netdev - Re: [PATCH net-next] ixgbe: Remove redundant self-assignments in ACI command execution

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Message-ID: <Z34bRACSRyOWRQoM@mev-dev.igk.intel.com>
Date: Wed, 8 Jan 2025 07:29:24 +0100
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@...il.com>
Cc: anthony.l.nguyen@...el.com, przemyslaw.kitszel@...el.com,
	andrew+netdev@...n.ch, davem@...emloft.net, edumazet@...gle.com,
	kuba@...nel.org, pabeni@...hat.com,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] ixgbe: Remove redundant self-assignments in ACI
 command execution

On Wed, Jan 08, 2025 at 11:06:14AM +0530, Dheeraj Reddy Jonnalagadda wrote:
> Remove redundant statements in ixgbe_aci_send_cmd_execute() where
> raw_desc[i] is assigned to itself. These self-assignments have no
> effect and can be safely removed.
> 
> Fixes: 46761fd52a88 ("ixgbe: Add support for E610 FW Admin Command Interface")
> Closes: https://scan7.scan.coverity.com/#/project-view/52337/11354?selectedIssue=1602757
> Signed-off-by: Dheeraj Reddy Jonnalagadda <dheeraj.linuxdev@...il.com>
> ---
>  drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
> index 683c668672d6..408c0874cdc2 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_e610.c
> @@ -145,7 +145,6 @@ static int ixgbe_aci_send_cmd_execute(struct ixgbe_hw *hw,
>  	if ((hicr & IXGBE_PF_HICR_SV)) {
>  		for (i = 0; i < IXGBE_ACI_DESC_SIZE_IN_DWORDS; i++) {
>  			raw_desc[i] = IXGBE_READ_REG(hw, IXGBE_PF_HIDA(i));
> -			raw_desc[i] = raw_desc[i];

raw_desc should be always in le32, probably there was a conversion which
was removed between patchset versions. Adding orginal author in CC to
confirm that no conversion here is fine.

Thanks,
Michal

>  		}
>  	}
>  
> @@ -153,7 +152,6 @@ static int ixgbe_aci_send_cmd_execute(struct ixgbe_hw *hw,
>  	if ((hicr & IXGBE_PF_HICR_EV) && !(hicr & IXGBE_PF_HICR_C)) {
>  		for (i = 0; i < IXGBE_ACI_DESC_SIZE_IN_DWORDS; i++) {
>  			raw_desc[i] = IXGBE_READ_REG(hw, IXGBE_PF_HIDA_2(i));
> -			raw_desc[i] = raw_desc[i];
>  		}
>  	}
>  
> -- 
> 2.34.1