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David Woodhouse 0e9cd2a88d xen: Fix XenStore initialisation for XS_LOCAL 
commit 5f46400f7a6a4fad635d5a79e2aa5a04a30ffea1 upstream.

In commit 3499ba8198ca ("xen: Fix event channel callback via INTX/GSI")
I reworked the triggering of xenbus_probe().

I tried to simplify things by taking out the workqueue based startup
triggered from wake_waiting(); the somewhat poorly named xenbus IRQ
handler.

I missed the fact that in the XS_LOCAL case (Dom0 starting its own
xenstored or xenstore-stubdom, which happens after the kernel is booted
completely), that IRQ-based trigger is still actually needed.

So... put it back, except more cleanly. By just spawning a xenbus_probe
thread which waits on xb_waitq and runs the probe the first time it
gets woken, just as the workqueue-based hack did.

This is actually a nicer approach for *all* the back ends with different
interrupt methods, and we can switch them all over to that without the
complex conditions for when to trigger it. But not in -rc6. This is
the minimal fix for the regression, although it's a step in the right
direction instead of doing a partial revert and actually putting the
workqueue back. It's also simpler than the workqueue.

Fixes: 3499ba8198ca ("xen: Fix event channel callback via INTX/GSI")
Reported-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/4c9af052a6e0f6485d1de43f2c38b1461996db99.camel@infradead.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: Salvatore Bonaccorso <carnil@debian.org>
Cc: Jason Andryuk <jandryuk@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2021-04-12 12:51:44 +08:00
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accessibility
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acpi ACPI: sysfs: Prefer "compatible" modalias 2021-04-12 12:51:42 +08:00
amba
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android binder: add flag to clear buffer on txn complete 2021-03-16 16:43:28 +08:00
ata ata: sata_nv: Fix retrieving of active qcs 2021-03-16 16:39:39 +08:00
atm atm: idt77252: call pci_disable_device() on error path 2021-04-12 12:51:07 +08:00
auxdisplay
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base driver core: Extend device_is_dependent() 2021-04-12 12:51:38 +08:00
bcma
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block nbd: freeze the queue while we're adding connections 2021-04-12 12:51:42 +08:00
bluetooth Bluetooth: revert: hci_h5: close serdev device and free hu in h5_close 2021-04-12 12:51:10 +08:00
bus bus: fsl-mc: fix error return code in fsl_mc_object_allocate() 2021-03-16 16:43:09 +08:00
cdrom
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char virtio: virtio_console: fix DMA memory allocation for rproc serial 2021-03-16 16:40:54 +08:00
clk clk: tegra30: Add hda clock default rates to clock driver 2021-04-12 12:51:34 +08:00
clocksource clocksource/drivers/arm_arch_timer: Correct fault programming of CNTKCTL_EL1.EVNTI 2021-03-16 16:43:03 +08:00
connector
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counter
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cpufreq cpufreq: powernow-k8: pass policy rather than use cpufreq_cpu_get() 2021-04-12 12:51:18 +08:00
cpuidle cpuidle: Fixup IRQ state 2021-03-16 16:35:25 +08:00
crypto chtls: Fix chtls resources release sequence 2021-04-12 12:51:17 +08:00
dax device-dax/core: Fix memory leak when rmmod dax.ko 2021-03-16 16:43:45 +08:00
dca
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devfreq PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out 2021-03-16 16:36:35 +08:00
dio
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dma dmaengine: xilinx_dma: fix mixed_enum_type coverity warning 2021-04-12 12:51:19 +08:00
dma-buf dmabuf: fix use-after-free of dmabuf's file->f_inode 2021-04-12 12:51:14 +08:00
edac EDAC/amd64: Fix PCI component registration 2021-03-16 16:43:29 +08:00
eisa
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extcon extcon: max77693: Fix modalias string 2021-03-16 16:43:12 +08:00
firewire
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firmware efi: EFI_EARLYCON should depend on EFI 2021-03-16 16:41:46 +08:00
fpga fpga: dfl: fix bug in port reset handshake 2021-03-16 16:32:23 +08:00
