IB/ipath: fix race with exposing reset file

We were accidentally exposing the "reset" sysfs file more than once
per device.

Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/ipath/ipath_diag.c b/drivers/infiniband/hw/ipath/ipath_diag.c
index 7d3fb6996b41..28ddceb260e8 100644
--- a/drivers/infiniband/hw/ipath/ipath_diag.c
+++ b/drivers/infiniband/hw/ipath/ipath_diag.c
@@ -277,13 +277,14 @@ static int ipath_diag_open(struct inode *in, struct file *fp)
 
 bail:
         spin_unlock_irqrestore(&ipath_devs_lock, flags);
-        mutex_unlock(&ipath_mutex);
 
         /* Only expose a way to reset the device if we
            make it into diag mode. */
         if (ret == 0)
                 ipath_expose_reset(&dd->pcidev->dev);
 
+        mutex_unlock(&ipath_mutex);
+
         return ret;
 }