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SeongJae Park 31dc3b1562 xen-blkfront: Apply 'feature_persistent' parameter when connect 
commit 402c43ea6b upstream.

In some use cases[1], the backend is created while the frontend doesn't
support the persistent grants feature, but later the frontend can be
changed to support the feature and reconnect.  In the past, 'blkback'
enabled the persistent grants feature since it unconditionally checked
if frontend supports the persistent grants feature for every connect
('connect_ring()') and decided whether it should use persistent grans or
not.

However, commit aac8a70db2 ("xen-blkback: add a parameter for
disabling of persistent grants") has mistakenly changed the behavior.
It made the frontend feature support check to not be repeated once it
shown the 'feature_persistent' as 'false', or the frontend doesn't
support persistent grants.

Similar behavioral change has made on 'blkfront' by commit 74a852479c
("xen-blkfront: add a parameter for disabling of persistent grants").
This commit changes the behavior of the parameter to make effect for
every connect, so that the previous behavior of 'blkfront' can be
restored.

[1] https://lore.kernel.org/xen-devel/CAJwUmVB6H3iTs-C+U=v-pwJB7-_ZRHPxHzKRJZ22xEPW7z8a=g@mail.gmail.com/

Fixes: 74a852479c ("xen-blkfront: add a parameter for disabling of persistent grants")
Cc: <stable@vger.kernel.org> # 5.10.x
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Maximilian Heyne <mheyne@amazon.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220715225108.193398-4-sj@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2022-08-17 14:42:33 +02:00
..
ABI xen-blkfront: Apply 'feature_persistent' parameter when connect 2022-08-17 14:42:33 +02:00
PCI PCI/doc: cleanup references to the legacy PCI DMA API 2022-03-30 16:54:24 +02:00
RCU Merge branches 'doc.2021.11.30c', 'exp.2021.12.07a', 'fastnohz.2021.11.30c', 'fixes.2021.11.30c', 'nocb.2021.12.09a', 'nolibc.2021.11.30c', 'tasks.2021.12.09a', 'torture.2021.12.07a' and 'torturescript.2021.11.30c' into HEAD 2021-12-09 11:38:09 -08:00
accounting sched/psi: report zeroes for CPU full at the system level 2022-06-09 10:30:00 +02:00
admin-guide x86/bugs: Enable STIBP for IBPB mitigated RETBleed 2022-08-17 14:42:19 +02:00
arc docs: ARC: Improve readability 2021-12-10 14:28:01 -07:00
arm Documentation: arm: marvell: Extend Avanta list 2022-01-27 11:22:34 -07:00
arm64 arm64: errata: Remove AES hwcap for COMPAT tasks 2022-08-17 14:40:21 +02:00
block block: remove biodoc.rst 2022-02-15 07:47:52 -07:00
bpf docs: netdev: move the netdev-FAQ to the process pages 2022-03-31 10:49:39 +02:00
cdrom Documentation: Fix links for udftools project and pktcdvd tool 2022-02-15 16:15:33 -07:00
core-api XArray update for 5.18: 2022-04-01 13:40:44 -07:00
cpu-freq cpufreq: Reintroduce ready() callback 2022-02-09 13:18:49 +05:30
crypto crypto: engine - Add KPP Support to Crypto Engine 2021-10-29 21:04:03 +08:00
dev-tools Documentation: kunit: fix path to .kunitconfig in start.rst 2022-04-04 12:02:44 -06:00
devicetree dt-bindings: riscv: fix SiFive l2-cache's cache-sets 2022-08-17 14:40:10 +02:00
doc-guide docs: discourage use of list tables 2022-01-07 09:33:13 -07:00
driver-api firmware: sysfb: Add sysfb_disable() helper function 2022-07-22 10:21:48 +02:00
fault-injection Char / Misc driver changes for 5.15-rc1 2021-09-01 08:35:06 -07:00
fb Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
features nds32: Remove the architecture 2022-03-07 13:54:59 +01:00
filesystems netfs: do not unlock and put the folio twice 2022-07-22 10:21:42 +02:00
firmware-guide Merge branch 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2022-03-26 12:46:08 -07:00
firmware_class firmware: revamp firmware documentation 2017-01-11 09:42:59 +01:00
fpga fpga: fix spelling mistakes 2021-07-21 19:54:21 -07:00
gpu pci-v5.18-changes 2022-03-25 13:02:05 -07:00
hid Documentation: Add leading slash to some paths 2021-03-31 13:49:19 -06:00
hwmon Char/Misc and other driver updates for 5.18-rc1 2022-03-28 12:27:35 -07:00
i2c i2c: i801: Add support for Intel Raptor Lake PCH-S 2022-02-15 10:03:40 +01:00
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
ide docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
iio iio: hrtimer: Allow sub Hz granularity 2021-03-25 19:13:49 +00:00
infiniband RDMA/core: Remove FMR device ops 2020-06-02 20:32:54 -03:00
input Input: docs: add more details on the use of BTN_TOOL 2022-03-01 15:46:03 +01:00
isdn isdn: capi: dead code removal 2019-12-11 09:12:38 +01:00
