netdev - [PATCH iwl-next v3 2/5] e1000e: drop unnecessary constant casts to u16

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Message-ID: <6d05300d-e5d7-409e-8b78-a7c3da21ed32@jacekk.info>
Date: Wed, 23 Jul 2025 10:54:35 +0200
From: Jacek Kowalski <jacek@...ekk.info>
To: Tony Nguyen <anthony.l.nguyen@...el.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Simon Horman <horms@...nel.org>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: [PATCH iwl-next v3 2/5] e1000e: drop unnecessary constant casts to
 u16

Remove unnecessary casts of constant values to u16.
C's integer promotion rules make them ints no matter what.

Additionally replace E1000_MNG_VLAN_NONE with resulting value
rather than casting -1 to u16.

Signed-off-by: Jacek Kowalski <jacek@...ekk.info>
Suggested-by: Simon Horman <horms@...nel.org>
---
 drivers/net/ethernet/intel/e1000e/e1000.h   | 2 +-
 drivers/net/ethernet/intel/e1000e/ethtool.c | 2 +-
 drivers/net/ethernet/intel/e1000e/netdev.c  | 4 ++--
 drivers/net/ethernet/intel/e1000e/nvm.c     | 4 ++--
 4 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/intel/e1000e/e1000.h b/drivers/net/ethernet/intel/e1000e/e1000.h
index 952898151565..018e61aea787 100644
--- a/drivers/net/ethernet/intel/e1000e/e1000.h
+++ b/drivers/net/ethernet/intel/e1000e/e1000.h
@@ -64,7 +64,7 @@ struct e1000_info;
 #define AUTO_ALL_MODES			0
 #define E1000_EEPROM_APME		0x0400
 
-#define E1000_MNG_VLAN_NONE		(-1)
+#define E1000_MNG_VLAN_NONE		0xFFFF
 
 #define DEFAULT_JUMBO			9234
 
diff --git a/drivers/net/ethernet/intel/e1000e/ethtool.c b/drivers/net/ethernet/intel/e1000e/ethtool.c
index c0bbb12eed2e..06482ad50508 100644
--- a/drivers/net/ethernet/intel/e1000e/ethtool.c
+++ b/drivers/net/ethernet/intel/e1000e/ethtool.c
@@ -959,7 +959,7 @@ static int e1000_eeprom_test(struct e1000_adapter *adapter, u64 *data)
 	}
 
 	/* If Checksum is not Correct return error else test passed */
-	if ((checksum != (u16)NVM_SUM) && !(*data))
+	if (checksum != NVM_SUM && !(*data))
 		*data = 2;
 
 	return *data;
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 7719e15813ee..58cfc63e95ac 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -2761,7 +2761,7 @@ static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
 		rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
 		ew32(RCTL, rctl);
 
-		if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
+		if (adapter->mng_vlan_id != E1000_MNG_VLAN_NONE) {
 			e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
 					       adapter->mng_vlan_id);
 			adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
@@ -2828,7 +2828,7 @@ static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
 		adapter->mng_vlan_id = vid;
 	}
 
-	if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
+	if (old_vid != E1000_MNG_VLAN_NONE && vid != old_vid)
 		e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid);
 }
 
diff --git a/drivers/net/ethernet/intel/e1000e/nvm.c b/drivers/net/ethernet/intel/e1000e/nvm.c
index 16369e6d245a..4bde1c9de1b9 100644
--- a/drivers/net/ethernet/intel/e1000e/nvm.c
+++ b/drivers/net/ethernet/intel/e1000e/nvm.c
@@ -564,7 +564,7 @@ s32 e1000e_validate_nvm_checksum_generic(struct e1000_hw *hw)
 		return 0;
 	}
 
-	if (checksum != (u16)NVM_SUM) {
+	if (checksum != NVM_SUM) {
 		e_dbg("NVM Checksum Invalid\n");
 		return -E1000_ERR_NVM;
 	}
@@ -594,7 +594,7 @@ s32 e1000e_update_nvm_checksum_generic(struct e1000_hw *hw)
 		}
 		checksum += nvm_data;
 	}
-	checksum = (u16)NVM_SUM - checksum;
+	checksum = NVM_SUM - checksum;
 	ret_val = e1000_write_nvm(hw, NVM_CHECKSUM_REG, 1, &checksum);
 	if (ret_val)
 		e_dbg("NVM Write Error while updating checksum.\n");
-- 
2.47.2