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David Woodhouse a09d4e7acd xen: Fix event channel callback via INTX/GSI 
[ Upstream commit 3499ba8198 ]

For a while, event channel notification via the PCI platform device
has been broken, because we attempt to communicate with xenstore before
we even have notifications working, with the xs_reset_watches() call
in xs_init().

We tend to get away with this on Xen versions below 4.0 because we avoid
calling xs_reset_watches() anyway, because xenstore might not cope with
reading a non-existent key. And newer Xen *does* have the vector
callback support, so we rarely fall back to INTX/GSI delivery.

To fix it, clean up a bit of the mess of xs_init() and xenbus_probe()
startup. Call xs_init() directly from xenbus_init() only in the !XS_HVM
case, deferring it to be called from xenbus_probe() in the XS_HVM case
instead.

Then fix up the invocation of xenbus_probe() to happen either from its
device_initcall if the callback is available early enough, or when the
callback is finally set up. This means that the hack of calling
xenbus_probe() from a workqueue after the first interrupt, or directly
from the PCI platform device setup, is no longer needed.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210113132606.422794-2-dwmw2@infradead.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2021-01-27 11:47:44 +01:00
..
accessibility
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acpi ACPI: scan: Make acpi_bus_get_device() clear return pointer on error 2021-01-27 11:47:40 +01:00
amba
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android binder: add flag to clear buffer on txn complete 2020-12-30 11:51:35 +01:00
ata ata: sata_nv: Fix retrieving of active qcs 2020-11-05 11:43:12 +01:00
atm atm: idt77252: call pci_disable_device() on error path 2021-01-12 20:16:11 +01:00
auxdisplay
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base regmap: debugfs: Fix a reversed if statement in regmap_debugfs_init() 2021-01-17 14:05:38 +01:00
bcma
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block block: rsxx: select CONFIG_CRC32 2021-01-17 14:05:36 +01:00
bluetooth Bluetooth: revert: hci_h5: close serdev device and free hu in h5_close 2021-01-12 20:16:17 +01:00
bus bus: fsl-mc: fix error return code in fsl_mc_object_allocate() 2020-12-30 11:51:23 +01:00
cdrom
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char virtio: virtio_console: fix DMA memory allocation for rproc serial 2020-11-18 19:20:29 +01:00
clk clk: tegra30: Add hda clock default rates to clock driver 2021-01-27 11:47:44 +01:00
clocksource clocksource/drivers/arm_arch_timer: Correct fault programming of CNTKCTL_EL1.EVNTI 2020-12-30 11:51:19 +01:00
connector
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counter
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cpufreq cpufreq: powernow-k8: pass policy rather than use cpufreq_cpu_get() 2021-01-17 14:05:35 +01:00
cpuidle cpuidle: Fixup IRQ state 2020-09-09 19:12:21 +02:00
crypto chtls: Fix chtls resources release sequence 2021-01-17 14:05:34 +01:00
dax device-dax/core: Fix memory leak when rmmod dax.ko 2020-12-30 11:51:46 +01:00
dca
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devfreq PM / devfreq: tegra30: Fix integer overflow on CPU's freq max out 2020-10-01 13:17:14 +02:00
dio
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dma dmaengine: xilinx_dma: fix mixed_enum_type coverity warning 2021-01-17 14:05:36 +01:00
dma-buf dmabuf: fix use-after-free of dmabuf's file->f_inode 2021-01-12 20:16:23 +01:00
edac EDAC/amd64: Fix PCI component registration 2020-12-30 11:51:36 +01:00
eisa
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extcon extcon: max77693: Fix modalias string 2020-12-30 11:51:24 +01:00
firewire
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firmware efi: EFI_EARLYCON should depend on EFI 2020-12-02 08:49:53 +01:00
fpga fpga: dfl: fix bug in port reset handshake 2020-07-29 10:18:31 +02:00
fsi
