linux-kernel - [PATCH 1/3] net: macb: check constant to define and fix _

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Message-Id: <20230622130507.606713-2-ben.dooks@codethink.co.uk>
Date:   Thu, 22 Jun 2023 14:05:05 +0100
From:   Ben Dooks <ben.dooks@...ethink.co.uk>
To:     netdev@...r.kernel.org, pabeni@...hat.com, kuba@...nel.org,
        edumazet@...gle.com, davem@...emloft.net
Cc:     linux-kernel@...r.kernel.org, claudiu.beznea@...rochip.com,
        nicolas.ferre@...rochip.com, Ben Dooks <ben.dooks@...ethink.co.uk>
Subject: [PATCH 1/3] net: macb: check constant to define and fix __be32 warnings

The checks on ipv4 addresses in the filtering code check against
a constant of 0xFFFFFFFF, so replace it with MACB_IPV4_MASK and
then make sure it is of __be32 type to avoid the following
sparse warnigns:

drivers/net/ethernet/cadence/macb_main.c:3448:39: warning: restricted __be32 degrades to integer
drivers/net/ethernet/cadence/macb_main.c:3453:39: warning: restricted __be32 degrades to integer
drivers/net/ethernet/cadence/macb_main.c:3483:20: warning: restricted __be32 degrades to integer
drivers/net/ethernet/cadence/macb_main.c:3497:20: warning: restricted __be32 degrades to integer

Signed-off-by: Ben Dooks <ben.dooks@...ethink.co.uk>
---
 drivers/net/ethernet/cadence/macb_main.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index f20ec0d5260b..538d4c7e023b 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3418,6 +3418,8 @@ static int macb_get_ts_info(struct net_device *netdev,
 	return ethtool_op_get_ts_info(netdev, info);
 }
 
+#define MACB_IPV4_MASK htonl(0xFFFFFFFF)
+
 static void gem_enable_flow_filters(struct macb *bp, bool enable)
 {
 	struct net_device *netdev = bp->dev;
@@ -3445,12 +3447,12 @@ static void gem_enable_flow_filters(struct macb *bp, bool enable)
 		/* only enable fields with no masking */
 		tp4sp_m = &(fs->m_u.tcp_ip4_spec);
 
-		if (enable && (tp4sp_m->ip4src == 0xFFFFFFFF))
+		if (enable && (tp4sp_m->ip4src == MACB_IPV4_MASK))
 			t2_scr = GEM_BFINS(CMPAEN, 1, t2_scr);
 		else
 			t2_scr = GEM_BFINS(CMPAEN, 0, t2_scr);
 
-		if (enable && (tp4sp_m->ip4dst == 0xFFFFFFFF))
+		if (enable && (tp4sp_m->ip4dst == MACB_IPV4_MASK))
 			t2_scr = GEM_BFINS(CMPBEN, 1, t2_scr);
 		else
 			t2_scr = GEM_BFINS(CMPBEN, 0, t2_scr);
@@ -3480,7 +3482,7 @@ static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs)
 	tp4sp_m = &(fs->m_u.tcp_ip4_spec);
 
 	/* ignore field if any masking set */
-	if (tp4sp_m->ip4src == 0xFFFFFFFF) {
+	if (tp4sp_m->ip4src == MACB_IPV4_MASK) {
 		/* 1st compare reg - IP source address */
 		w0 = 0;
 		w1 = 0;
@@ -3494,7 +3496,7 @@ static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs)
 	}
 
 	/* ignore field if any masking set */
-	if (tp4sp_m->ip4dst == 0xFFFFFFFF) {
+	if (tp4sp_m->ip4dst == MACB_IPV4_MASK) {
 		/* 2nd compare reg - IP destination address */
 		w0 = 0;
 		w1 = 0;
-- 
2.40.1