[PATCH v2 0/4] rewrites discard support

[Ming Lin]

From: Ming Lin <ming.l at ssi.samsung.com>

This rewrites nvme_setup_discard() with blk_add_request_payload().
And moves it to common code so fabrics driver can also use it.

v2:
 - add helper nvme_map_len()
 - allocates only 16 bytes for discard payload
 - moves command setup to common helper nvme_setup_cmd()
 - returns BLK_MQ_RQ_QUEUE_BUSY when out of memory

Ming Lin (4):
  nvme: add helper nvme_map_len()
  block: add offset in blk_add_request_payload()
  nvme: rewrite discard support
  nvme: add helper nvme_setup_cmd()

 block/blk-core.c         |   5 ++-
 drivers/block/skd_main.c |   2 +-
 drivers/nvme/host/core.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++
 drivers/nvme/host/nvme.h |  55 ++++---------------------
 drivers/nvme/host/pci.c  |  68 +++++++-----------------------
 drivers/scsi/sd.c        |   2 +-
 include/linux/blkdev.h   |   2 +-
 7 files changed, 133 insertions(+), 106 deletions(-)

-- 
1.9.1