linux-kernel - Re: [PATCH version 2] [SQUASHME] "FC Pass Thru support" fixed for block/for-2.6.31 tree

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Message-Id: <1242837810.2881.47.camel@localhost.localdomain>
Date:	Wed, 20 May 2009 16:43:30 +0000
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>, Tejun Heo <tj@...nel.org>,
	James Smart <James.Smart@...lex.Com>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	FUJITA Tomonori <tomof@....org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Jens Axboe <Jens.Axboe@...cle.com>
Subject: Re: [PATCH version 2] [SQUASHME] "FC Pass Thru support" fixed for
	block/for-2.6.31 tree

On Wed, 2009-05-20 at 19:39 +0300, Boaz Harrosh wrote:
> On 05/20/2009 07:20 PM, James Bottomley wrote:
> > On Wed, 2009-05-20 at 14:47 +0000, James Bottomley wrote:
> >> OK, so I think your pulling of my posmerge tree can cope with the fact
> >> that I did the necessary rebasing in block for-next before I made it the
> >> base of my combined tree .... think of this as a nice test.
> >>
> >> Just building now ... if it works, I'll push to SCSI post merge and all
> >> our problems should go away.
> > 
> > Unfortunately the combined tree hits a BUG_ON blk-core.c:2045 when doing
> > SPI domain validation.
> > 
> > There will be a short delay ...
> > 
> > James
> > 
> > 
> 
> I have rebased block/for-next onto linus/master which should give us the
> same content?
> 
> But line 2045 is on a code comment.
> 
> if I now do a git-log v2.6.30-rc3..HEAD I have the following patches:
> pick 42dad76 block: simplify I/O stat accounting
> pick af498d7 block: fix the bio_vec array index out-of-bounds test
> pick d616ee5 block: clear req->errors on bio completion only for fs requests
> pick 268ea3d block: merge blk_invoke_request_fn() into __blk_run_queue()
> pick d097b7d block: kill blk_start_queueing()
> pick 3099167 block: don't set REQ_NOMERGE unnecessarily
> pick 4095018 block: cleanup REQ_SOFTBARRIER usages
> pick 17fc349 block: reorder request completion functions
> pick 6e6732a block: reorganize request fetching functions
> pick ca219b4 block: kill blk_end_request_callback()
> pick ea1e706 block: clean up request completion API
> pick 70a8607 block: move rq->start_time initialization to blk_rq_init()
> pick fa6e42b block: implement and use [__]blk_end_request_all()
> pick 861af79 block: kill rq->data
> pick 6abeea3 block: make blk_do_io_stat() do the full "is this rq accountable" checks
> pick 2f94129 block: catch trying to use more bits than request->cmd_flags has
> pick 325f440 block: implement blk_rq_pos/[cur_]sectors() and convert obvious ones
> pick 7168ea4 block: convert to pos and nr_sectors accessors
> pick 209e1e4 block: drop request->hard_* and *nr_sectors
> pick 80d23d0 block: hide request sector and data_len
> pick 563e977 block: implement and enforce request peek/start/fetch
> pick 6cd0982 block: move completion related functions back to blk-core.c
> pick 3978c4e block: set rq->resid_len to blk_rq_bytes() on issue
> pick 01f54fd block: Add blk_make_request(), takes bio, returns a request
> pick 0d58792 block: add warning to blk_make_request()
> 
> How did you resolve the block/for-next and linus/master merge?

I rebased on to the merge base of scsi-misc.

If you actually just ask scsi-post-merge-2.6 where this line is, it will
tell you:

static void blk_finish_request(struct request *req, int error)
{
        BUG_ON(blk_queued_rq(req));
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

        if (blk_rq_tagged(req))
                blk_queue_end_tag(req->q, req);

James


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