In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

This patch fixes the following warnings:

net/bluetooth/rfcomm/core.c:479:6: warning: this statement may fall through 
[-Wimplicit-fallthrough=]
net/bluetooth/l2cap_core.c:4223:6: warning: this statement may fall through 
[-Wimplicit-fallthrough=]

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enabling
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
 net/bluetooth/l2cap_core.c  | 1 +
 net/bluetooth/rfcomm/core.c | 1 +
 2 files changed, 2 insertions(+)

diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 2a7fb517d460..a5b76e24940a 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -4244,6 +4244,7 @@ static inline int l2cap_config_rsp(struct l2cap_conn 
*conn,
                                goto done;
                        break;
                }
+               /* fall through */
 
        default:
                l2cap_chan_set_err(chan, ECONNRESET);
diff --git a/net/bluetooth/rfcomm/core.c b/net/bluetooth/rfcomm/core.c
index 1a635df80643..3a9e9d9670be 100644
--- a/net/bluetooth/rfcomm/core.c
+++ b/net/bluetooth/rfcomm/core.c
@@ -483,6 +483,7 @@ static int __rfcomm_dlc_close(struct rfcomm_dlc *d, int err)
                /* if closing a dlc in a session that hasn't been started,
                 * just close and unlink the dlc
                 */
+               /* fall through */
 
        default:
                rfcomm_dlc_clear_timer(d);
-- 
2.20.1

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