[PATCH RESEND 5/6] Drivers: hv: vmbus: Fix a bug in vmbus_establish_gpadl()

[K. Y. Srinivasan]

Correctly compute the local (gpadl) handle.
I would like to thank Michael Brown <mcb30@xxxxxxxx> for seeing this bug.

Signed-off-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
Reported-by: Michael Brown <mcb30@xxxxxxxx>
---
 drivers/hv/channel.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 433f72a..c76ffbe 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -366,8 +366,8 @@ int vmbus_establish_gpadl(struct vmbus_channel *channel, void *kbuffer,
 	unsigned long flags;
 	int ret = 0;
 
-	next_gpadl_handle = atomic_read(&vmbus_connection.next_gpadl_handle);
-	atomic_inc(&vmbus_connection.next_gpadl_handle);
+	next_gpadl_handle =
+		(atomic_inc_return(&vmbus_connection.next_gpadl_handle) - 1);
 
 	ret = create_gpadl_header(kbuffer, size, &msginfo, &msgcount);
 	if (ret)
-- 
1.7.4.1

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