Subject: Re: [PATCH net-next v3 1/2] devlink: pass extack through to devlink_param::get()

From: Saeed Mahameed <[email-masked]>
Date: Fri, 7 Nov 2025 22:29:24 -0800

On 07 Nov 12:43, Daniel Zahka wrote:
>Allow devlink_param::get() handlers to report error messages via
>extack. This function is called in a few different contexts, but not
>all of them will have an valid extack to use.
>
>When devlink_param::get() is called from param_get_doit or
>param_get_dumpit contexts, pass the extack through so that drivers can
>report errors when retrieving param values. devlink_param::get() is
>called from the context of devlink_param_notify(), pass NULL in for
>the extack.
>
>Signed-off-by: Daniel Zahka <[email-masked]>
>---
>
>Notes:
>    v3:
>    - fix warnings about undocumented param in intel ice driver
>
> .../marvell/octeontx2/otx2_cpt_devlink.c      |  6 ++++--
> drivers/net/ethernet/amd/pds_core/core.h      |  3 ++-
> drivers/net/ethernet/amd/pds_core/devlink.c   |  3 ++-
> .../net/ethernet/broadcom/bnxt/bnxt_devlink.c |  6 ++++--
> .../net/ethernet/intel/ice/devlink/devlink.c  | 14 ++++++++++----
> .../marvell/octeontx2/af/rvu_devlink.c        | 15 ++++++++++-----
> .../marvell/octeontx2/nic/otx2_devlink.c      |  6 ++++--
> drivers/net/ethernet/mellanox/mlx4/main.c     |  6 ++++--
> .../net/ethernet/mellanox/mlx5/core/eswitch.c |  3 ++-
> .../mellanox/mlx5/core/eswitch_offloads.c     |  3 ++-
> .../net/ethernet/mellanox/mlx5/core/fs_core.c |  3 ++-
> .../ethernet/mellanox/mlx5/core/fw_reset.c    |  3 ++-
> .../mellanox/mlx5/core/lib/nv_param.c         |  9 ++++++---
> .../mellanox/mlxsw/spectrum_acl_tcam.c        |  3 ++-
> .../ethernet/netronome/nfp/devlink_param.c    |  3 ++-
> drivers/net/ethernet/qlogic/qed/qed_devlink.c |  3 ++-
> .../net/ethernet/stmicro/stmmac/stmmac_main.c |  3 ++-
> drivers/net/ethernet/ti/am65-cpsw-nuss.c      |  3 ++-
> drivers/net/ethernet/ti/cpsw_new.c            |  6 ++++--
> drivers/net/wwan/iosm/iosm_ipc_devlink.c      |  3 ++-
> include/net/devlink.h                         |  3 ++-
> include/net/dsa.h                             |  3 ++-
> net/devlink/param.c                           | 19 +++++++++++--------
> net/dsa/devlink.c                             |  3 ++-
> 24 files changed, 87 insertions(+), 45 deletions(-)
>
>diff --git a/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c b/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
>index 215a1a8ba7e9..07a74f702c3a 100644
>--- a/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
>+++ b/drivers/crypto/marvell/octeontx2/otx2_cpt_devlink.c
>@@ -24,7 +24,8 @@ static int otx2_cpt_dl_egrp_delete(struct devlink *dl, u32 id,
> }
>
> static int otx2_cpt_dl_uc_info(struct devlink *dl, u32 id,
>-			       struct devlink_param_gset_ctx *ctx)
>+			       struct devlink_param_gset_ctx *ctx,
>+			       struct netlink_ext_ack *extack)
> {
> 	ctx->val.vstr[0] = '\0';
>
>@@ -32,7 +33,8 @@ static int otx2_cpt_dl_uc_info(struct devlink *dl, u32 id,
> }
>
> static int otx2_cpt_dl_t106_mode_get(struct devlink *dl, u32 id,
>-				     struct devlink_param_gset_ctx *ctx)
>+				     struct devlink_param_gset_ctx *ctx,
>+				     struct netlink_ext_ack *extack)
> {
> 	struct otx2_cpt_devlink *cpt_dl = devlink_priv(dl);
> 	struct otx2_cptpf_dev *cptpf = cpt_dl->cptpf;
>diff --git a/drivers/net/ethernet/amd/pds_core/core.h b/drivers/net/ethernet/amd/pds_core/core.h
>index 0b53a1fab46d..4a6b35c84dab 100644
>--- a/drivers/net/ethernet/amd/pds_core/core.h
>+++ b/drivers/net/ethernet/amd/pds_core/core.h
>@@ -255,7 +255,8 @@ int pdsc_dl_flash_update(struct devlink *dl,
> 			 struct devlink_flash_update_params *params,
> 			 struct netlink_ext_ack *extack);
