[PATCH 5.7 108/166] IB/hfi1: Do not destroy link_wq when the device is shut down

[Greg Kroah-Hartman]

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

commit 2315ec12ee8e8257bb335654c62e0cae71dc278d upstream.

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")
Link: 
https://lore.kernel.org/r/20200623204053.107638.70315.st...@awfm-01.aw.intel.com
Cc: <sta...@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marcinis...@intel.com>
Signed-off-by: Kaike Wan <kaike....@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessan...@intel.com>
Signed-off-by: Jason Gunthorpe <j...@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/infiniband/hw/hfi1/init.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/infiniband/hw/hfi1/init.c
+++ b/drivers/infiniband/hw/hfi1/init.c
@@ -844,6 +844,10 @@ static void destroy_workqueues(struct hf
                        destroy_workqueue(ppd->hfi1_wq);
                        ppd->hfi1_wq = NULL;
                }
+               if (ppd->link_wq) {
+                       destroy_workqueue(ppd->link_wq);
+                       ppd->link_wq = NULL;
+               }
        }
 }
 
@@ -1120,14 +1124,10 @@ static void shutdown_device(struct hfi1_
                 * We can't count on interrupts since we are stopping.
                 */
                hfi1_quiet_serdes(ppd);
-
                if (ppd->hfi1_wq)
                        flush_workqueue(ppd->hfi1_wq);
-               if (ppd->link_wq) {
+               if (ppd->link_wq)
                        flush_workqueue(ppd->link_wq);
-                       destroy_workqueue(ppd->link_wq);
-                       ppd->link_wq = NULL;
-               }
        }
        sdma_exit(dd);
 }