linux-kernel - [PATCH] sfc: replace min/max nesting with clamp()

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Message-Id: <20250812065026.620115-1-zhao.xichao@vivo.com>
Date: Tue, 12 Aug 2025 14:50:26 +0800
From: Xichao Zhao <zhao.xichao@...o.com>
To: ecree.xilinx@...il.com,
	andrew+netdev@...n.ch,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: netdev@...r.kernel.org,
	linux-net-drivers@....com,
	linux-kernel@...r.kernel.org,
	Xichao Zhao <zhao.xichao@...o.com>
Subject: [PATCH] sfc: replace min/max nesting with clamp()

The clamp() macro explicitly expresses the intent of constraining
a value within bounds.Therefore, replacing min(max(a, b), c) with
clamp(val, lo, hi) can improve code readability.

Signed-off-by: Xichao Zhao <zhao.xichao@...o.com>
---
 drivers/net/ethernet/sfc/efx_channels.c       | 4 ++--
 drivers/net/ethernet/sfc/falcon/efx.c         | 5 ++---
 drivers/net/ethernet/sfc/siena/efx_channels.c | 4 ++--
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/sfc/efx_channels.c b/drivers/net/ethernet/sfc/efx_channels.c
index 06b4f52713ef..0f66324ed351 100644
--- a/drivers/net/ethernet/sfc/efx_channels.c
+++ b/drivers/net/ethernet/sfc/efx_channels.c
@@ -216,8 +216,8 @@ static int efx_allocate_msix_channels(struct efx_nic *efx,
 
 	if (efx_separate_tx_channels) {
 		efx->n_tx_channels =
-			min(max(n_channels / 2, 1U),
-			    efx->max_tx_channels);
+			clamp(n_channels / 2, 1U,
+			      efx->max_tx_channels);
 		efx->tx_channel_offset =
 			n_channels - efx->n_tx_channels;
 		efx->n_rx_channels =
diff --git a/drivers/net/ethernet/sfc/falcon/efx.c b/drivers/net/ethernet/sfc/falcon/efx.c
index b07f7e4e2877..d19fbf8732ff 100644
--- a/drivers/net/ethernet/sfc/falcon/efx.c
+++ b/drivers/net/ethernet/sfc/falcon/efx.c
@@ -1394,9 +1394,8 @@ static int ef4_probe_interrupts(struct ef4_nic *efx)
 			if (n_channels > extra_channels)
 				n_channels -= extra_channels;
 			if (ef4_separate_tx_channels) {
-				efx->n_tx_channels = min(max(n_channels / 2,
-							     1U),
-							 efx->max_tx_channels);
+				efx->n_tx_channels = clamp(n_channels / 2, 1U,
+							   efx->max_tx_channels);
 				efx->n_rx_channels = max(n_channels -
 							 efx->n_tx_channels,
 							 1U);
diff --git a/drivers/net/ethernet/sfc/siena/efx_channels.c b/drivers/net/ethernet/sfc/siena/efx_channels.c
index d120b3c83ac0..703419866d18 100644
--- a/drivers/net/ethernet/sfc/siena/efx_channels.c
+++ b/drivers/net/ethernet/sfc/siena/efx_channels.c
@@ -217,8 +217,8 @@ static int efx_allocate_msix_channels(struct efx_nic *efx,
 
 	if (efx_siena_separate_tx_channels) {
 		efx->n_tx_channels =
-			min(max(n_channels / 2, 1U),
-			    efx->max_tx_channels);
+			clamp(n_channels / 2, 1U,
+			      efx->max_tx_channels);
 		efx->tx_channel_offset =
 			n_channels - efx->n_tx_channels;
 		efx->n_rx_channels =
-- 
2.34.1