> int pdsc_dl_enable_get(struct devlink *dl, u32 id,
>-		       struct devlink_param_gset_ctx *ctx);
>+		       struct devlink_param_gset_ctx *ctx,
>+		       struct netlink_ext_ack *extack);
> int pdsc_dl_enable_set(struct devlink *dl, u32 id,
> 		       struct devlink_param_gset_ctx *ctx,
> 		       struct netlink_ext_ack *extack);
>diff --git a/drivers/net/ethernet/amd/pds_core/devlink.c b/drivers/net/ethernet/amd/pds_core/devlink.c
>index d8dc39da4161..b576be626a29 100644
>--- a/drivers/net/ethernet/amd/pds_core/devlink.c
>+++ b/drivers/net/ethernet/amd/pds_core/devlink.c
>@@ -22,7 +22,8 @@ pdsc_viftype *pdsc_dl_find_viftype_by_id(struct pdsc *pdsc,
> }
>
> int pdsc_dl_enable_get(struct devlink *dl, u32 id,
>-		       struct devlink_param_gset_ctx *ctx)
>+		       struct devlink_param_gset_ctx *ctx,
>+		       struct netlink_ext_ack *extack)
> {
> 	struct pdsc *pdsc = devlink_priv(dl);
> 	struct pdsc_viftype *vt_entry;
>diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
>index 67ca02d84c97..15de802bbac4 100644
>--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
>+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_devlink.c
>@@ -1086,7 +1086,8 @@ static int bnxt_hwrm_nvm_req(struct bnxt *bp, u32 param_id, void *msg,
> }
>
> static int bnxt_dl_nvm_param_get(struct devlink *dl, u32 id,
>-				 struct devlink_param_gset_ctx *ctx)
>+				 struct devlink_param_gset_ctx *ctx,
>+				 struct netlink_ext_ack *extack)
> {
> 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
> 	struct hwrm_nvm_get_variable_input *req;
>@@ -1168,7 +1169,8 @@ static int bnxt_dl_msix_validate(struct devlink *dl, u32 id,
> }
>
> static int bnxt_remote_dev_reset_get(struct devlink *dl, u32 id,
>-				     struct devlink_param_gset_ctx *ctx)
>+				     struct devlink_param_gset_ctx *ctx,
>+				     struct netlink_ext_ack *extack)
> {
> 	struct bnxt *bp = bnxt_get_bp_from_dl(dl);
>
>diff --git a/drivers/net/ethernet/intel/ice/devlink/devlink.c b/drivers/net/ethernet/intel/ice/devlink/devlink.c
>index 938914abbe06..d88b7f3fd1f9 100644
>--- a/drivers/net/ethernet/intel/ice/devlink/devlink.c
>+++ b/drivers/net/ethernet/intel/ice/devlink/devlink.c
>@@ -610,11 +610,13 @@ static int ice_update_tx_topo_user_sel(struct ice_pf *pf, int layers)
>  * @devlink: pointer to the devlink instance
>  * @id: the parameter ID to set
>  * @ctx: context to store the parameter value
>+ * @extack: netlink extended ACK structure
>  *
>  * Return: zero on success and negative value on failure.
>  */
> static int ice_devlink_tx_sched_layers_get(struct devlink *devlink, u32 id,
>-					   struct devlink_param_gset_ctx *ctx)
>+					   struct devlink_param_gset_ctx *ctx,
>+					   struct netlink_ext_ack *extack)
> {
> 	struct ice_pf *pf = devlink_priv(devlink);
> 	int err;
>@@ -1349,7 +1351,8 @@ static const struct devlink_ops ice_sf_devlink_ops;
>
> static int
> ice_devlink_enable_roce_get(struct devlink *devlink, u32 id,
>-			    struct devlink_param_gset_ctx *ctx)
>+			    struct devlink_param_gset_ctx *ctx,
>+			    struct netlink_ext_ack *extack)
> {
> 	struct ice_pf *pf = devlink_priv(devlink);
> 	struct iidc_rdma_core_dev_info *cdev;
>@@ -1415,7 +1418,8 @@ ice_devlink_enable_roce_validate(struct devlink *devlink, u32 id,
>
> static int
> ice_devlink_enable_iw_get(struct devlink *devlink, u32 id,
>-			  struct devlink_param_gset_ctx *ctx)
>+			  struct devlink_param_gset_ctx *ctx,
>+			  struct netlink_ext_ack *extack)
> {
> 	struct ice_pf *pf = devlink_priv(devlink);
> 	struct iidc_rdma_core_dev_info *cdev;
>@@ -1522,11 +1526,13 @@ static int ice_devlink_local_fwd_str_to_mode(const char *mode_str)
>  * @devlink: Pointer to the devlink instance.
