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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-09-06 13:26:08 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-10-10 08:52:13 +0200 |
| commit | 6899f2fe641c66569327284ce02242f9cc4f7b8d (patch) | |
| tree | 9c570a45db48abff1e21bc4c51596caa7703c4bf /kernel/sysctl_binary.c | |
| parent | cd65a43f4dfb75a6bb5211ce28e65e5429b7c499 (diff) | |
xen/manage: don't complain about an empty value in control/sysrq node
[ Upstream commit 87dffe86d406bee8782cac2db035acb9a28620a7 ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sysctl_binary.c')
0 files changed, 0 insertions, 0 deletions