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Drivers: hv: balloon: Disable hot add when CONFIG_MEMORY_HOTPLUG is not set

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If the guest does not support memory hotplugging, it should respond to
the host with zero pages added and successful result code. This signals
to the host that hotplugging is not supported and the host will avoid
sending future hot-add requests.

Signed-off-by: Alex Ng <alexng@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Ng 2016-11-06 13:14:08 -08:00 committed by Greg Kroah-Hartman
parent 3da0401b4d
commit 8ba8c0a111
1 changed files with 4 additions and 0 deletions
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4
drivers/hv/hv_balloon.c
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@ -1501,7 +1501,11 @@ static int balloon_probe(struct hv_device *dev,
struct dm_version_request version_req;
struct dm_capabilities cap_msg;
#ifdef CONFIG_MEMORY_HOTPLUG
do_hot_add = hot_add;
#else
do_hot_add = false;
#endif
/*
* First allocate a send buffer.