Mike Snitzer bbd848e0fa block: reinstate early return of -EOPNOTSUPP from blkdev_issue_discard ...

Commit 38f2525533 ("block: add __blkdev_issue_discard") incorrectly
disallowed the early return of -EOPNOTSUPP if the device doesn't support
discard (or secure discard).  This early return of -EOPNOTSUPP has
always been part of blkdev_issue_discard() interface so there isn't a
good reason to break that behaviour -- especially when it can be easily
reinstated.

The nuance of allowing early return of -EOPNOTSUPP vs disallowing late
return of -EOPNOTSUPP is: if the overall device never advertised support
for discards and one is issued to the device it is beneficial to inform
the caller that discards are not supported via -EOPNOTSUPP.  But if a
device advertises discard support it means that at least a subset of the
device does have discard support -- but it could be that discards issued
to some regions of a stacked device will not be supported.  In that case
the late return of -EOPNOTSUPP must be disallowed.

Fixes: 38f2525533 ("block: add __blkdev_issue_discard")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

2016-05-05 13:03:26 -06:00

..

partitions

mac: validate mac_partition is within sector

2015-11-20 08:49:28 -07:00

badblocks.c

block, badblocks: introduce devm_init_badblocks

2016-01-09 08:39:04 -08:00

bio-integrity.c

blk-integrity: checking for NULL instead of IS_ERR

2015-12-09 08:04:29 -07:00

bio.c

mm, fs: remove remaining PAGE_CACHE_* and page_cache_{get,release} usage

2016-04-04 10:41:08 -07:00

blk-cgroup.c

block: fix module reference leak on put_disk() call for cgroups throttle

2016-02-09 12:33:35 -07:00

blk-core.c

block: add offset in blk_add_request_payload()

2016-04-12 13:13:23 -06:00

blk-exec.c

block: move PM request support to IDE

2015-05-05 13:40:42 -06:00

blk-flush.c

Revert "blk-flush: Queue through IO scheduler when flush not required"

2015-11-25 11:02:02 -07:00

blk-integrity.c

block, libnvdimm, nvme: provide a built-in blk_integrity nop profile

2015-10-21 14:43:45 -06:00

blk-ioc.c

mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd

2015-11-06 17:50:42 -08:00

blk-lib.c

block: reinstate early return of -EOPNOTSUPP from blkdev_issue_discard

2016-05-05 13:03:26 -06:00

blk-map.c

block: support large requests in blk_rq_map_user_iov

2016-03-03 14:45:02 -07:00

blk-merge.c

block: merge: get the 1st and last bvec via helpers

2016-03-03 14:42:49 -07:00

blk-mq-cpu.c

blk-mq: add file comments and update copyright notices

2014-05-28 10:15:41 -06:00

blk-mq-cpumap.c

blk-mq: Avoid memoryless numa node encoded in hctx numa_node

2015-12-03 09:56:27 -07:00

blk-mq-sysfs.c

blk-mq: Use proper cpumask iterator

2016-03-20 09:34:02 -06:00

blk-mq-tag.c

blk-mq: Export tagset iter function

2016-04-12 13:43:53 -06:00

blk-mq-tag.h

blk-mq: factor out a helper to iterate all tags for a request_queue

2015-10-01 10:10:57 +02:00

blk-mq.c

block: Minor blk_account_io_start usage cleanup

2016-05-03 09:26:58 -06:00

blk-mq.h

blk-mq: dynamic h/w context count

2016-02-09 12:42:17 -07:00

blk-settings.c

block: add ability to flag write back caching on a device

2016-04-12 15:46:27 -06:00

blk-softirq.c

block: fix regression with block enabled tagging

2014-04-09 21:54:06 -06:00

blk-sysfs.c

block: add ability to flag write back caching on a device

2016-04-12 15:46:27 -06:00

blk-tag.c

block: support different tag allocation policy

2015-01-23 14:15:46 -07:00

blk-throttle.c

cgroup: replace cgroup_on_dfl() tests in controllers with cgroup_subsys_on_dfl()

2015-09-18 11:56:28 -04:00

blk-timeout.c

block: remove REQ_NO_TIMEOUT flag

2015-12-22 09:38:34 -07:00

blk.h

block: defer timeouts to a workqueue

2015-12-22 09:38:16 -07:00

bounce.c

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

2015-09-19 18:57:09 -07:00

bsg-lib.c

bsg: Remove unused function bsg_goose_queue()

2012-12-06 14:33:02 +01:00

bsg.c

block: Simplify bsg complete all

2015-02-04 09:57:52 -07:00

cfq-iosched.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

cmdline-parser.c

block: remove unrelated header files and export symbol

2014-01-21 20:18:26 -08:00

compat_ioctl.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

deadline-iosched.c

deadline: remove unused struct member

2016-02-01 09:09:55 -07:00

elevator.c

block: check bio_mergeable() early before merging

2015-10-21 15:00:54 -06:00

genhd.c

Merge branch 'for-4.5/core' of git://git.kernel.dk/linux-block

2016-01-19 15:03:34 -08:00

ioctl.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

ioprio.c

pidns: fix set/getpriority and ioprio_set/get in PRIO_USER mode

2015-11-06 17:50:42 -08:00

Kconfig

block: disable block device DAX by default

2016-02-27 10:28:52 -08:00

Kconfig.iosched

blkcg: make CONFIG_BLK_CGROUP bool

2012-03-06 21:27:21 +01:00

Makefile

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

2016-01-23 18:45:06 -08:00

noop-iosched.c

elevator: use list_{first,prev,next}_entry

2015-11-16 15:21:48 -07:00

partition-generic.c

mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros

2016-04-04 10:41:08 -07:00

scsi_ioctl.c

mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM

2015-11-06 17:50:42 -08:00

t10-pi.c

block: Consolidate static integrity profile properties

2015-10-21 14:42:38 -06:00