[v2,08/17] drivers/firmware/sdei: Remove while loop in sdei_event_register()
diff mbox series

Message ID 20200722095740.28560-9-gshan@redhat.com
State New
Headers show
Series
  • Refactor SDEI client driver
Related show

Commit Message

Gavin Shan July 22, 2020, 9:57 a.m. UTC
This removes the unnecessary while loop in sdei_event_register().
This shouldn't cause any functional changes.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
v2: Derived from "drivers/firmware/sdei: Drop unnecessary while loop"
---
 drivers/firmware/arm_sdei.c | 52 ++++++++++++++++++-------------------
 1 file changed, 25 insertions(+), 27 deletions(-)

Patch
diff mbox series

diff --git a/drivers/firmware/arm_sdei.c b/drivers/firmware/arm_sdei.c
index 03b1179da9b4..ab1088fbdd37 100644
--- a/drivers/firmware/arm_sdei.c
+++ b/drivers/firmware/arm_sdei.c
@@ -590,36 +590,34 @@  int sdei_event_register(u32 event_num, sdei_event_callback *cb, void *arg)
 	WARN_ON(in_nmi());
 
 	mutex_lock(&sdei_events_lock);
-	do {
-		if (sdei_event_find(event_num)) {
-			pr_warn("Event %u already registered\n", event_num);
-			err = -EBUSY;
-			break;
-		}
+	if (sdei_event_find(event_num)) {
+		pr_warn("Event %u already registered\n", event_num);
+		err = -EBUSY;
+		goto out;
+	}
 
-		event = sdei_event_create(event_num, cb, arg);
-		if (IS_ERR(event)) {
-			err = PTR_ERR(event);
-			pr_warn("Failed to create event %u: %d\n", event_num,
-				err);
-			break;
-		}
+	event = sdei_event_create(event_num, cb, arg);
+	if (IS_ERR(event)) {
+		err = PTR_ERR(event);
+		pr_warn("Failed to create event %u: %d\n", event_num, err);
+		goto out;
+	}
 
-		cpus_read_lock();
-		err = _sdei_event_register(event);
-		if (err) {
-			sdei_event_destroy(event);
-			pr_warn("Failed to register event %u: %d\n", event_num,
-				err);
-		} else {
-			spin_lock(&sdei_list_lock);
-			event->reregister = true;
-			spin_unlock(&sdei_list_lock);
-		}
-		cpus_read_unlock();
-	} while (0);
-	mutex_unlock(&sdei_events_lock);
+	cpus_read_lock();
+	err = _sdei_event_register(event);
+	if (err) {
+		sdei_event_destroy(event);
+		pr_warn("Failed to register event %u: %d\n", event_num, err);
+		goto cpu_unlock;
+	}
 
+	spin_lock(&sdei_list_lock);
+	event->reregister = true;
+	spin_unlock(&sdei_list_lock);
+cpu_unlock:
+	cpus_read_unlock();
+out:
+	mutex_unlock(&sdei_events_lock);
 	return err;
 }