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Drivers: hv: Save and export negotiated vmbus version

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Export the negotiated vmbus version as this may be useful for
individual drivers.

Signed-off-by: K. Y. Srinivasan <[email protected]>
Reviewed-by: Haiyang Zhang <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
K. Y. Srinivasan 2012-12-01 06:46:41 -08:00 • committed by Greg Kroah-Hartman
commit 37f7278b81
2 changed files with 15 additions and 0 deletions
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9
drivers/hv/connection.c
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@ -30,6 +30,7 @@
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/hyperv.h>
#include <linux/export.h>
#include <asm/hyperv.h>
#include "hyperv_vmbus.h"
@ -54,6 +55,12 @@ struct vmbus_connection vmbus_connection = {
#define VERSION_INVAL -1
/*
* Negotiated protocol version with the host.
*/
__u32 vmbus_proto_version;
EXPORT_SYMBOL_GPL(vmbus_proto_version);
static __u32 vmbus_get_next_version(__u32 current_version)
{
switch (current_version) {
@ -215,6 +222,8 @@ int vmbus_connect(void)
if (version == VERSION_INVAL)
goto cleanup;
vmbus_proto_version = version;
pr_info("Negotiated host information %d\n", version);
kfree(msginfo);
return 0;