kbuild kbuild: Make $(LLVM) more flexible 2022-03-31 12:03:46 +09:00
kernel-hacking docs: fix typo in Documentation/kernel-hacking/locking.rst 2022-01-27 11:22:33 -07:00
leds leds: add new LED_FUNCTION_PLAYER for player LEDs for game controllers. 2021-10-27 09:49:29 +02:00
litmus-tests Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test 2020-06-29 12:05:18 -07:00
livepatch Documentation: livepatch: Add livepatch API page 2021-12-23 11:35:53 +01:00
locking Documentation: Fix duplicate statement about raw_spinlock_t type 2022-03-25 13:30:08 -06:00
m68k docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
maintainer Some late-arriving documentation improvements. This is mostly build-system 2022-03-31 12:10:42 -07:00
mhi
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mips docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
misc-devices dw-xdata-pcie: Update outdated info and improve text format 2021-04-14 19:47:28 +02:00
netlabel docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
networking Documentation: fix sctp_wmem in ip-sysctl.rst 2022-08-03 12:05:24 +02:00
nios2 docs: nios2: add missing ReST file 2020-12-07 08:35:21 -07:00
nvdimm nvdimm: fixes to maintainter-entry-profile 2020-05-25 10:19:19 -06:00
openrisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
parisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
pcmcia docs: add some directories to the main documentation index 2019-07-15 11:03:03 -03:00
peci
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power Documentation: EM: Describe new registration method using DT 2022-03-03 09:35:04 +05:30
powerpc powerpc/doc: Fix htmldocs errors 2021-08-27 00:56:34 +10:00
process docs: submitting-patches: Fix crossref to 'The canonical patch format' 2022-06-06 08:48:59 +02:00
riscv Documentation: riscv: remove non-existent directory from table of contents 2022-03-31 16:18:56 -07:00
s390 vfio/mdev: Remove CONFIG_VFIO_MDEV_DEVICE 2021-06-21 15:29:25 -06:00
scheduler Changes in this cycle were: 2022-03-22 14:39:12 -07:00
scsi scsi: ufs: docs: UFS documentation corrections 2022-03-08 22:49:49 -05:00
security Documentation: siphash: disambiguate HalfSipHash algorithm from hsiphash functions 2022-04-25 17:26:40 +02:00
sh docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sound ALSA: usb-audio: Add quirk bits for enabling/disabling generic implicit fb 2022-06-09 10:29:49 +02:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx docs: sphinx/requirements: Limit jinja2<3.1 2022-03-30 13:44:54 -06:00
sphinx-static docs: add support for RTD dark mode 2021-12-10 14:05:55 -07:00
spi
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staging remoteproc: Change rproc_shutdown() to return a status 2022-03-11 14:31:55 -06:00
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers rcu: Remove the RCU_FAST_NO_HZ Kconfig option 2021-11-30 17:24:47 -08:00
tools rtla/Makefile: Properly handle dependencies 2022-06-14 18:45:03 +02:00
trace Updates to Tracing: 2022-04-03 12:26:01 -07:00
translations Kbuild -std=gnu11 updates for v5.18 2022-03-25 11:48:01 -07:00
tty serial: 8250: Add proper clock handling for OxSemi PCIe devices 2022-08-17 14:42:23 +02:00
usb usb: gadget: f_uac2: Optionally determine bInterval for HS and SS 2022-01-31 14:26:18 +01:00
userspace-api media: uapi: HEVC: Change pic_order_cnt definition in v4l2_hevc_dpb_entry 2022-08-17 14:41:06 +02:00
virt KVM: fix bad user ABI for KVM_EXIT_SYSTEM_EVENT 2022-04-29 12:38:22 -04:00
vm mm/memory-failure: disable unpoison once hw error happens 2022-06-29 09:04:41 +02:00
w1 dt-bindings: w1: update w1-gpio.yaml reference 2021-09-16 21:02:09 -05:00
watchdog docs: watchdog: fix obsolete include file reference in pcwd 2021-03-06 17:36:51 -07:00
x86 - More noinstr fixes 2022-03-25 12:34:53 -07:00
xtensa A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
.gitignore
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Makefile docs: Makefile: Add -no-shell-escape option to LATEXOPTS 2022-02-14 12:50:17 -07:00
SubmittingPatches
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arch.rst
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asm-annotations.rst linkage: remove SYM_FUNC_{START,END}_ALIAS() 2022-02-22 16:21:34 +00:00
atomic_bitops.txt
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atomic_t.txt
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conf.py docs/conf.py: Cope with removal of language=None in Sphinx 5.0.0 2022-06-09 10:30:54 +02:00
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memory-barriers.txt
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