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Maciej S. Szmigiero fc8ebd01de block, bfq: return nbytes and not zero from struct cftype .write() method 
The value that struct cftype .write() method returns is then directly
returned to userspace as the value returned by write() syscall, so it
should be the number of bytes actually written (or consumed) and not zero.

Returning zero from write() syscall makes programs like /bin/echo or bash
spin.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Fixes: e21b7a0b9887 ("block, bfq: add full hierarchical scheduling and cgroups support")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-08-16 13:11:16 -06:00
..
partitions
partitions/aix: append null character to print data from disk
2018-07-27 09:17:41 -06:00
badblocks.c
badblocks: fix wrong return value in badblocks_set if badblocks are disabled
2017-11-03 11:29:50 -07:00
bfq-cgroup.c
block, bfq: return nbytes and not zero from struct cftype .write() method
2018-08-16 13:11:16 -06:00
bfq-iosched.c
block, bfq: reduce write overcharge
2018-08-16 13:08:13 -06:00
bfq-iosched.h
block, bfq: add/remove entity weights correctly
2018-07-09 09:07:52 -06:00
bfq-wf2q.c
block, bfq: improve code of bfq_bfqq_charge_time
2018-08-16 13:08:15 -06:00
bio-integrity.c
block: move bio_integrity_{intervals,bytes} into blkdev.h
2018-07-26 15:49:41 -06:00
bio.c
block: bvec_nr_vecs() returns value for wrong slab
2018-08-09 08:25:04 -06:00
blk-cgroup.c
blk-cgroup: hold the queue ref during throttling
2018-08-01 09:16:03 -06:00
blk-core.c
block: don't warn for flush on read-only device
2018-08-14 10:52:40 -06:00
blk-exec.c
blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request
2018-01-17 09:49:21 -07:00
blk-flush.c
block: fix use-after-free in block flush handling
2018-06-09 06:37:14 -06:00
blk-integrity.c
block drivers/block: Use octal not symbolic permissions
2018-05-24 13:38:59 -06:00
blk-ioc.c
block, mm: remove unnecessary __GFP_HIGH flag
2018-07-09 09:07:54 -06:00
blk-iolatency.c
block: make iolatency avg_lat exponentially decay
2018-08-02 09:58:14 -06:00
blk-lib.c
block: fix infinite loop if the device loses discard capability
2018-07-09 09:07:54 -06:00
blk-map.c
Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block
2018-01-29 11:51:49 -08:00
blk-merge.c
block: don't use blocking queue entered for recursive bio submits
2018-06-02 20:35:00 -06:00
blk-mq-cpumap.c
blk-mq: don't keep offline CPUs mapped to hctx 0
2018-04-10 08:38:46 -06:00
blk-mq-debugfs-zoned.c
block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n
2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c
blk-mq: dequeue request one by one from sw queue if hctx is busy
2018-07-09 09:07:53 -06:00
blk-mq-debugfs.h
block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n
2018-07-09 09:07:52 -06:00
blk-mq-pci.c
blk-mq: code clean-up by adding an API to clear set->mq_map
2018-07-09 09:07:53 -06:00
blk-mq-rdma.c
block: Add rdma affinity based queue mapping helper
2017-08-08 14:58:03 -04:00
blk-mq-sched.c
blk-mq: issue directly if hw queue isn't busy in case of 'none'
2018-07-17 16:04:00 -06:00
blk-mq-sched.h
block: move sysfs_lock into elevator_init
2018-06-01 07:38:19 -06:00
blk-mq-sysfs.c
block drivers/block: Use octal not symbolic permissions
2018-05-24 13:38:59 -06:00
blk-mq-tag.c
blk-mq: count the hctx as active before allocating tag