>  * @id: The parameter ID to set.
>  * @ctx: Context to store the parameter value.
>+ * @extack: netlink extended ACK structure
>  *
>  * Return: Zero.
>  */
> static int ice_devlink_local_fwd_get(struct devlink *devlink, u32 id,
>-				     struct devlink_param_gset_ctx *ctx)
>+				     struct devlink_param_gset_ctx *ctx,
>+				     struct netlink_ext_ack *extack)
> {
> 	struct ice_pf *pf = devlink_priv(devlink);
> 	struct ice_port_info *pi;
>diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
>index 3735372539bd..0f9953eaf1b0 100644
>--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
>+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
>@@ -1233,7 +1233,8 @@ static int rvu_af_dl_dwrr_mtu_set(struct devlink *devlink, u32 id,
> }
>
> static int rvu_af_dl_dwrr_mtu_get(struct devlink *devlink, u32 id,
>-				  struct devlink_param_gset_ctx *ctx)
>+				  struct devlink_param_gset_ctx *ctx,
>+				  struct netlink_ext_ack *extack)
> {
> 	struct rvu_devlink *rvu_dl = devlink_priv(devlink);
> 	struct rvu *rvu = rvu_dl->rvu;
>@@ -1259,7 +1260,8 @@ enum rvu_af_dl_param_id {
> };
>
> static int rvu_af_npc_exact_feature_get(struct devlink *devlink, u32 id,
>-					struct devlink_param_gset_ctx *ctx)
>+					struct devlink_param_gset_ctx *ctx,
>+					struct netlink_ext_ack *extack)
> {
> 	struct rvu_devlink *rvu_dl = devlink_priv(devlink);
> 	struct rvu *rvu = rvu_dl->rvu;
>@@ -1314,7 +1316,8 @@ static int rvu_af_npc_exact_feature_validate(struct devlink *devlink, u32 id,
> }
>
> static int rvu_af_dl_npc_mcam_high_zone_percent_get(struct devlink *devlink, u32 id,
>-						    struct devlink_param_gset_ctx *ctx)
>+						    struct devlink_param_gset_ctx *ctx,
>+						    struct netlink_ext_ack *extack)
> {
> 	struct rvu_devlink *rvu_dl = devlink_priv(devlink);
> 	struct rvu *rvu = rvu_dl->rvu;
>@@ -1376,7 +1379,8 @@ static int rvu_af_dl_npc_mcam_high_zone_percent_validate(struct devlink *devlink
> }
>
> static int rvu_af_dl_npc_def_rule_cntr_get(struct devlink *devlink, u32 id,
>-					   struct devlink_param_gset_ctx *ctx)
>+					   struct devlink_param_gset_ctx *ctx,
>+					   struct netlink_ext_ack *extack)
> {
> 	struct rvu_devlink *rvu_dl = devlink_priv(devlink);
> 	struct rvu *rvu = rvu_dl->rvu;
>@@ -1402,7 +1406,8 @@ static int rvu_af_dl_npc_def_rule_cntr_set(struct devlink *devlink, u32 id,
> }
>
> static int rvu_af_dl_nix_maxlf_get(struct devlink *devlink, u32 id,
>-				   struct devlink_param_gset_ctx *ctx)
>+				   struct devlink_param_gset_ctx *ctx,
>+				   struct netlink_ext_ack *extack)
> {
> 	struct rvu_devlink *rvu_dl = devlink_priv(devlink);
> 	struct rvu *rvu = rvu_dl->rvu;
>diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>index e13ae5484c19..a72694219df4 100644
>--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
>@@ -48,7 +48,8 @@ static int otx2_dl_mcam_count_set(struct devlink *devlink, u32 id,
> }
>
> static int otx2_dl_mcam_count_get(struct devlink *devlink, u32 id,
>-				  struct devlink_param_gset_ctx *ctx)
>+				  struct devlink_param_gset_ctx *ctx,
>+				  struct netlink_ext_ack *extack)
> {
> 	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
> 	struct otx2_nic *pfvf = otx2_dl->pfvf;
>@@ -84,7 +85,8 @@ static int otx2_dl_ucast_flt_cnt_set(struct devlink *devlink, u32 id,
> }
>
> static int otx2_dl_ucast_flt_cnt_get(struct devlink *devlink, u32 id,
>-				     struct devlink_param_gset_ctx *ctx)
