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From:   Ben Dooks <ben.dooks@sifive.com>
To:     linux-kernel@vger.kernel.org
Cc:     Sudip Mukherjee <sudip.mukherjee@sifive.com>,
        Jude Onyenegecha <jude.onyenegecha@sifive.com>,
        Nicolas Ferre <nicolas.ferre@microchip.com>,
        Claudiu Beznea <claudiu.beznea@microchip.com>,
        "David S . Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>, netdev@vger.kernel.org,
        Ben Dooks <ben.dooks@sifive.com>
Subject: [PATCH] net: macb: fixup sparse warnings on __be16 ports
Date:   Thu, 14 Jul 2022 09:43:05 +0100
Message-Id: <20220714084305.209425-1-ben.dooks@sifive.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

The port fields in the ethool flow structures are defined
to be __be16 types, so sparse is showing issues where these
are being passed to htons(). Fix these warnings by passing
them to be16_to_cpu() instead.

These are being used in netdev_dbg() so should only effect
anyone doing debug.

Fixes the following sparse warnings:

drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3366:9: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16
drivers/net/ethernet/cadence/macb_main.c:3419:25: warning: cast from restricted __be16

Signed-off-by: Ben Dooks <ben.dooks@sifive.com>

--
Note, given the IP is also being passed ot htons() should
this either be changed to be32_to_cpu() or better passed
as a pointre and the %pI4 be used to print it.
---
 drivers/net/ethernet/cadence/macb_main.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index d89098f4ede8..f38b924e393b 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3482,7 +3482,8 @@ static int gem_add_flow_filter(struct net_device *netdev,
 			fs->flow_type, (int)fs->ring_cookie, fs->location,
 			htonl(fs->h_u.tcp_ip4_spec.ip4src),
 			htonl(fs->h_u.tcp_ip4_spec.ip4dst),
-			htons(fs->h_u.tcp_ip4_spec.psrc), htons(fs->h_u.tcp_ip4_spec.pdst));
+		        be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
+		        be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
 
 	spin_lock_irqsave(&bp->rx_fs_lock, flags);
 
@@ -3535,8 +3536,8 @@ static int gem_del_flow_filter(struct net_device *netdev,
 					fs->flow_type, (int)fs->ring_cookie, fs->location,
 					htonl(fs->h_u.tcp_ip4_spec.ip4src),
 					htonl(fs->h_u.tcp_ip4_spec.ip4dst),
-					htons(fs->h_u.tcp_ip4_spec.psrc),
-					htons(fs->h_u.tcp_ip4_spec.pdst));
+					be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
+					be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
 
 			gem_writel_n(bp, SCRT2, fs->location, 0);
 
-- 
2.35.1