Re: [Intel-wired-lan] [PATCH iwl-next v5 1/4] igc: remove unused autoneg_failed field

["Ruinskiy, Dima" <dima.ruinskiy@intel.com>]

On 08/05/2026 0:47, KhaiWenTan wrote:
> From: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
> 
> autoneg_failed in struct igc_mac_info is never set in the igc driver.
> Remove the field and the dead code checking it in
> igc_config_fc_after_link_up().
> 
> The field originates from the e1000/e1000e fiber/serdes forced-link
> path, where MAC-level autoneg timeout sets it to signal the flow-control
> code to force pause. igc supports only copper, so it never needs to set
> this field.
> 
> Reviewed-by: Looi Hong Aun <hong.aun.looi@intel.com>
> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
> Signed-off-by: Faizal Rahim <faizal.abdul.rahim@linux.intel.com>
> Signed-off-by: Khai Wen Tan <khai.wen.tan@linux.intel.com>
> ---
>   drivers/net/ethernet/intel/igc/igc_hw.h  |  1 -
>   drivers/net/ethernet/intel/igc/igc_mac.c | 16 +---------------
>   2 files changed, 1 insertion(+), 16 deletions(-)
> 
> diff --git a/drivers/net/ethernet/intel/igc/igc_hw.h b/drivers/net/ethernet/intel/igc/igc_hw.h
> index be8a49a86d09..86ab8f566f44 100644
> --- a/drivers/net/ethernet/intel/igc/igc_hw.h
> +++ b/drivers/net/ethernet/intel/igc/igc_hw.h
> @@ -92,7 +92,6 @@ struct igc_mac_info {
>   	bool asf_firmware_present;
>   	bool arc_subsystem_valid;
>   
> -	bool autoneg_failed;
>   	bool get_link_status;
>   };
>   
> diff --git a/drivers/net/ethernet/intel/igc/igc_mac.c b/drivers/net/ethernet/intel/igc/igc_mac.c
> index 7ac6637f8db7..142beb9ae557 100644
> --- a/drivers/net/ethernet/intel/igc/igc_mac.c
> +++ b/drivers/net/ethernet/intel/igc/igc_mac.c
> @@ -438,28 +438,14 @@ void igc_config_collision_dist(struct igc_hw *hw)
>    * Checks the status of auto-negotiation after link up to ensure that the
>    * speed and duplex were not forced.  If the link needed to be forced, then
>    * flow control needs to be forced also.  If auto-negotiation is enabled
> - * and did not fail, then we configure flow control based on our link
> - * partner.
> + * then we configure flow control based on our link partner.
>    */
>   s32 igc_config_fc_after_link_up(struct igc_hw *hw)
>   {
>   	u16 mii_status_reg, mii_nway_adv_reg, mii_nway_lp_ability_reg;
> -	struct igc_mac_info *mac = &hw->mac;
>   	u16 speed, duplex;
>   	s32 ret_val = 0;
>   
> -	/* Check for the case where we have fiber media and auto-neg failed
> -	 * so we had to force link.  In this case, we need to force the
> -	 * configuration of the MAC to match the "fc" parameter.
> -	 */
> -	if (mac->autoneg_failed)
> -		ret_val = igc_force_mac_fc(hw);
> -
> -	if (ret_val) {
> -		hw_dbg("Error forcing flow control settings\n");
> -		goto out;
> -	}
> -
>   	/* In auto-neg, we need to check and see if Auto-Neg has completed,
>   	 * and if so, how the PHY and link partner has flow control
>   	 * configured.
Reviewed-by: Dima Ruinskiy <dima.ruinskiy@intel.com>