2018-08-09 08:34:17 -06:00
blk-mq-tag.h
Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block
2017-11-14 15:32:19 -08:00
blk-mq-virtio.c
…
blk-mq.c
blk-mq: count the hctx as active before allocating tag
2018-08-09 08:34:17 -06:00
blk-mq.h
blk-mq: issue directly if hw queue isn't busy in case of 'none'
2018-07-17 16:04:00 -06:00
blk-rq-qos.c
blk-rq-qos: make depth comparisons unsigned
2018-07-22 11:30:53 -06:00
blk-rq-qos.h
blk-rq-qos: make depth comparisons unsigned
2018-07-22 11:30:53 -06:00
blk-settings.c
block: allow max_discard_segments to be stacked
2018-07-24 14:46:39 -06:00
blk-softirq.c
block: fix timeout changes for legacy request drivers
2018-06-19 11:27:18 -06:00
blk-stat.c
blk-stat: export helpers for modifying blk_rq_stat
2018-07-09 09:07:54 -06:00
blk-stat.h
blk-stat: export helpers for modifying blk_rq_stat
2018-07-09 09:07:54 -06:00
blk-sysfs.c
blkcg: Make blkg_root_lookup() work for queues in bypass mode
2018-08-11 15:41:25 -06:00
blk-tag.c
for-linus-20180616
2018-06-17 05:37:55 +09:00
blk-throttle.c
Blk-throttle: reduce tail io latency when iops limit is enforced
2018-08-09 12:43:16 -06:00
blk-timeout.c
blk-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE
2018-06-23 10:25:45 -06:00
blk-wbt.c
blk-wbt: fix IO hang in wbt_wait()
2018-08-14 11:05:52 -06:00
blk-wbt.h
block: remove external dependency on wbt_flags
2018-07-09 09:07:54 -06:00
blk-zoned.c
block: Remove a superfluous cast from blkdev_report_zones()
2018-07-09 09:07:52 -06:00
blk.h
block: Introduce blk_exit_queue()
2018-08-09 09:12:59 -06:00
bounce.c
block: unexport bio_clone_bioset
2018-07-24 14:43:26 -06:00
bsg-lib.c
block/bsg-lib: use PTR_ERR_OR_ZERO to simplify the flow path
2018-08-01 09:13:03 -06:00
bsg.c
Linux 4.18-rc6
2018-08-05 19:32:09 -06:00
cfq-iosched.c
cfq: Suppress compiler warnings about comparisons
2018-08-07 17:57:13 -06:00
cmdline-parser.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat_ioctl.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
deadline-iosched.c
block drivers/block: Use octal not symbolic permissions
2018-05-24 13:38:59 -06:00
elevator.c
block: split the blk-mq case from elevator_init
2018-06-01 07:38:21 -06:00
genhd.c
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
ioctl.c
block: pass inclusive 'lend' parameter to truncate_inode_pages_range
2018-02-23 15:20:19 -07:00
ioprio.c
block: add ioprio_check_cap function
2018-05-31 10:50:54 -04:00
Kconfig
block: introduce blk-iolatency io controller
2018-07-09 09:07:54 -06:00
Kconfig.iosched
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kyber-iosched.c
block: kyber: make kyber more friendly with merging
2018-05-30 10:47:40 -06:00
Makefile
block: introduce blk-iolatency io controller
2018-07-09 09:07:54 -06:00
mq-deadline.c
block drivers/block: Use octal not symbolic permissions
2018-05-24 13:38:59 -06:00
noop-iosched.c
…
opal_proto.h
block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled
2017-09-11 09:45:52 -06:00
partition-generic.c
block: Track DISCARD statistics and output them in stat and diskstat
2018-07-18 08:44:22 -06:00
scsi_ioctl.c
block: consistently use GFP_NOIO instead of __GFP_NORECLAIM
2018-05-14 08:55:18 -06:00
sed-opal.c
block: sed-opal: Fix a couple off by one bugs
2018-06-20 12:04:06 -06:00
t10-pi.c
block: move dif_prepare/dif_complete functions to block layer
2018-07-30 08:27:02 -06:00