fsi
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gnss
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gpio gpio: mvebu: fix pwm .get_state period calculation 2021-04-12 12:51:40 +08:00
gpu drm/nouveau/kms/nv50-: fix case where notifier buffer is at offset 0 2021-04-12 12:51:35 +08:00
greybus
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hid HID: wacom: Correct NULL dereference on AES pen proximity 2021-04-12 12:51:41 +08:00
hsi HSI: omap_ssi: Don't jump to free ID in ssi_add_controller() 2021-03-16 16:42:54 +08:00
hv Drivers: hv: vmbus: Allow cleanup of VMBUS_CONNECT_CPU if disconnected 2021-03-16 16:41:31 +08:00
hwmon hwmon: (pwm-fan) Ensure that calculation doesn't discard big period values 2021-04-12 12:51:24 +08:00
hwspinlock
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hwtracing stm class: Fix module init return on allocation failure 2021-04-12 12:51:37 +08:00
i2c i2c: octeon: check correct size of maximum RECV_LEN packet 2021-04-12 12:51:36 +08:00
i3c i3c master: fix missing destroy_workqueue() on error in i3c_master_register 2021-03-16 16:43:55 +08:00
ide scsi: ide: Do not set the RQF_PREEMPT flag for sense requests 2021-04-12 12:51:06 +08:00
idle
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iio iio: ad5504: Fix setting power-down state 2021-04-12 12:51:37 +08:00
infiniband IB/mlx5: Fix error unwinding when set_has_smi_cap fails 2021-04-12 12:51:27 +08:00
input Input: cyapa_gen6 - fix out-of-bounds stack access 2021-03-16 16:43:23 +08:00
interconnect interconnect: qcom: qcs404: Remove GPU and display RPM IDs 2021-03-16 16:42:11 +08:00
iommu iommu/vt-d: Fix unaligned addresses for intel_flush_svm_range_dev() 2021-04-12 12:51:27 +08:00
ipack
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irqchip irqchip/mips-cpu: Set IPI domain parent chip 2021-04-12 12:51:37 +08:00
isdn misdn: dsp: select CONFIG_BITREVERSE 2021-04-12 12:51:24 +08:00
leds leds: bcm6328, bcm6358: use devres LED registering function 2021-03-16 16:39:56 +08:00
lightnvm lightnvm: fix memory leak when submit fails 2021-04-12 12:51:39 +08:00
macintosh macintosh/via-macii: Access autopoll_devs when inside lock 2021-03-16 16:33:39 +08:00
mailbox mailbox: avoid timer start from callback 2021-03-16 16:38:59 +08:00
mcb
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md dm integrity: conditionally disable "recalculate" feature 2021-04-12 12:51:42 +08:00
media media: rc: ensure that uevent can be read directly after rc device register 2021-04-12 12:51:43 +08:00
memory memory: emif: Remove bogus debugfs error handling 2021-03-16 16:39:52 +08:00
memstick memstick: r592: Fix error return in r592_probe() 2021-03-16 16:43:02 +08:00
message scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove() 2021-03-16 16:39:58 +08:00
mfd mfd: sprd: Add wakeup capability for PMIC IRQ 2021-03-16 16:40:48 +08:00
misc habanalabs: Fix memleak in hl_device_reset 2021-04-12 12:51:24 +08:00
mmc mmc: sdhci-xenon: fix 1.8v regulator stabilization 2021-04-12 12:51:33 +08:00
mtd Revert "mtd: spinand: Fix OOB read" 2021-04-12 12:51:04 +08:00
mux
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net net: usb: qmi_wwan: added support for Thales Cinterion PLSx3 modem family 2021-04-12 12:51:43 +08:00
nfc nfc: s3fwrn5: Release the nfc firmware 2021-03-16 16:43:15 +08:00
ntb NTB: hw: amd: fix an issue about leak system resources 2021-03-16 16:39:10 +08:00
nubus
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nvdimm libnvdimm/namespace: Fix reaping of invalidated block-window-namespace labels 2021-03-16 16:43:46 +08:00
nvme nvme-tcp: fix possible data corruption with bio merges 2021-04-12 12:51:26 +08:00
nvmem nvmem: core: fix possibly memleak when use nvmem_cell_info_to_nvmem_cell() 2021-03-16 16:38:43 +08:00
of of/address: Fix of_node memory leak in of_dma_is_coherent 2021-03-16 16:40:51 +08:00
opp opp: Reduce the size of critical section in _opp_table_kref_release() 2021-03-16 16:40:41 +08:00
oprofile
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parisc parisc: mask out enable and reserved bits from sba imask 2021-03-16 16:33:54 +08:00
parport
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pci drivers/pci: Add ecam quirk for Ampere Altra SOC. 2021-03-16 16:43:59 +08:00
