[PATCH for-rc or next 2/3] IB/hfi1: Do not destroy link_wq when the device is shut down

[Dennis Dalessandro <dennis.dalessandro@intel.com>]

From: Kaike Wan <kaike.wan@intel.com>

The workqueue link_wq should only be destroyed when the hfi1 driver
is unloaded, not when the device is shut down.

Fixes: 71d47008ca1b ("IB/hfi1: Create workqueue for link events")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/hw/hfi1/init.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/hw/hfi1/init.c b/drivers/infiniband/hw/hfi1/init.c
index 10fb5c6..49a4566 100644
--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -844,6 +844,10 @@ static void destroy_workqueues(struct hfi1_devdata *dd)
 			destroy_workqueue(ppd->hfi1_wq);
 			ppd->hfi1_wq = NULL;
 		}
+		if (ppd->link_wq) {
+			destroy_workqueue(ppd->link_wq);
+			ppd->link_wq = NULL;
+		}
 	}
 }
 
@@ -1120,11 +1124,6 @@ static void shutdown_device(struct hfi1_devdata *dd)
 		 * We can't count on interrupts since we are stopping.
 		 */
 		hfi1_quiet_serdes(ppd);
-
-		if (ppd->link_wq) {
-			destroy_workqueue(ppd->link_wq);
-			ppd->link_wq = NULL;
-		}
 	}
 	sdma_exit(dd);
 }