[PATCH V3 1/1] Drivers: hv: vmbus: Fix a bug in vmbus_establish_gpadl()
K. Y. Srinivasan
kys at microsoft.com
Thu Dec 11 01:13:00 UTC 2014
Correctly compute the local (gpadl) handle.
I would like to thank Michael Brown <mcb30 at ipxe.org> for seeing this bug.
Signed-off-by: K. Y. Srinivasan <kys at microsoft.com>
Reported-by: Michael Brown <mcb30 at ipxe.org>
---
Changes in V2: Added the Reported-by tag.
Changes in V3: Cleaned up the commit log.
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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