It can be called multiple times, so has to be idempotent.
---
drivers/usb/gadget/u_serial.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c
index d9f7756..85450d3 100644
--- a/drivers/usb/gadget/u_serial.c
+++ b/drivers/usb/gadget/u_serial.c
@@ -159,6 +159,8 @@ static int gs_buf_alloc(struct gs_buf *gb)
* gs_buf_free
*
* Free the buffer and all associated memory.
+ * Must be idempotent; we call this early if possible, and again on
+ * final disconnect.
*/
static void gs_buf_free(struct gs_buf *gb)
{
--
1.6.3.3
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