRoland Dreier2005-11-021-0/+226
| |/ / / | | | | | | | | | | | | | | | | | | | | | | | | Add an InfiniBand SCSI RDMA Protocol (SRP) initiator. This driver is used to talk talk to InfiniBand SRP targets (storage devices). Signed-off-by: Roland Dreier <rolandd@cisco.com>
* | | | [PATCH] fix missing includesTim Schmielau2005-10-302-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I recently picked up my older work to remove unnecessary #includes of sched.h, starting from a patch by Dave Jones to not include sched.h from module.h. This reduces the number of indirect includes of sched.h by ~300. Another ~400 pointless direct includes can be removed after this disentangling (patch to follow later). However, quite a few indirect includes need to be fixed up for this. In order to feed the patches through -mm with as little disturbance as possible, I've split out the fixes I accumulated up to now (complete for i386 and x86_64, more archs to follow later) and post them before the real patch. This way this large part of the patch is kept simple with only adding #includes, and all hunks are independent of each other. So if any hunk rejects or gets in the way of other patches, just drop it. My scripts will pick it up again in the next round. Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge branch 'master'Jeff Garzik2005-10-282-2/+2
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| * | | [PATCH] gfp_t: drivers/scsiAl Viro2005-10-282-2/+2
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | Merge /spare/repo/linux-2.6/Jeff Garzik2005-10-041-0/+1
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| * | | [SCSI] allow REPORT LUN scanning even for LUN 0 PQ of 3James Bottomley2005-09-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we just ignore the device, which means there are a few arrays out there that we don't find. This patch updates the scsi_report_lun_scan() to take a target instead of a device so it can be called on a return of SCSI_SCAN_TARGET_PRESENT, which is what a PQ 3 device returns. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | | | Merge /spare/repo/linux-2.6/Jeff Garzik2005-09-242-4/+11
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| * | | [SCSI] Fix thread termination for the SCSI error handleJames Bottomley2005-09-191-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | From: Alan Stern <stern@rowland.harvard.edu> This patch (as561) fixes the error handler's thread-exit code. The kthread_stop call won't wake the thread from a down_interruptible, so the patch gets rid of the semaphore and simply does set_current_state(TASK_INTERRUPTIBLE); Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Modified to simplify the termination loop and correct the sleep condition. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] fix oops on usb storage device disconnectJames Bottomley2005-09-191-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We fix the oops by enforcing the host state model. There have also been two extra states added: SHOST_CANCEL_RECOVERY and SHOST_DEL_RECOVERY so we can take the model through host removal while the recovery thread is active. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] change port speed definitions for scsi_transport_fcAndreas Herrmann2005-09-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | obviously FC Port Speeds in scsi_transport_fc.h are defined according to FC-HBA: #define FC_PORTSPEED_1GBIT 1 #define FC_PORTSPEED_2GBIT 2 #define FC_PORTSPEED_10GBIT 4 #define FC_PORTSPEED_4GBIT 8 Problem is, whoever invented FC-HBA did not care about FC-FS or FC-GS-x. Following FC-FS/FC-GS-x defintions of port speeds would look like: 1 GBit: 0x0001 2 GBit: 0x0002 4 GBit: 0x0004 10GBit: 0x0008 (and new in FC-LS: 8 Gbit: 0x0010 16GBit: 0x0020) I really appreciate if scsi_transport_fc.h would define port speeds according to FC-GS-x/FC-FS. Thus mapping of port speed capabilities to values defined in scsi_transport_fc.h can be avoided in the LLDD. Attached is a patch to change the definitions. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | | | Merge /spare/repo/linux-2.6/ Jeff Garzik2005-09-143-2/+110
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| * | | [SCSI] Alter the scsi_add_device() API to conform to what users expectJames Bottomley2005-09-101-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The original API returned either an ERR_PTR() or a refcounted sdev. Unfortunately, if it's successful, you need to do a scsi_device_put() on the sdev otherwise the refcounting is wrong. Everyone seems to expect that scsi_add_device() should be callable without doing the ref put, so alter the API so it is (we still have __scsi_add_device with the original behaviour). The only actual caller that needs altering is the one in firewire ... not because it gets this right, but because it acts on the error if one is returned. Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] fc_transport: Generalize WWN to u64 interger conversions.Andrew Vasquez2005-09-101-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On some platforms the hard-casting of 8 byte node_name and port_name arrays to an u64 would cause unaligned-access warnings. Generalize the conversions with a transport helper function which performs consistent shifting of WWN bytes. Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] SAS transport classChristoph Hellwig2005-09-091-0/+100
