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  1. 28 4月, 2009 11 次提交
    • T
      ide-floppy: block pc always uses bio · 8968932e
      由 Tejun Heo 提交于 
      Impact: remove unnecessary code path

Block pc requests always use bio and rq->data is always NULL.  No need
to worry about !rq->bio cases in idefloppy_block_pc_cmd().  Note that
ide-atapi uses ide_pio_bytes() for bio PIO transfer which handle sg
fine.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
      8968932e
    • T
      ide-cd: clear sense buffer before issuing request sense · 59a4f6f3
      由 Tejun Heo 提交于 
      Impact: code simplification

ide_cd_request_sense_fixup() clears the tail of the sense buffer if
the device didn't completely fill it.  This patch makes
cdrom_queue_request_sense() clear the sense buffer before issuing the
command instead of clearing it afterwards.  This simplifies code and
eases future changes.
Signed-off-by: NTejun Heo <tj@kernel.org>
      59a4f6f3
    • T
      ide kill unused ide_cmd->special · 214ae191
      由 Tejun Heo 提交于 
      Impact: removal of unused field

No one uses ide_cmd->special anymore.  Kill it.
Signed-off-by: NTejun Heo <tj@kernel.org>
      214ae191
    • T
      ide: don't set REQ_SOFTBARRIER · b2963ac1
      由 Tejun Heo 提交于 
      ide doesn't have to worry about REQ_SOFTBARRIER.  Don't set it.
Signed-off-by: NTejun Heo <tj@kernel.org>
      b2963ac1
    • T
      ide: use blk_run_queue() instead of blk_start_queueing() · 220d06b5
      由 Tejun Heo 提交于 
      blk_start_queueing() is being phased out in favor of
[__]blk_run_queue().  Switch.
Signed-off-by: NTejun Heo <tj@kernel.org>
      220d06b5
    • T
      ide-tape: remove back-to-back REQUEST_SENSE detection · 0de57fb9
      由 Tejun Heo 提交于 
      Impact: fix an oops which always triggers

ide_tape_issue_pc() assumed drive->pc isn't NULL on invocation when
checking for back-to-back request sense issues but drive->pc can be
NULL and even when it's not NULL, it's not safe to dereference it once
the previous command is complete because pc could have been freed or
was on stack.  Kill back-to-back REQUEST_SENSE detection.
Signed-off-by: NTejun Heo <tj@kernel.org>
      0de57fb9
    • T
      block: clear req->errors on bio completion only for fs requests · 924cec77
      由 Tejun Heo 提交于 
      Impact: subtle behavior change

For fs requests, rq is only carrier of bios and rq error status as a
whole doesn't mean much.  This is the reason why rq->errors is being
cleared on each partial completion of a request as on each partial
completion the error status is transferred to the respective bios.

For pc requests, rq->errors is used to carry error status to the
issuer and thus __end_that_request_first() doesn't clear it on such
cases.

The condition was fine till now as only fs and pc requests have used
bio and thus the bio completion path.  However, future changes will
unify data accesses to bio and all non fs users care about rq error
status.  Clear rq->errors on bio completion only for fs requests.

In general, the implicit clearing is a bit too subtle especially as
the meaning of rq->errors is completely dependent on low level
drivers.  Unifying / cleaning up rq->errors usage and letting llds
manage it would be better.  TODO comment added.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NJens Axboe <axboe@kernel.dk>
      924cec77
    • A
      loop: use BIO list management functions · e686307f
      由 Akinobu Mita 提交于 
      Now that the bio list management stuff is generic, convert loop to use
bio lists instead of its own private bio list implementation.

Cc:  Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
      e686307f
    • T
      hd: fix locking · e93b9fb7
      由 Tejun Heo 提交于 
      hd dance around local irq and HD_IRQ enable without achieving much.
It ends up transferring data from irq handler with both local irq and
HD_IRQ disabled.  The only place it actually does something is while
transferring the first block of a request which it does with HD_IRQ
disabled but local irq enabled.

Unfortunately, the dancing is horribly broken from locking POV.  IRQ
and timeout handlers access block queue without grabbing the queue
lock and running the driver in SMP configuration crashes the whole
machine pretty quickly.

Remove meaningless irq enable/disable dancing and add proper locking
in issue, irq and timeout paths.
Signed-off-by: NTejun Heo <tj@kernel.org>
      e93b9fb7
    • B
      mg_disk: fix CONFIG_LBD=y warning · 7090a0a9
      由 Bartlomiej Zolnierkiewicz 提交于 
      drivers/block/mg_disk.c: In function ‘mg_dump_status’:
drivers/block/mg_disk.c:265: warning: format ‘%ld’ expects type ‘long int’, but
argument 2 has type ‘sector_t’

[ Impact: kill build warning ]

Cc: unsik Kim <donari75@gmail.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
      7090a0a9
    • T
      mg_disk: fix locking · ac2ff946
      由 Tejun Heo 提交于 
      IRQ and timeout handlers call functions which expect locked queue lock
without locking it.  Fix it.

While at it, convert 0s used as null pointer constant to NULLs.

[ Impact: fix locking, cleanup ]
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: unsik Kim <donari75@gmail.com>
      ac2ff946
  3. 27 4月, 2009 11 次提交
  5. 25 4月, 2009 6 次提交
  7. 24 4月, 2009 12 次提交