[PATCH 4.9 07/96] staging: comedi: ni_660x: fix missing break in switch statement

[Greg Kroah-Hartman]

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

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

From: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>

commit 479826cc86118e0d87e5cefb3df5b748e0480924 upstream.

Add missing break statement in order to prevent the code from falling
through to the default case and return -EINVAL every time.

This bug was found thanks to the ongoing efforts to enable
-Wimplicit-fallthrough.

Fixes: aa94f2888825 ("staging: comedi: ni_660x: tidy up ni_660x_set_pfi_routing()")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Reviewed-by: Ian Abbott <abbotti@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/staging/comedi/drivers/ni_660x.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -606,6 +606,7 @@ static int ni_660x_set_pfi_routing(struc
 	case NI_660X_PFI_OUTPUT_DIO:
 		if (chan > 31)
 			return -EINVAL;
+		break;
 	default:
 		return -EINVAL;
 	}