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Ming Lei beb0a21d2c block: don't use bio->bi_vcnt to figure out segment number 
[ Upstream commit 1a67356e9a ]

It is wrong to use bio->bi_vcnt to figure out how many segments
there are in the bio even though CLONED flag isn't set on this bio,
because this bio may be splitted or advanced.

So always use bio_segments() in blk_recount_segments(), and it shouldn't
cause any performance loss now because the physical segment number is figured
out in blk_queue_split() and BIO_SEG_VALID is set meantime since
bdced438ac ("block: setup bi_phys_segments after splitting").

Reviewed-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Fixes: 76d8137a31 ("blk-merge: recaculate segment if it isn't less than max segments")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-01-29 10:24:15 +01:00
..
partitions partitions/aix: fix usage of uninitialized lv_info and lvname structures 2018-09-19 22:47:15 +02:00
Kconfig Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block 2016-10-09 17:29:33 -07:00
Kconfig.iosched blkcg: make CONFIG_BLK_CGROUP bool 2012-03-06 21:27:21 +01:00
Makefile Merge branch 'for-4.9/block-smp' of git://git.kernel.dk/linux-block 2016-10-09 17:32:20 -07:00
badblocks.c badblocks: fix wrong return value in badblocks_set if badblocks are disabled 2017-12-20 10:07:29 +01:00
bio-integrity.c bio-integrity: Do not allocate integrity context for bio w/o data 2018-04-13 19:48:18 +02:00
bio.c block: do not leak memory in bio_copy_user_iov() 2019-04-17 08:36:46 +02:00
blk-cgroup.c block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg 2018-09-19 22:47:11 +02:00
blk-core.c block: blk_init_allocated_queue() set q->fq as NULL in the fail case 2019-08-11 12:22:18 +02:00
blk-exec.c block: Fix spelling in a source code comment 2016-07-20 21:28:22 -06:00
blk-flush.c block: flush: fix IO hang in case of flood fua req 2016-10-26 07:49:27 -06:00
blk-integrity.c block: fix blk_integrity_register to use template's interval_exp if not 0 2017-05-20 14:28:36 +02:00
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: fix infinite loop if the device loses discard capability 2018-12-29 13:40:14 +01:00
blk-map.c block: fix memleak when __blk_rq_map_user_iov() is failed 2020-01-12 11:24:24 +01:00
blk-merge.c block: don't use bio->bi_vcnt to figure out segment number 2020-01-29 10:24:15 +01:00
blk-mq-cpumap.c blk-mq: allow the driver to pass in a queue mapping 2016-09-15 08:42:03 -06:00
blk-mq-pci.c blk-mq-pci: add a fallback when pci_irq_get_affinity returns NULL 2017-08-24 17:12:20 -07:00
blk-mq-sysfs.c blk-mq: make sure that line break can be printed 2019-12-21 10:42:18 +01:00
blk-mq-tag.c blk-mq: Fix tagset reinit in the presence of cpu hot-unplug 2017-12-20 10:07:20 +01:00
blk-mq-tag.h Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block 2016-10-09 17:29:33 -07:00
blk-mq.c block/mq: fix potential deadlock during cpu hotplug 2018-04-24 09:34:18 +02:00
blk-mq.h blk-mq: initialize mq kobjects in blk_mq_init_allocated_queue() 2017-12-14 09:28:21 +01:00
blk-settings.c block: fix an integer overflow in logical block size 2020-01-23 08:19:38 +01:00
blk-softirq.c This adds a new gcc plugin named "latent_entropy". It is designed to 2016-10-15 10:03:15 -07:00
blk-sysfs.c blk-mq: register device instead of disk 2016-09-21 07:56:16 -06:00
blk-tag.c block: support different tag allocation policy 2015-01-23 14:15:46 -07:00
blk-throttle.c blk-throttle: make sure expire time isn't too big 2018-03-22 09:17:44 +01:00
blk-timeout.c block: Fix a race between blk_cleanup_queue() and timeout handling 2017-11-30 08:39:06 +00:00
blk.h blk-mq: remove ->map_queue 2016-09-15 08:42:03 -06:00
bounce.c Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2015-09-19 18:57:09 -07:00
bsg-lib.c Revert "bsg-lib: don't free job in bsg_prepare_job" 2017-10-21 17:21:33 +02:00
bsg.c sg_write()/bsg_write() is not fit to be called under KERNEL_DS 2017-01-09 08:32:25 +01:00
cfq-iosched.c block,blkcg: use __GFP_NOWARN for best-effort allocations in blkcg 2018-09-19 22:47:11 +02:00
cmdline-parser.c block: remove unrelated header files and export symbol 2014-01-21 20:18:26 -08:00
compat_ioctl.c compat_ioctl: block: handle Persistent Reservations 2020-01-12 11:24:13 +01:00
deadline-iosched.c block: do not merge requests without consulting with io scheduler 2016-07-20 21:35:12 -06:00
elevator.c block: Fix secure erase 2016-08-16 09:16:51 -06:00
genhd.c block: fix bdi vs gendisk lifetime mismatch 2016-08-04 14:19:16 -06:00
ioctl.c block: invalidate the page cache when issuing BLKZEROOUT 2016-10-11 15:06:30 -07:00
ioprio.c block: fix use-after-free in sys_ioprio_get() 2016-07-01 08:39:24 -06:00
noop-iosched.c elevator: use list_{first,prev,next}_entry 2015-11-16 15:21:48 -07:00
partition-generic.c block: fix an error code in add_partition() 2018-04-13 19:48:04 +02:00
scsi_ioctl.c block: allow WRITE_SAME commands with the SG_IO ioctl 2017-03-22 12:43:38 +01:00
t10-pi.c block: Consolidate static integrity profile properties 2015-10-21 14:42:38 -06:00