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-rw-r--r--kernel/padata.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index ff8de1b71e4e..e7d723a3e31d 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -485,6 +485,11 @@ static void padata_flush_queues(struct parallel_data *pd)
BUG_ON(atomic_read(&pd->refcnt) != 0);
}
+static void __padata_start(struct padata_instance *pinst)
+{
+ pinst->flags |= PADATA_INIT;
+}
+
/* Replace the internal control stucture with a new one. */
static void padata_replace(struct padata_instance *pinst,
struct parallel_data *pd_new)
@@ -619,11 +624,20 @@ EXPORT_SYMBOL(padata_remove_cpu);
*
* @pinst: padata instance to start
*/
-void padata_start(struct padata_instance *pinst)
+int padata_start(struct padata_instance *pinst)
{
+ int err = 0;
+
mutex_lock(&pinst->lock);
- pinst->flags |= PADATA_INIT;
+
+ if (pinst->flags & PADATA_INVALID)
+ err =-EINVAL;
+
+ __padata_start(pinst);
+
mutex_unlock(&pinst->lock);
+
+ return err;
}
EXPORT_SYMBOL(padata_start);

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