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authorK. Y. Srinivasan <kys@microsoft.com>2015-01-09 23:54:33 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-25 09:17:58 -0800
commit9f52a1630922bcdab75fc72e59ed58db8e164314 (patch)
treed85a3decae84b9b5d36b606a5e38316730490fc3 /drivers/hv/channel.c
parent4061ed9e2aaac31daef44f06e9b83143c78b24b2 (diff)
Drivers: hv: vmbus: Fix a bug in vmbus_establish_gpadl()
Correctly compute the local (gpadl) handle. I would like to thank Michael Brown <mcb30@ipxe.org> for seeing this bug. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Reported-by: Michael Brown <mcb30@ipxe.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hv/channel.c')
-rw-r--r--drivers/hv/channel.c4
1 files 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)