>+				     struct devlink_param_gset_ctx *ctx,
>+				     struct netlink_ext_ack *extack)
> {
> 	struct otx2_devlink *otx2_dl = devlink_priv(devlink);
> 	struct otx2_nic *pfvf = otx2_dl->pfvf;
>diff --git a/drivers/net/ethernet/mellanox/mlx4/main.c b/drivers/net/ethernet/mellanox/mlx4/main.c
>index 03d2fc7d9b09..2de226951e19 100644
>--- a/drivers/net/ethernet/mellanox/mlx4/main.c
>+++ b/drivers/net/ethernet/mellanox/mlx4/main.c
>@@ -174,7 +174,8 @@ MODULE_PARM_DESC(port_type_array, "Array of port types: HW_DEFAULT (0) is defaul
> static atomic_t pf_loading = ATOMIC_INIT(0);
>
> static int mlx4_devlink_ierr_reset_get(struct devlink *devlink, u32 id,
>-				       struct devlink_param_gset_ctx *ctx)
>+				       struct devlink_param_gset_ctx *ctx,
>+				       struct netlink_ext_ack *extack)
> {
> 	ctx->val.vbool = !!mlx4_internal_err_reset;
> 	return 0;
>@@ -189,7 +190,8 @@ static int mlx4_devlink_ierr_reset_set(struct devlink *devlink, u32 id,
> }
>
> static int mlx4_devlink_crdump_snapshot_get(struct devlink *devlink, u32 id,
>-					    struct devlink_param_gset_ctx *ctx)
>+					    struct devlink_param_gset_ctx *ctx,
>+					    struct netlink_ext_ack *extack)
> {
> 	struct mlx4_priv *priv = devlink_priv(devlink);
> 	struct mlx4_dev *dev = &priv->dev;
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
>index e2ffb87b94cb..308429175bb2 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
>@@ -1978,7 +1978,8 @@ static int mlx5_devlink_esw_multiport_set(struct devlink *devlink, u32 id,
> }
>
> static int mlx5_devlink_esw_multiport_get(struct devlink *devlink, u32 id,
>-					  struct devlink_param_gset_ctx *ctx)
>+					  struct devlink_param_gset_ctx *ctx,
>+					  struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
>
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
>index 4092ea29c630..a4dd1239514f 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
>@@ -2492,7 +2492,8 @@ static int esw_port_metadata_set(struct devlink *devlink, u32 id,
> }
>
> static int esw_port_metadata_get(struct devlink *devlink, u32 id,
>-				 struct devlink_param_gset_ctx *ctx)
>+				 struct devlink_param_gset_ctx *ctx,
>+				 struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
>
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
>index 2db3ffb0a2b2..88dc2023fca5 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c
>@@ -3774,7 +3774,8 @@ static int mlx5_fs_mode_set(struct devlink *devlink, u32 id,
> }
>
> static int mlx5_fs_mode_get(struct devlink *devlink, u32 id,
>-			    struct devlink_param_gset_ctx *ctx)
>+			    struct devlink_param_gset_ctx *ctx,
>+			    struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
>
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
>index 89e399606877..2bceb42c98cc 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/fw_reset.c
>@@ -73,7 +73,8 @@ static int mlx5_fw_reset_enable_remote_dev_reset_set(struct devlink *devlink, u3
> }
>
> static int mlx5_fw_reset_enable_remote_dev_reset_get(struct devlink *devlink, u32 id,
>-						     struct devlink_param_gset_ctx *ctx)
>+						     struct devlink_param_gset_ctx *ctx,
>+						     struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
> 	struct mlx5_fw_reset *fw_reset;
>diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/nv_param.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/nv_param.c
>index f0ab5ef95fc2..3d2195338d39 100644
