netdev - RE: [Intel-wired-lan] [PATCH iwl-next v3 1/5] e1000: drop unnecessary constant casts to u16

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Message-ID: <IA3PR11MB89860B51341D18976D2ACA7AE55FA@IA3PR11MB8986.namprd11.prod.outlook.com>
Date: Wed, 23 Jul 2025 10:06:35 +0000
From: "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To: Jacek Kowalski <jacek@...ekk.info>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "Kitszel, Przemyslaw"
	<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" <intel-wired-lan@...ts.osuosl.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next v3 1/5] e1000: drop unnecessary
 constant casts to u16



> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf
> Of Jacek Kowalski
> Sent: Wednesday, July 23, 2025 10:54 AM
> To: Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Kitszel,
> Przemyslaw <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: [Intel-wired-lan] [PATCH iwl-next v3 1/5] e1000: 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>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> ---
>  drivers/net/ethernet/intel/e1000/e1000.h         | 2 +-
>  drivers/net/ethernet/intel/e1000/e1000_ethtool.c | 2 +-
>  drivers/net/ethernet/intel/e1000/e1000_hw.c      | 4 ++--
>  drivers/net/ethernet/intel/e1000/e1000_main.c    | 3 +--
>  4 files changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/e1000/e1000.h
> b/drivers/net/ethernet/intel/e1000/e1000.h
> index 75f3fd1d8d6e..ea6ccf4b728b 100644
> --- a/drivers/net/ethernet/intel/e1000/e1000.h
> +++ b/drivers/net/ethernet/intel/e1000/e1000.h
> @@ -116,7 +116,7 @@ struct e1000_adapter;
>  #define E1000_MASTER_SLAVE	e1000_ms_hw_default
>  #endif
> 
> -#define E1000_MNG_VLAN_NONE	(-1)
> +#define E1000_MNG_VLAN_NONE	0xFFFF
> 
>  /* wrapper around a pointer to a socket buffer,
>   * so a DMA handle can be stored along with the buffer diff --git
> a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c
> b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c
> index d06d29c6c037..726365c567ef 100644
> --- a/drivers/net/ethernet/intel/e1000/e1000_ethtool.c
> +++ b/drivers/net/ethernet/intel/e1000/e1000_ethtool.c
> @@ -806,7 +806,7 @@ static int e1000_eeprom_test(struct e1000_adapter
> *adapter, u64 *data)
>  	}
> 
>  	/* If Checksum is not Correct return error else test passed */
> -	if ((checksum != (u16)EEPROM_SUM) && !(*data))
> +	if (checksum != EEPROM_SUM && !(*data))
>  		*data = 2;
> 
>  	return *data;
> diff --git a/drivers/net/ethernet/intel/e1000/e1000_hw.c
> b/drivers/net/ethernet/intel/e1000/e1000_hw.c
> index f9328f2e669f..0e5de52b1067 100644
> --- a/drivers/net/ethernet/intel/e1000/e1000_hw.c
> +++ b/drivers/net/ethernet/intel/e1000/e1000_hw.c
> @@ -3970,7 +3970,7 @@ s32 e1000_validate_eeprom_checksum(struct
> e1000_hw *hw)
>  		return E1000_SUCCESS;
> 
>  #endif
> -	if (checksum == (u16)EEPROM_SUM)
> +	if (checksum == EEPROM_SUM)
>  		return E1000_SUCCESS;
>  	else {
>  		e_dbg("EEPROM Checksum Invalid\n");
> @@ -3997,7 +3997,7 @@ s32 e1000_update_eeprom_checksum(struct e1000_hw
> *hw)
>  		}
>  		checksum += eeprom_data;
>  	}
> -	checksum = (u16)EEPROM_SUM - checksum;
> +	checksum = EEPROM_SUM - checksum;
>  	if (e1000_write_eeprom(hw, EEPROM_CHECKSUM_REG, 1, &checksum) <
> 0) {
>  		e_dbg("EEPROM Write Error\n");
>  		return -E1000_ERR_EEPROM;
> diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c
> b/drivers/net/ethernet/intel/e1000/e1000_main.c
> index d8595e84326d..292389aceb2d 100644
> --- a/drivers/net/ethernet/intel/e1000/e1000_main.c
> +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
> @@ -313,8 +313,7 @@ static void e1000_update_mng_vlan(struct
> e1000_adapter *adapter)
>  		} else {
>  			adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
>  		}
> -		if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
> -		    (vid != old_vid) &&
> +		if (old_vid != E1000_MNG_VLAN_NONE && vid != old_vid &&
>  		    !test_bit(old_vid, adapter->active_vlans))
>  			e1000_vlan_rx_kill_vid(netdev,
> htons(ETH_P_8021Q),
>  					       old_vid);
> --
> 2.47.2