[PATCH 4.9 20/28] ptp: fix missing break in switch

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Gustavo A. R. Silva" <gust...@embeddedor.com>

[ Upstream commit 9ba8376ce1e2cbf4ce44f7e4bee1d0648e10d594 ]

It seems that a *break* is missing in order to avoid falling through
to the default case. Otherwise, checking *chan* makes no sense.

Fixes: 72df7a7244c0 ("ptp: Allow reassigning calibration pin function")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
Acked-by: Richard Cochran <richardcoch...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/ptp/ptp_chardev.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/ptp/ptp_chardev.c
+++ b/drivers/ptp/ptp_chardev.c
@@ -89,6 +89,7 @@ int ptp_set_pinfunc(struct ptp_clock *pt
        case PTP_PF_PHYSYNC:
                if (chan != 0)
                        return -EINVAL;
+               break;
        default:
                return -EINVAL;
        }