>--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/nv_param.c
>+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/nv_param.c
>@@ -200,7 +200,8 @@ static const char *const
>
> static int
> mlx5_nv_param_devlink_cqe_compress_get(struct devlink *devlink, u32 id,
>-				       struct devlink_param_gset_ctx *ctx)
>+				       struct devlink_param_gset_ctx *ctx,
>+				       struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
> 	u32 mnvda[MLX5_ST_SZ_DW(mnvda_reg)] = {};
>@@ -302,7 +303,8 @@ static int mlx5_nv_param_read_per_host_pf_conf(struct mlx5_core_dev *dev,
> }
>
> static int mlx5_devlink_enable_sriov_get(struct devlink *devlink, u32 id,
>-					 struct devlink_param_gset_ctx *ctx)
>+					 struct devlink_param_gset_ctx *ctx,
>+					 struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
> 	u32 mnvda[MLX5_ST_SZ_DW(mnvda_reg)] = {};
>@@ -413,7 +415,8 @@ static int mlx5_devlink_enable_sriov_set(struct devlink *devlink, u32 id,
> }
>
> static int mlx5_devlink_total_vfs_get(struct devlink *devlink, u32 id,
>-				      struct devlink_param_gset_ctx *ctx)
>+				      struct devlink_param_gset_ctx *ctx,
>+				      struct netlink_ext_ack *extack)
> {
> 	struct mlx5_core_dev *dev = devlink_priv(devlink);
> 	u32 mnvda[MLX5_ST_SZ_DW(mnvda_reg)] = {};
>diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
>index b1d08e958bf9..69f9da9fb305 100644
>--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
>+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_tcam.c
>@@ -1489,7 +1489,8 @@ mlxsw_sp_acl_tcam_vregion_rehash(struct mlxsw_sp *mlxsw_sp,
>
> static int
> mlxsw_sp_acl_tcam_region_rehash_intrvl_get(struct devlink *devlink, u32 id,
>-					   struct devlink_param_gset_ctx *ctx)
>+					   struct devlink_param_gset_ctx *ctx,
>+					   struct netlink_ext_ack *extack)
> {
> 	struct mlxsw_core *mlxsw_core = devlink_priv(devlink);
> 	struct mlxsw_sp_acl_tcam *tcam;
>diff --git a/drivers/net/ethernet/netronome/nfp/devlink_param.c b/drivers/net/ethernet/netronome/nfp/devlink_param.c
>index 0e1a3800f371..85e3b19e6165 100644
>--- a/drivers/net/ethernet/netronome/nfp/devlink_param.c
>+++ b/drivers/net/ethernet/netronome/nfp/devlink_param.c
>@@ -81,7 +81,8 @@ static const struct nfp_devlink_param_u8_arg nfp_devlink_u8_args[] = {
>
> static int
> nfp_devlink_param_u8_get(struct devlink *devlink, u32 id,
>-			 struct devlink_param_gset_ctx *ctx)
>+			 struct devlink_param_gset_ctx *ctx,
>+			 struct netlink_ext_ack *extack)
> {
> 	const struct nfp_devlink_param_u8_arg *arg;
> 	struct nfp_pf *pf = devlink_priv(devlink);
>diff --git a/drivers/net/ethernet/qlogic/qed/qed_devlink.c b/drivers/net/ethernet/qlogic/qed/qed_devlink.c
>index 94c5689b5abd..0c5278c0598c 100644
>--- a/drivers/net/ethernet/qlogic/qed/qed_devlink.c
>+++ b/drivers/net/ethernet/qlogic/qed/qed_devlink.c
>@@ -121,7 +121,8 @@ void qed_fw_reporters_destroy(struct devlink *devlink)
> }
>
> static int qed_dl_param_get(struct devlink *dl, u32 id,
>-			    struct devlink_param_gset_ctx *ctx)
>+			    struct devlink_param_gset_ctx *ctx,
>+			    struct netlink_ext_ack *extack)
> {
> 	struct qed_devlink *qed_dl = devlink_priv(dl);
> 	struct qed_dev *cdev;
>diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>index ccf383b355e7..e46d443b9da1 100644
>--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
>@@ -7488,7 +7488,8 @@ static int stmmac_dl_ts_coarse_set(struct devlink *dl, u32 id,
> }
>
