litmus-rt.git/drivers/cdrom, branch master

block,scsi: fixup blk_get_request dead queue scenarios

2014-08-28T16:03:46+00:00

The blk_get_request function may fail in low-memory conditions or during
device removal (even if __GFP_WAIT is set). To distinguish between these
errors, modify the blk_get_request call stack to return the appropriate
ERR_PTR. Verify that all callers check the return status and consider
IS_ERR instead of a simple NULL pointer check.

For consistency, make a similar change to the blk_mq_alloc_request leg
of blk_get_request.  It may fail if the queue is dead, or the caller was
unwilling to wait.

Signed-off-by: Joe Lawrence 
Acked-by: Jiri Kosina  [for pktdvd]
Acked-by: Boaz Harrosh  [for osd]
Reviewed-by: Jeff Moyer 
Signed-off-by: Jens Axboe

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

2014-06-11T15:41:17+00:00

Pull block layer fixes from Jens Axboe:
 "Final small batch of fixes to be included before -rc1.  Some general
  cleanups in here as well, but some of the blk-mq fixes we need for the
  NVMe conversion and/or scsi-mq.  The pull request contains:

   - Support for not merging across a specified "chunk size", if set by
     the driver.  Some NVMe devices perform poorly for IO that crosses
     such a chunk, so we need to support it generically as part of
     request merging avoid having to do complicated split logic.  From
     me.

   - Bump max tag depth to 10Ki tags.  Some scsi devices have a huge
     shared tag space.  Before we failed with EINVAL if a too large tag
     depth was specified, now we truncate it and pass back the actual
     value.  From me.

   - Various blk-mq rq init fixes from me and others.

   - A fix for enter on a dying queue for blk-mq from Keith.  This is
     needed to prevent oopsing on hot device removal.

   - Fixup for blk-mq timer addition from Ming Lei.

   - Small round of performance fixes for mtip32xx from Sam Bradshaw.

   - Minor stack leak fix from Rickard Strandqvist.

   - Two __init annotations from Fabian Frederick"

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: add __init to blkcg_policy_register
  block: add __init to elv_register
  block: ensure that bio_add_page() always accepts a page for an empty bio
  blk-mq: add timer in blk_mq_start_request
  blk-mq: always initialize request->start_time
  block: blk-exec.c: Cleaning up local variable address returnd
  mtip32xx: minor performance enhancements
  blk-mq: ->timeout should be cleared in blk_mq_rq_ctx_init()
  blk-mq: don't allow queue entering for a dying queue
  blk-mq: bump max tag depth to 10K tags
  block: add blk_rq_set_block_pc()
  block: add notion of a chunk size for request merging

cdrom: convert use of typedef ctl_table to struct ctl_table

2014-06-06T23:08:15+00:00

This typedef is unnecessary and should just be removed.

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

block: add blk_rq_set_block_pc()

2014-06-06T13:57:37+00:00

With the optimizations around not clearing the full request at alloc
time, we are leaving some of the needed init for REQ_TYPE_BLOCK_PC
up to the user allocating the request.

Add a blk_rq_set_block_pc() that sets the command type to
REQ_TYPE_BLOCK_PC, and properly initializes the members associated
with this type of request. Update callers to use this function instead
of manipulating rq->cmd_type directly.

Includes fixes from Christoph Hellwig  for my half-assed
attempt.

Signed-off-by: Jens Axboe

cdrom: Remove unnecessary prototype for cdrom_get_disc_info

2014-05-05T20:58:06+00:00

Move the function to the proper spot instead.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe

cdrom: Remove unnecessary prototype for cdrom_mrw_exit

2014-05-05T20:58:06+00:00

Move the function to appropriate locations instead.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe

cdrom: Remove cdrom_count_tracks prototype

2014-05-05T20:58:06+00:00

Move function to proper location instead.
Fix whitespace and embedded if too.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe

cdrom: Remove cdrom_get_next_writeable prototype

2014-05-05T20:58:06+00:00

Move the function to the right spot instead.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe

cdrom: Remove cdrom_get_last_written prototype

2014-05-05T20:58:06+00:00

Move the function instead.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe

cdrom: Move mmc_ioctls above cdrom_ioctl to remove unnecessary prototype

2014-05-05T20:58:06+00:00

Neaten the spacing too.

Signed-off-by: Joe Perches 
Signed-off-by: Jens Axboe