HID: playstation: Document spinlock_t usage

Document the usage of 'lock' member in struct ps_device and silent
checkpatch.pl complaint:

  CHECK: spinlock_t definition without comment

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Benjamin Tissoires <bentiss@kernel.org>
Tested-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index 811b0b90c0e277fe6a511a9a766790125d9602c5..37fc1a74517c1f14a7bae9a1fa90f7d64115a605 100644 (file)
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -38,7 +38,7 @@ enum PS_TYPE {
 struct ps_device {
        struct list_head list;
        struct hid_device *hdev;
-       spinlock_t lock;
+       spinlock_t lock; /* Sync between event handler and workqueue */
 
        u32 player_id;