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gnss gnss: sirf: fix error return code in sirf_probe() 2020-06-22 09:31:20 +02:00
gpio gpio: eic-sprd: break loop when getting NULL device resource 2020-12-30 11:50:55 +01:00
gpu drm/i915/gt: Prevent use of engine->wa_ctx after error 2021-01-27 11:47:42 +01:00
greybus
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hid HID: Ignore battery for Elan touchscreen on ASUS UX550 2021-01-27 11:47:44 +01:00
hsi HSI: omap_ssi: Don't jump to free ID in ssi_add_controller() 2020-12-30 11:51:13 +01:00
hv Drivers: hv: vmbus: Allow cleanup of VMBUS_CONNECT_CPU if disconnected 2020-11-24 13:29:23 +01:00
hwmon hwmon: (pwm-fan) Ensure that calculation doesn't discard big period values 2021-01-19 18:26:15 +01:00
hwspinlock
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hwtracing coresight: etb10: Fix possible NULL ptr dereference in etb_enable_perf() 2020-12-30 11:50:59 +01:00
i2c i2c: bpmp-tegra: Ignore unknown I2C_M flags 2021-01-27 11:47:39 +01:00
i3c i3c master: fix missing destroy_workqueue() on error in i3c_master_register 2021-01-06 14:48:40 +01:00
ide scsi: ide: Do not set the RQF_PREEMPT flag for sense requests 2021-01-12 20:16:09 +01:00
idle
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iio iio: imu: st_lsm6dsx: fix edge-trigger interrupts 2021-01-17 14:05:34 +01:00
infiniband IB/mlx5: Fix error unwinding when set_has_smi_cap fails 2021-01-19 18:26:18 +01:00
input Input: cyapa_gen6 - fix out-of-bounds stack access 2020-12-30 11:51:32 +01:00
interconnect interconnect: qcom: qcs404: Remove GPU and display RPM IDs 2020-12-16 10:56:56 +01:00
iommu iommu/vt-d: Fix unaligned addresses for intel_flush_svm_range_dev() 2021-01-19 18:26:18 +01:00
ipack
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irqchip irqchip/alpine-msi: Fix freeing of interrupts on allocation error path 2020-12-30 11:51:25 +01:00
isdn misdn: dsp: select CONFIG_BITREVERSE 2021-01-19 18:26:15 +01:00
leds leds: bcm6328, bcm6358: use devres LED registering function 2020-11-05 11:43:24 +01:00
lightnvm lightnvm: select CONFIG_CRC32 2021-01-17 14:05:37 +01:00
macintosh macintosh/via-macii: Access autopoll_devs when inside lock 2020-08-19 08:16:15 +02:00
mailbox mailbox: avoid timer start from callback 2020-10-29 09:57:53 +01:00
mcb
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md dm integrity: select CRYPTO_SKCIPHER 2021-01-27 11:47:42 +01:00
media media: gp8psk: initialize stats at power control logic 2021-01-06 14:48:38 +01:00
memory memory: emif: Remove bogus debugfs error handling 2020-11-05 11:43:21 +01:00
memstick memstick: r592: Fix error return in r592_probe() 2020-12-30 11:51:18 +01:00
message scsi: mptfusion: Fix null pointer dereferences in mptscsih_remove() 2020-11-05 11:43:25 +01:00
mfd mfd: sprd: Add wakeup capability for PMIC IRQ 2020-11-18 19:20:26 +01:00
misc habanalabs: Fix memleak in hl_device_reset 2021-01-19 18:26:15 +01:00
mmc mmc: sdhci-xenon: fix 1.8v regulator stabilization 2021-01-27 11:47:41 +01:00
mtd Revert "mtd: spinand: Fix OOB read" 2021-01-09 13:44:54 +01:00
mux
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net net: stmmac: Fixed mtu channged by cache aligned 2021-01-23 15:57:59 +01:00
nfc nfc: s3fwrn5: Release the nfc firmware 2020-12-30 11:51:26 +01:00
ntb NTB: hw: amd: fix an issue about leak system resources 2020-10-29 09:58:00 +01:00
nubus
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nvdimm libnvdimm/namespace: Fix reaping of invalidated block-window-namespace labels 2020-12-30 11:51:47 +01:00
nvme nvme-tcp: fix possible data corruption with bio merges 2021-01-19 18:26:17 +01:00
nvmem nvmem: core: fix possibly memleak when use nvmem_cell_info_to_nvmem_cell() 2020-10-29 09:57:42 +01:00
of of/address: Fix of_node memory leak in of_dma_is_coherent 2020-11-18 19:20:28 +01:00
opp opp: Reduce the size of critical section in _opp_table_kref_release() 2020-11-18 19:20:21 +01:00
oprofile
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parisc parisc: mask out enable and reserved bits from sba imask 2020-08-19 08:16:26 +02:00
