net/smc: properly handle workqueue allocation failure

In smcd_alloc_dev(), if alloc_ordered_workqueue() fails, properly catch
it, clean up and return NULL to let the caller know there was a failure.
Move the call to alloc_ordered_workqueue higher in the function in order
to abort earlier without needing to unwind the call to device_initialize().

Cc: Ursula Braun <ubraun@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-18-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/smc/smc_ism.c b/net/smc/smc_ism.c
index 6558cf7..94b31f2 100644 (file)
--- a/net/smc/smc_ism.c
+++ b/net/smc/smc_ism.c
@@ -402,6 +402,14 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
                return NULL;
        }
 
+       smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
+                                                WQ_MEM_RECLAIM, name);
+       if (!smcd->event_wq) {
+               kfree(smcd->conn);
+               kfree(smcd);
+               return NULL;
+       }
+
        smcd->dev.parent = parent;
        smcd->dev.release = smcd_release;
        device_initialize(&smcd->dev);
@@ -415,8 +423,6 @@ struct smcd_dev *smcd_alloc_dev(struct device *parent, const char *name,
        INIT_LIST_HEAD(&smcd->vlan);
        INIT_LIST_HEAD(&smcd->lgr_list);
        init_waitqueue_head(&smcd->lgrs_deleted);
-       smcd->event_wq = alloc_ordered_workqueue("ism_evt_wq-%s)",
-                                                WQ_MEM_RECLAIM, name);
        return smcd;
 }
 EXPORT_SYMBOL_GPL(smcd_alloc_dev);