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linux-stable/drivers/xen
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Vitaly Kuznetsov 87dffe86d4 xen/manage: don't complain about an empty value in control/sysrq node 
When guest receives a sysrq request from the host it acknowledges it by
writing '\0' to control/sysrq xenstore node. This, however, make xenstore
watch fire again but xenbus_scanf() fails to parse empty value with "%c"
format string:

 sysrq: SysRq : Emergency Sync
 Emergency Sync complete
 xen:manage: Error -34 reading sysrq code in control/sysrq

Ignore -ERANGE the same way we already ignore -ENOENT, empty value in
control/sysrq is totally legal.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2018-09-14 08:51:10 -04:00
..
events xen: Remove unnecessary BUG_ON from __unbind_from_irq() 2018-06-22 08:32:52 +02:00
xen-pciback treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
xenbus xen: export device state to sysfs 2018-08-28 17:37:40 -04:00
xenfs License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
acpi.c
arm-device.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
balloon.c xen/balloon: Share common memory reservation routines 2018-07-26 23:05:13 -04:00
biomerge.c xen/biomerge: Use true and false for boolean values 2018-08-06 10:20:57 -04:00
cpu_hotplug.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dbgp.c
efi.c xen: Implement EFI reset_system callback 2017-05-02 12:06:50 +02:00
evtchn.c treewide: kvmalloc() -> kvmalloc_array() 2018-06-12 16:19:22 -07:00
fallback.c
features.c
gntalloc.c mm: treewide: remove GFP_TEMPORARY allocation flag 2017-09-13 18:53:16 -07:00
gntdev-common.h xen/gntdev: Add initial support for dma-buf UAPI 2018-07-26 23:05:14 -04:00
gntdev-dmabuf.c drm pull for 4.19-rc1 2018-08-15 17:39:07 -07:00
gntdev-dmabuf.h xen/gntdev: Add initial support for dma-buf UAPI 2018-07-26 23:05:14 -04:00
gntdev.c mm, oom: distinguish blockable mode for mmu notifiers 2018-08-22 10:52:44 -07:00
grant-table.c xen/grant-table: Allow allocating buffers suitable for DMA 2018-07-26 23:05:14 -04:00
Kconfig xen/gntdev: Add initial support for dma-buf UAPI 2018-07-26 23:05:14 -04:00
Makefile xen/gntdev: Add initial support for dma-buf UAPI 2018-07-26 23:05:14 -04:00
manage.c xen/manage: don't complain about an empty value in control/sysrq node 2018-09-14 08:51:10 -04:00
mcelog.c xen/mcelog: eliminate redundant setting of interface version 2018-08-20 14:46:18 -04:00
mem-reservation.c xen/balloon: Share common memory reservation routines 2018-07-26 23:05:13 -04:00
pci.c
pcpu.c
platform-pci.c xen-platform: constify pci_device_id. 2017-08-31 09:45:55 -04:00
preempt.c
privcmd-buf.c xen: add new hypercall buffer mapping device 2018-06-22 08:26:42 +02:00
privcmd.c xen: add new hypercall buffer mapping device 2018-06-22 08:26:42 +02:00
privcmd.h xen: add new hypercall buffer mapping device 2018-06-22 08:26:42 +02:00
pvcalls-back.c xen/pvcalls: fix null pointer dereference on map->sock 2018-02-26 17:13:12 +01:00
pvcalls-front.c pvcalls-front: 64-bit align flags 2018-03-01 07:23:36 +01:00
pvcalls-front.h xen: fix poll misannotation 2018-02-01 10:07:32 -05:00
swiotlb-xen.c xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent 2018-05-18 14:37:16 -04:00
sys-hypervisor.c xen: add sysfs node for hypervisor build id 2017-06-15 08:50:37 +02:00
time.c xen: features and fixes for v4.15-rc1 2017-11-16 13:06:27 -08:00
tmem.c mm, swap, frontswap: fix THP swap if frontswap enabled 2018-02-21 15:35:43 -08:00
xen-acpi-cpuhotplug.c
xen-acpi-memhotplug.c
xen-acpi-pad.c
xen-acpi-processor.c xen/ACPI: don't upload Px/Cx data for disabled processors 2018-08-20 14:46:18 -04:00
xen-balloon.c xen/balloon: fix balloon initialization for PVH Dom0 2018-08-08 11:03:20 -04:00
xen-scsiback.c SCSI misc on 20180815 2018-08-15 22:06:26 -07:00
xen-selfballoon.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-stub.c
xlate_mmu.c