> static int stmmac_dl_ts_coarse_get(struct devlink *dl, u32 id,
>-				   struct devlink_param_gset_ctx *ctx)
>+				   struct devlink_param_gset_ctx *ctx,
>+				   struct netlink_ext_ack *extack)
> {
> 	struct stmmac_devlink_priv *dl_priv = devlink_priv(dl);
> 	struct stmmac_priv *priv = dl_priv->stmmac_priv;
>diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>index d5f358ec9820..5924db6be3fe 100644
>--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
>@@ -3068,7 +3068,8 @@ static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common)
> }
>
> static int am65_cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
>-					struct devlink_param_gset_ctx *ctx)
>+					struct devlink_param_gset_ctx *ctx,
>+					struct netlink_ext_ack *extack)
> {
> 	struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
> 	struct am65_cpsw_common *common = dl_priv->common;
>diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
>index 8b9e2078c602..ab88d4c02cbd 100644
>--- a/drivers/net/ethernet/ti/cpsw_new.c
>+++ b/drivers/net/ethernet/ti/cpsw_new.c
>@@ -1618,7 +1618,8 @@ static const struct devlink_ops cpsw_devlink_ops = {
> };
>
> static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
>-				   struct devlink_param_gset_ctx *ctx)
>+				   struct devlink_param_gset_ctx *ctx,
>+				   struct netlink_ext_ack *extack)
> {
> 	struct cpsw_devlink *dl_priv = devlink_priv(dl);
> 	struct cpsw_common *cpsw = dl_priv->cpsw;
>@@ -1753,7 +1754,8 @@ static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
> }
>
> static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id,
>-				struct devlink_param_gset_ctx *ctx)
>+				struct devlink_param_gset_ctx *ctx,
>+				struct netlink_ext_ack *extack)
> {
> 	struct cpsw_devlink *dl_priv = devlink_priv(dl);
> 	struct cpsw_common *cpsw = dl_priv->cpsw;
>diff --git a/drivers/net/wwan/iosm/iosm_ipc_devlink.c b/drivers/net/wwan/iosm/iosm_ipc_devlink.c
>index 33d6342124bc..301a9d294d30 100644
>--- a/drivers/net/wwan/iosm/iosm_ipc_devlink.c
>+++ b/drivers/net/wwan/iosm/iosm_ipc_devlink.c
>@@ -21,7 +21,8 @@ static struct iosm_coredump_file_info list[IOSM_NOF_CD_REGION] = {
>
> /* Get the param values for the specific param ID's */
> static int ipc_devlink_get_param(struct devlink *dl, u32 id,
>-				 struct devlink_param_gset_ctx *ctx)
>+				 struct devlink_param_gset_ctx *ctx,
>+				 struct netlink_ext_ack *extack)
> {
> 	struct iosm_devlink *ipc_devlink = devlink_priv(dl);
>
>diff --git a/include/net/devlink.h b/include/net/devlink.h
>index 9e824f61e40f..6d942597d07d 100644
>--- a/include/net/devlink.h
>+++ b/include/net/devlink.h
>@@ -490,7 +490,8 @@ struct devlink_param {
> 	enum devlink_param_type type;
> 	unsigned long supported_cmodes;
> 	int (*get)(struct devlink *devlink, u32 id,
>-		   struct devlink_param_gset_ctx *ctx);
>+		   struct devlink_param_gset_ctx *ctx,
>+		   struct netlink_ext_ack *extack);
> 	int (*set)(struct devlink *devlink, u32 id,
> 		   struct devlink_param_gset_ctx *ctx,
> 		   struct netlink_ext_ack *extack);
>diff --git a/include/net/dsa.h b/include/net/dsa.h
>index 2df2e2ead9a8..85c1b938f2c4 100644
>--- a/include/net/dsa.h
>+++ b/include/net/dsa.h
>@@ -1251,7 +1251,8 @@ struct dsa_switch_ops {
> 			     dsa_devlink_param_get, dsa_devlink_param_set, NULL)
>
> int dsa_devlink_param_get(struct devlink *dl, u32 id,
>-			  struct devlink_param_gset_ctx *ctx);
>+			  struct devlink_param_gset_ctx *ctx,
