net: dp83640: Mark expected switch fall-throughs

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

Notice that in this particular case, I replaced the code comment at the top of the switch statement with a proper "fall through" annotation for each case, which is what GCC is expecting to find.

Addresses-Coverity-ID: 1056542 ("Missing break in switch")
Addresses-Coverity-ID: 1339579 ("Missing break in switch")
Addresses-Coverity-ID: 1369526 ("Missing break in switch")

---
 drivers/net/phy/dp83640.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

index 79e9b10..29aa8d7 100644
@@ -757,13 +757,16 @@ static int decode_evnt(struct dp83640_private *dp83640,
 
 	phy_txts = data;
 
-	switch (words) { /* fall through in every case */
+	switch (words) {
 	case 3:
 		dp83640->edata.sec_hi = phy_txts->sec_hi;
+		/* fall through */
 	case 2:
 		dp83640->edata.sec_lo = phy_txts->sec_lo;
+		/* fall through */
 	case 1:
 		dp83640->edata.ns_hi = phy_txts->ns_hi;
+		/* fall through */
 	case 0:
 		dp83640->edata.ns_lo = phy_txts->ns_lo;
 	}

2.7.4

From: "Gustavo A. R. Silva" <[email protected]>
Date: Thu, 9 Aug 2018 10:08:24 -0500

Applied, thanks.