linux-toradex.git/drivers/block/xsysace.c, branch tegra-10.7.1

const: make block_device_operations const

2009-09-22T14:17:25+00:00

Signed-off-by: Alexey Dobriyan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove multiple KERN_ prefixes from printk formats

2009-07-08T17:30:03+00:00

Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up
handling of log-levels and newlines") changed printk semantics.  printk
lines with multiple KERN_ prefixes are no longer emitted as
before the patch.

 is now included in the output on each additional use.

Remove all uses of multiple KERN_s in formats.

Signed-off-by: Joe Perches 
Signed-off-by: Linus Torvalds

block: Do away with the notion of hardsect_size

2009-05-22T21:22:54+00:00

Until now we have had a 1:1 mapping between storage device physical
block size and the logical block sized used when addressing the device.
With SATA 4KB drives coming out that will no longer be the case.  The
sector size will be 4KB but the logical block size will remain
512-bytes.  Hence we need to distinguish between the physical block size
and the logical ditto.

This patch renames hardsect_size to logical_block_size.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: implement and enforce request peek/start/fetch

2009-05-11T07:52:18+00:00

Till now block layer allowed two separate modes of request execution.
A request is always acquired from the request queue via
elv_next_request().  After that, drivers are free to either dequeue it
or process it without dequeueing.  Dequeue allows elv_next_request()
to return the next request so that multiple requests can be in flight.

Executing requests without dequeueing has its merits mostly in
allowing drivers for simpler devices which can't do sg to deal with
segments only without considering request boundary.  However, the
benefit this brings is dubious and declining while the cost of the API
ambiguity is increasing.  Segment based drivers are usually for very
old or limited devices and as converting to dequeueing model isn't
difficult, it doesn't justify the API overhead it puts on block layer
and its more modern users.

Previous patches converted all block low level drivers to dequeueing
model.  This patch completes the API transition by...

* renaming elv_next_request() to blk_peek_request()

* renaming blkdev_dequeue_request() to blk_start_request()

* adding blk_fetch_request() which is combination of peek and start

* disallowing completion of queued (not started) requests

* applying new API to all LLDs

Renamings are for consistency and to break out of tree code so that
it's apparent that out of tree drivers need updating.

[ Impact: block request issue API cleanup, no functional change ]

Signed-off-by: Tejun Heo 
Cc: Rusty Russell 
Cc: James Bottomley 
Cc: Mike Miller 
Cc: unsik Kim 
Cc: Paul Clements 
Cc: Tim Waugh 
Cc: Geert Uytterhoeven 
Cc: David S. Miller 
Cc: Laurent Vivier 
Cc: Jeff Garzik 
Cc: Jeremy Fitzhardinge 
Cc: Grant Likely 
Cc: Adrian McMenamin 
Cc: Stephen Rothwell 
Cc: Bartlomiej Zolnierkiewicz 
Cc: Borislav Petkov 
Cc: Sergei Shtylyov 
Cc: Alex Dubov 
Cc: Pierre Ossman 
Cc: David Woodhouse 
Cc: Markus Lidel 
Cc: Stefan Weinhuber 
Cc: Martin Schwidefsky 
Cc: Pete Zaitcev 
Cc: FUJITA Tomonori 
Signed-off-by: Jens Axboe

xsysace: dequeue in-flight request

2009-05-11T07:52:15+00:00

xsysace already tracks in-flight request using ace->req.  Converting
to dequeueing model is mostly a matter of adding dequeueing call after
request fetching.  The only tricky part is handling CF removal which
should complete both in flight and on queue requests.  Convert to
dequeueing model.

While at it, remove explicit blk_rq_cur_bytes() and use
__blk_end_request_cur() instead.

[ Impact: dequeue in-flight request ]

Signed-off-by: Tejun Heo 
Cc: Grant Likely 
Signed-off-by: Jens Axboe

block: convert to pos and nr_sectors accessors

2009-05-11T07:50:54+00:00

With recent cleanups, there is no place where low level driver
directly manipulates request fields.  This means that the 'hard'
request fields always equal the !hard fields.  Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.

While at it, drop superflous blk_rq_pos() < 0 test in swim.c.