>+			  struct netlink_ext_ack *extack);
> int dsa_devlink_param_set(struct devlink *dl, u32 id,
> 			  struct devlink_param_gset_ctx *ctx,
> 			  struct netlink_ext_ack *extack);
>diff --git a/net/devlink/param.c b/net/devlink/param.c
>index 70e69523412c..8bae3f733bde 100644
>--- a/net/devlink/param.c
>+++ b/net/devlink/param.c
>@@ -169,11 +169,12 @@ devlink_param_cmode_is_supported(const struct devlink_param *param,
>
> static int devlink_param_get(struct devlink *devlink,
> 			     const struct devlink_param *param,
>-			     struct devlink_param_gset_ctx *ctx)
>+			     struct devlink_param_gset_ctx *ctx,
>+			     struct netlink_ext_ack *extack)
> {
> 	if (!param->get)
> 		return -EOPNOTSUPP;
>-	return param->get(devlink, param->id, ctx);
>+	return param->get(devlink, param->id, ctx, extack);
> }
>
> static int devlink_param_set(struct devlink *devlink,
>@@ -245,7 +246,8 @@ static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
> 				 unsigned int port_index,
> 				 struct devlink_param_item *param_item,
> 				 enum devlink_command cmd,
>-				 u32 portid, u32 seq, int flags)
>+				 u32 portid, u32 seq, int flags,
>+				 struct netlink_ext_ack *extack)

Too many params, I miss David Miller, I think he said once "if you write a function with more
than 5 parameters, you are not my friend".

Anyway I can't think of a creative way to solve this, so LGTM overall.

Reviewed-by: Saeed Mahameed <[email-masked]>

> {
> 	union devlink_param_value param_value[DEVLINK_PARAM_CMODE_MAX + 1];
> 	bool param_value_set[DEVLINK_PARAM_CMODE_MAX + 1] = {};
>@@ -270,7 +272,7 @@ static int devlink_nl_param_fill(struct sk_buff *msg, struct devlink *devlink,
> 				return -EOPNOTSUPP;
> 		} else {
> 			ctx.cmode = i;
>-			err = devlink_param_get(devlink, param, &ctx);
>+			err = devlink_param_get(devlink, param, &ctx, extack);
> 			if (err)
> 				return err;
> 			param_value[i] = ctx.val;
>@@ -352,7 +354,7 @@ static void devlink_param_notify(struct devlink *devlink,
> 	if (!msg)
> 		return;
> 	err = devlink_nl_param_fill(msg, devlink, port_index, param_item, cmd,
>-				    0, 0, 0);
>+				    0, 0, 0, NULL);
> 	if (err) {
> 		nlmsg_free(msg);
> 		return;
>@@ -395,7 +397,8 @@ static int devlink_nl_param_get_dump_one(struct sk_buff *msg,
> 		err = devlink_nl_param_fill(msg, devlink, 0, param_item,
> 					    DEVLINK_CMD_PARAM_GET,
> 					    NETLINK_CB(cb->skb).portid,
>-					    cb->nlh->nlmsg_seq, flags);
>+					    cb->nlh->nlmsg_seq, flags,
>+					    cb->extack);
> 		if (err == -EOPNOTSUPP) {
> 			err = 0;
> 		} else if (err) {
>@@ -504,8 +507,8 @@ int devlink_nl_param_get_doit(struct sk_buff *skb,
> 		return -ENOMEM;
>
> 	err = devlink_nl_param_fill(msg, devlink, 0, param_item,
>-				    DEVLINK_CMD_PARAM_GET,
>-				    info->snd_portid, info->snd_seq, 0);
>+				    DEVLINK_CMD_PARAM_GET, info->snd_portid,
>+				    info->snd_seq, 0, info->extack);
> 	if (err) {
> 		nlmsg_free(msg);
> 		return err;
>diff --git a/net/dsa/devlink.c b/net/dsa/devlink.c
>index f41f9fc2194e..ed342f345692 100644
>--- a/net/dsa/devlink.c
>+++ b/net/dsa/devlink.c
>@@ -182,7 +182,8 @@ static const struct devlink_ops dsa_devlink_ops = {
> };
>
> int dsa_devlink_param_get(struct devlink *dl, u32 id,
>-			  struct devlink_param_gset_ctx *ctx)
>+			  struct devlink_param_gset_ctx *ctx,
>+			  struct netlink_ext_ack *extack)
> {
> 	struct dsa_switch *ds = dsa_devlink_to_ds(dl);
>
>-- 
>2.47.3
>
>