pcmcia
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perf drivers/perf: thunderx2_pmu: Fix memory resource error handling 2021-03-16 16:38:23 +08:00
phy phy: renesas: rcar-gen3-usb2: disable runtime pm in case of failure 2021-03-16 16:43:03 +08:00
pinctrl pinctrl: ingenic: Fix JZ4760 support 2021-04-12 12:51:38 +08:00
platform platform/x86: intel-vbtn: Drop HP Stream x360 Convertible PC 11 from allow-list 2021-04-12 12:51:36 +08:00
pnp
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power power: supply: bq24190_charger: fix reference leak 2021-03-16 16:42:55 +08:00
powercap powercap: restrict energy meter to root access 2021-03-16 16:40:32 +08:00
pps
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ps3 powerpc/ps3: use dma_mapping_error() 2021-03-16 16:43:15 +08:00
ptp
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pwm pwm: lp3943: Dynamically allocate PWM chip base 2021-03-16 16:43:18 +08:00
rapidio rapidio: fix the missed put_device() for rio_mport_add_riodev 2021-03-16 16:38:59 +08:00
ras
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regulator regulator: bd718x7: Add enable times 2021-04-12 12:51:24 +08:00
remoteproc remoteproc: qcom: Fix potential NULL dereference in adsp_init_mmio() 2021-03-16 16:43:11 +08:00
reset
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rpmsg rpmsg: glink: Use complete_all for open states 2021-03-16 16:39:50 +08:00
rtc rtc: pl031: fix resource leak in pl031_probe 2021-03-16 16:43:54 +08:00
s390 s390/vfio-ap: No need to disable IRQ after queue reset 2021-04-12 12:51:43 +08:00
sbus
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scsi scsi: megaraid_sas: Fix MEGASAS_IOC_FIRMWARE regression 2021-04-12 12:51:36 +08:00
sfi
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sh
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siox
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slimbus slimbus: qcom-ngd-ctrl: Avoid sending power requests without QMI 2021-03-16 16:42:54 +08:00
soc drivers: soc: atmel: add null entry at the end of at91_soc_allowed_list[] 2021-04-12 12:51:44 +08:00
soundwire soundwire: bus: disable pm_runtime in sdw_slave_delete 2021-03-16 16:36:55 +08:00
spi spi: cadence: cache reference clock rate during probe 2021-04-12 12:51:31 +08:00
spmi
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ssb
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staging exfat: Month timestamp metadata accidentally incremented 2021-04-12 12:51:17 +08:00
target scsi: target: Fix XCOPY NAA identifier lookup 2021-04-12 12:51:14 +08:00
tc
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tee optee: add writeback to valid memory type 2021-03-16 16:41:45 +08:00
thermal thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed 2021-03-16 16:43:48 +08:00
thunderbolt thunderbolt: Fix use-after-free in remove_unplugged_switch() 2021-03-16 16:42:03 +08:00
tty serial: mvebu-uart: fix tx lost characters at power off 2021-04-12 12:51:37 +08:00
uio uio: avoid to request_irq when the legacy irq is not connected 2021-03-16 16:43:58 +08:00
usb xhci: tegra: Delay for disabling LFPS detector 2021-04-12 12:51:38 +08:00
vfio vfio iommu: Add dma available capability 2021-04-12 12:51:15 +08:00
vhost vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-04-12 12:51:09 +08:00
video video: hyperv_fb: Fix the mmap() regression for v5.4.y and older 2021-04-12 12:51:10 +08:00
virt drivers/virt/fsl_hypervisor: Fix error handling path 2021-03-16 16:38:36 +08:00
virtio virtio_ring: Fix two use after free bugs 2021-03-16 16:43:19 +08:00
visorbus
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vlynq
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vme
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w1 w1: mxc_w1: Fix timeout resolution problem leading to bus error 2021-03-16 16:39:58 +08:00
watchdog watchdog: coh901327: add COMMON_CLK dependency 2021-03-16 16:43:17 +08:00
xen xen: Fix XenStore initialisation for XS_LOCAL 2021-04-12 12:51:44 +08:00
zorro
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Kconfig
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Makefile
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