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SAS transport class contains common code to deal with SAS HBAs, an aproximated representation of SAS topologies in the driver model, and various sysfs attributes to expose these topologies and managment interfaces to userspace. In addition to the basic SCSI core objects this transport class introduces two additional intermediate objects: The SAS PHY as represented by struct sas_phy defines an "outgoing" PHY on a SAS HBA or Expander, and the SAS remote PHY represented by struct sas_rphy defines an "incoming" PHY on a SAS Expander or end device. Note that this is purely a software concept, the underlying hardware for a PHY and a remote PHY is the exactly the same. There is no concept of a SAS port in this code, users can see what PHYs form a wide port based on the port_identifier attribute, which is the same for all PHYs in a port. This submission doesn't handle hot-plug addition or removal of SAS devices and thus doesn't do scanning in a workqueue yet, that will be added in phase2 after this submission. In a third phase I will add additional managment infrastructure. I think this submission is ready for 2.6.14, but additional comments are of course very welcome. I'd like to thanks James Smart a lot for his very useful input on the design. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | | Merge /spare/repo/linux-2.6/ Jeff Garzik2005-09-087-30/+61
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| * | Merge by hand (conflicts in sd.c)James Bottomley2005-09-062-5/+0
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| | * | [SCSI] unexport scsi_add_timer/scsi_delete_timerChristoph Hellwig2005-09-061-3/+0
| | | | | | | | | | | | | | | | Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] switch EH thread startup to the kthread APIChristoph Hellwig2005-09-061-2/+0
| | | | | | | | | | | | | | | | Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] convert sd to scsi_execute_req (and update the scsi_execute_req API)James Bottomley2005-08-282-9/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This one removes struct scsi_request entirely from sd. In the process, I noticed we have no callers of scsi_wait_req who don't immediately normalise the sense, so I updated the API to make it take a struct scsi_sense_hdr instead of simply a big sense buffer. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] convert SPI transport class to scsi_executeJames Bottomley2005-08-283-4/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This one's slightly more difficult. The transport class uses REQ_FAILFAST, so another interface (scsi_execute) had to be invented to take the extra flag. Also, the sense functions are shifted around to allow spi_execute to place data directly into a struct scsi_sense_hdr. With this change, there's probably a lot of unnecessary sense buffer allocation going on which we can fix later. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | [SCSI] convert the remaining mid-layer pieces to scsi_execute_reqJames Bottomley2005-08-282-17/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | After this, we just have some drivers, all the ULDs and the SPI transport class using scsi_wait_req(). Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | | Merge HEAD from ../scsi-misc-2.6-tmp James Bottomley2005-08-283-7/+31
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| | * | [SCSI] add ability to deny binding to SPI transport classJames Bottomley2005-08-141-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch is necessary if we begin exposing underlying physical disks (which can attach to the SPI transport class) of the hardware RAID cards, since we don't want any SPI parameters binding to the RAID devices. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] add global timeout to the scsi mid-layerJames Bottomley2005-08-081-2/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are certain rogue devices (and the aic7xxx driver) that return BUSY or QUEUE_FULL forever. This code will apply a global timeout (of the total number of retries times the per command timer) to a given command. If it is exceeded, the command is completed regardless of its state. The patch also removes the unused field in the command: timeout and timeout_total. This solves the problem of detecting an endless loop in the mid-layer because of BUSY/QUEUE_FULL bouncing, but will not recover the device. In the aic7xxx case, the driver can be recovered by sending a bus reset, so possibly this should be tied into the error handler? Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] add missing hold_mcs parameter to the spi transport classJames Bottomley2005-08-031-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This parameter is important only to people who take the time to tune the margin control settings, otherwise it's completely irrelevant. However, just in case anyone should want to do this, it's appropriate to include the parameter. I don't do anything with it in DV by design, so the parameter will come up as off by default, so if anyone actually wants to play with the margin control settings they'll have to enable it under the spi_transport class first. I also updated the transfer settings display to report all of the PPR settings instead of only DT, IU and QAS Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] add template for scsi_host_set_state()James Bottomley2005-07-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | Fixes up some warnings in the tree. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] host state model update: mediate host add/remove raceMike Anderson2005-07-301-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support to not allow additions to a host when it is being removed. Signed-off-by: Mike Anderson <andmike@us.ibm.com> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| | * | [SCSI] host state model update: replace old host bitmap stateMike Anderson2005-07-301-5/+9
| | |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Migrate the current SCSI host state model to a model like SCSI device is using. Signed-off-by: Mike Anderson <andmike@us.ibm.com> Rejections fixed up and Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| * | [SCSI] use scatter lists for all block pc requests and simplify hw handlersJames Bottomley2005-08-281-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Original From: Mike Christie <michaelc@cs.wisc.edu> Add scsi_execute_req() as a replacement for scsi_wait_req() Fixed up various pieces (added REQ_SPECIAL and caught req use after free) Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
* | | Merge upstream kernel into libata 'passthru' branchJeff Garzik2005-08-291-0/+8
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