From 9f52a1630922bcdab75fc72e59ed58db8e164314 Mon Sep 17 00:00:00 2001 From: "K. Y. Srinivasan" Date: Fri, 9 Jan 2015 23:54:33 -0800 Subject: [PATCH] Drivers: hv: vmbus: Fix a bug in vmbus_establish_gpadl() Correctly compute the local (gpadl) handle. I would like to thank Michael Brown for seeing this bug. Signed-off-by: K. Y. Srinivasan Reported-by: Michael Brown Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 433f72a1c006..c76ffbe59f65 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) -- 2.34.1