[PATCH v2] net: macb: fixup sparse warnings on __be16 ports

[PATCH v2] net: macb: fixup sparse warnings on __be16 ports

[Ben Dooks]

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..ea5cbfe9ac88 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

Re: [PATCH v2] net: macb: fixup sparse warnings on __be16 ports

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Fri, 15 Jul 2022 18:30:09 +0100 you wrote:
> 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.
> 
> [...]

Here is the summary with links:
  - [v2] net: macb: fixup sparse warnings on __be16 ports
    https://git.kernel.org/netdev/net-next/c/6ee49d629dd6

You are awesome, thank you!
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