usb: musb: add code comment for clarification

Add code comment to make it clear that the fall-through is intentional.
Read the link for more details: https://lkml.org/lkml/2017/2/9/292

Addresses-Coverity-ID: 1397608
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 892088f..d8bae6c 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1869,6 +1869,7 @@ static void musb_pm_runtime_check_session(struct musb *musb)
 
                        return;
                }
+               /* fall through */
        case MUSB_QUIRK_A_DISCONNECT_19:
                if (musb->quirk_retries--) {
                        musb_dbg(musb,