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block: call rq_qos_exit() after queue is frozen
Ming Lei authored 
rq_qos_exit() removes the current q->rq_qos, this action has to be
done after queue is frozen, otherwise the IO queue path may never
be waken up, then IO hang is caused.

So fixes this issue by moving rq_qos_exit() after queue is frozen.

Cc: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarMing Lei <ming.lei@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
c57cdf7a
Name Last commit Last update
Documentation Merge tag 'sound-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
LICENSES Merge tag 'docs-4.20' of git://git.lwn.net/linux
arch Merge tag 'pci-v4.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
block block: call rq_qos_exit() after queue is frozen
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()
crypto Revert "net: simplify sock_poll_wait"
drivers mtip32xx: clean an indentation issue, remove extraneous tabs
firmware kbuild: remove all dummy assignments to obj-
fs Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
include block: Introduce blk_revalidate_disk_zones()
init Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
ipc Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
kernel Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
lib Merge tag 'docs-4.20' of git://git.lwn.net/linux
mm Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
net Merge tag 'docs-4.20' of git://git.lwn.net/linux
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
scripts Merge tag 'docs-4.20' of git://git.lwn.net/linux
security Merge branch 'next-general' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
sound Merge tag 'sound-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
tools Merge tag 'pci-v4.20-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/
virt Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
.clang-format clang-format: Set IndentWrappedFunctionNames false
.cocciconfig scripts: add Linux .cocciconfig for coccinelle
.get_maintainer.ignore Add hch to .get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files
.gitignore Merge tag 'kbuild-v4.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
.mailmap Merge tag 'libnvdimm-for-4.19_misc' of gitolite.kernel.org:pub/scm/linux/kernel/git/nvdimm/nvdimm
COPYING COPYING: use the new text with points to the license files
CREDITS 9p: remove Ron Minnich from MAINTAINERS
Kbuild Merge tag 'kbuild-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
MAINTAINERS Merge tag 'sound-4.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Makefile Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
README Drop all 00-INDEX files from Documentation/
README
Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.