> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf Of
> Jesse Brandeburg
> Sent: Thursday, March 6, 2025 6:57 PM
> To: [email protected]
> Cc: Brandeburg, Jesse <[email protected]>;
> [email protected]; [email protected]; [email protected];
> [email protected]; Kitszel, Przemyslaw <[email protected]>;
> Ertman, David M <[email protected]>
> Subject: [Intel-wired-lan] [PATCH intel-net v2] ice: fix reservation of
> resources
> for RDMA when disabled
>
> From: Jesse Brandeburg <[email protected]>
>
> If the CONFIG_INFINIBAND_IRDMA symbol is not enabled as a module or a
> built-in, then don't let the driver reserve resources for RDMA. The result of
> this
> change is a large savings in resources for older kernels, and a cleaner driver
> configuration for the IRDMA=n case for old and new kernels.
>
> Implement this by avoiding enabling the RDMA capability when scanning
> hardware capabilities.
>
> Note: Loading the out-of-tree irdma driver in connection to the in-kernel ice
> driver, is not supported, and should not be attempted, especially when
> disabling IRDMA in the kernel config.
>
> Fixes: d25a0fc41c1f ("ice: Initialize RDMA support")
> Signed-off-by: Jesse Brandeburg <[email protected]>
> Acked-by: Dave Ertman <[email protected]>
Reviewed-by: Aleksandr Loktionov <[email protected]>
> ---
> v2: resend with acks, add note about oot irdma (Leon), reword commit
> message
> v1: https://lore.kernel.org/netdev/20241114000105.703740-1-
> [email protected]/
> ---
> drivers/net/ethernet/intel/ice/ice_common.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/ice/ice_common.c
> b/drivers/net/ethernet/intel/ice/ice_common.c
> index 7a2a2e8da8fa..1e801300310e 100644
> --- a/drivers/net/ethernet/intel/ice/ice_common.c
> +++ b/drivers/net/ethernet/intel/ice/ice_common.c
> @@ -2271,7 +2271,8 @@ ice_parse_common_caps(struct ice_hw *hw, struct
> ice_hw_common_caps *caps,
> caps->nvm_unified_update);
> break;
> case ICE_AQC_CAPS_RDMA:
> - caps->rdma = (number == 1);
> + if (IS_ENABLED(CONFIG_INFINIBAND_IRDMA))
> + caps->rdma = (number == 1);
> ice_debug(hw, ICE_DBG_INIT, "%s: rdma = %d\n", prefix, caps-
> >rdma);
> break;
> case ICE_AQC_CAPS_MAX_MTU:
> --
> 2.43.0