[ Impact: use pos and nr_sectors accessors ]

Signed-off-by: Tejun Heo 
Acked-by: Geert Uytterhoeven 
Tested-by: Grant Likely 
Acked-by: Grant Likely 
Tested-by: Adrian McMenamin 
Acked-by: Adrian McMenamin 
Acked-by: Mike Miller 
Cc: James Bottomley 
Cc: Bartlomiej Zolnierkiewicz 
Cc: Borislav Petkov 
Cc: Sergei Shtylyov 
Cc: Eric Moore 
Cc: Alan Stern 
Cc: FUJITA Tomonori 
Cc: Pete Zaitcev 
Cc: Stephen Rothwell 
Cc: Paul Clements 
Cc: Tim Waugh 
Cc: Jeff Garzik 
Cc: Jeremy Fitzhardinge 
Cc: Alex Dubov 
Cc: David Woodhouse 
Cc: Martin Schwidefsky 
Cc: Dario Ballabio 
Cc: David S. Miller 
Cc: Rusty Russell 
Cc: unsik Kim 
Cc: Laurent Vivier 
Signed-off-by: Jens Axboe

block: implement blk_rq_pos/[cur_]sectors() and convert obvious ones

2009-05-11T07:50:53+00:00

Implement accessors - blk_rq_pos(), blk_rq_sectors() and
blk_rq_cur_sectors() which return rq->hard_sector, rq->hard_nr_sectors
and rq->hard_cur_sectors respectively and convert direct references of
the said fields to the accessors.

This is in preparation of request data length handling cleanup.

Geert	: suggested adding const to struct request * parameter to accessors
Sergei	: spotted error in patch description

[ Impact: cleanup ]

Signed-off-by: Tejun Heo 
Acked-by: Geert Uytterhoeven 
Acked-by: Stephen Rothwell 
Tested-by: Grant Likely 
Acked-by: Grant Likely 
Ackec-by: Sergei Shtylyov 
Cc: Bartlomiej Zolnierkiewicz 
Cc: Borislav Petkov 
Cc: James Bottomley 
Signed-off-by: Jens Axboe

block: replace end_request() with [__]blk_end_request_cur()

2009-04-28T05:37:36+00:00

end_request() has been kept around for backward compatibility;
however, it's about time for it to go away.

* There aren't too many users left.

* Its use of @updtodate is pretty confusing.

* In some cases, newer code ends up using mixture of end_request() and
  [__]blk_end_request[_all](), which is way too confusing.

So, add [__]blk_end_request_cur() and replace end_request() with it.
Most conversions are straightforward.  Noteworthy ones are...

* paride/pcd: next_request() updated to take 0/-errno instead of 1/0.

* paride/pf: pf_end_request() and next_request() updated to take
  0/-errno instead of 1/0.

* xd: xd_readwrite() updated to return 0/-errno instead of 1/0.

* mtd/mtd_blkdevs: blktrans_discard_request() updated to return
  0/-errno instead of 1/0.  Unnecessary local variable res
  initialization removed from mtd_blktrans_thread().

[ Impact: cleanup ]

Signed-off-by: Tejun Heo 
Acked-by: Joerg Dorchain 
Acked-by: Geert Uytterhoeven 
Acked-by: Grant Likely 
Acked-by: Laurent Vivier 
Cc: Tim Waugh 
Cc: Stephen Rothwell 
Cc: Paul Mackerras 
Cc: Jeremy Fitzhardinge 
Cc: Markus Lidel 
Cc: David Woodhouse 
Cc: Pete Zaitcev 
Cc: unsik Kim

xsysace: Fix dereferencing of cf_id after hd_driveid removal

2009-04-08T12:13:04+00:00

Commit 4aaf2fec718f6fbf38668edf733a0ab09a49cab1 (xsysace: make it
'struct hd_driveid'-free) converted the cf_id member of 'struct
ace_device' from a 'struct hd_driveid' to a u16 array.  However,
references to the base of the structure were still using the '&'
operator.  When the address was used with the ata_id_u32() macro, the
compiler used the size of the entire array instead of sizeof(u16) to
calculate the offset from the base address.

This patch removes the use of the '&' operator from all references of
cf_id to fix the bug and remove future confusion.

Signed-off-by: Grant Likely 
Signed-off-by: Bartlomiej Zolnierkiewicz

xsysace: make it 'struct hd_driveid'-free

2009-04-01T19:42:22+00:00

* Change cf_id field in struct ace_device from 'struct hd_driveid *id'
  to 'u16 *id' and update driver accordingly.

* Include  directly instead of through .

While at it:

* Use ata_id_u32() macro.

There should be no functional changes caused by this patch.

Cc: Grant Likely 
Signed-off-by: Bartlomiej Zolnierkiewicz