parport
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pci PCI: Fix pci_slot_release() NULL pointer dereference 2020-12-30 11:51:47 +01:00
pcmcia
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perf drivers/perf: thunderx2_pmu: Fix memory resource error handling 2020-10-29 09:57:30 +01:00
phy phy: renesas: rcar-gen3-usb2: disable runtime pm in case of failure 2020-12-30 11:51:19 +01:00
pinctrl pinctrl: sunxi: Always call chained_irq_{enter, exit} in sunxi_pinctrl_irq_handler 2020-12-30 11:51:45 +01:00
platform platform/x86: ideapad-laptop: Disable touchpad_switch for ELAN0634 2021-01-27 11:47:39 +01:00
pnp
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power power: supply: bq24190_charger: fix reference leak 2020-12-30 11:51:14 +01:00
powercap powercap: restrict energy meter to root access 2020-11-10 21:13:20 +01:00
pps
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ps3 powerpc/ps3: use dma_mapping_error() 2020-12-30 11:51:26 +01:00
ptp
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pwm pwm: lp3943: Dynamically allocate PWM chip base 2020-12-30 11:51:28 +01:00
rapidio rapidio: fix the missed put_device() for rio_mport_add_riodev 2020-10-29 09:57:53 +01:00
ras
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regulator regulator: bd718x7: Add enable times 2021-01-19 18:26:14 +01:00
remoteproc remoteproc: qcom: Fix potential NULL dereference in adsp_init_mmio() 2020-12-30 11:51:24 +01:00
reset
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rpmsg rpmsg: glink: Use complete_all for open states 2020-11-05 11:43:20 +01:00
rtc rtc: pl031: fix resource leak in pl031_probe 2021-01-06 14:48:39 +01:00
s390 s390/qeth: fix L2 header access in qeth_l3_osa_features_check() 2021-01-17 14:05:32 +01:00
sbus
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scsi scsi: sd: Suppress spurious errors when WRITE SAME is being disabled 2021-01-27 11:47:43 +01:00
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 2020-12-30 11:51:13 +01:00
soc soc: qcom: smp2p: Safely acquire spinlock without IRQs 2020-12-30 11:51:43 +01:00
soundwire soundwire: bus: disable pm_runtime in sdw_slave_delete 2020-10-01 13:17:36 +02:00
spi spi: cadence: cache reference clock rate during probe 2021-01-23 15:58:00 +01:00
spmi
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ssb
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staging exfat: Month timestamp metadata accidentally incremented 2021-01-17 14:05:34 +01:00
target scsi: target: Fix XCOPY NAA identifier lookup 2021-01-12 20:16:25 +01:00
tc
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tee optee: add writeback to valid memory type 2020-12-02 08:49:53 +01:00
thermal thermal/drivers/cpufreq_cooling: Update cpufreq_state only if state has changed 2021-01-06 14:48:35 +01:00
thunderbolt thunderbolt: Fix use-after-free in remove_unplugged_switch() 2020-12-11 13:23:29 +01:00
tty riscv: Fix sifive serial driver 2021-01-27 11:47:43 +01:00
uio uio: Fix use-after-free in uio_unregister_device() 2020-11-18 19:20:29 +01:00
usb usb: ohci: Make distrust_firmware param default to false 2021-01-23 15:57:54 +01:00
vfio vfio iommu: Add dma available capability 2021-01-17 14:05:30 +01:00
vhost vhost_net: fix ubuf refcount incorrectly when sendmsg fails 2021-01-12 20:16:16 +01:00
video video: hyperv_fb: Fix the mmap() regression for v5.4.y and older 2021-01-12 20:16:17 +01:00
virt drivers/virt/fsl_hypervisor: Fix error handling path 2020-10-29 09:57:38 +01:00
virtio virtio_ring: Fix two use after free bugs 2020-12-30 11:51:29 +01:00
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 2020-11-05 11:43:25 +01:00
watchdog watchdog: coh901327: add COMMON_CLK dependency 2020-12-30 11:51:28 +01:00
xen xen: Fix event channel callback via INTX/GSI 2021-01-27 11:47:44 +01:00
zorro
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Kconfig
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Makefile
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