diff mbox series

[net-next,05/17] mlxsw: spectrum: Allow lane to start from non-zero index

Message ID 20220418064241.2925668-6-idosch@nvidia.com (mailing list archive)
State Accepted
Commit bac62191a3d4dddc4dbfddb4187d4952380c29c7
Delegated to: Netdev Maintainers
Headers show
Series Introduce line card support for modular switch | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count fail Series longer than 15 patches (and no cover letter)
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 6 of 6 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 22 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Ido Schimmel April 18, 2022, 6:42 a.m. UTC 
From: Jiri Pirko <jiri@nvidia.com>

So far, the lane index always started from zero. That is not true for
modular systems with gearbox-equipped linecards. Loose the check so the
lanes can start from non-zero index.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 684910ca7cf4..120880fad7f8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -486,6 +486,7 @@  mlxsw_sp_port_module_info_get(struct mlxsw_sp *mlxsw_sp, u16 local_port,
 {
 	char pmlp_pl[MLXSW_REG_PMLP_LEN];
 	bool separate_rxtx;
+	u8 first_lane;
 	u8 module;
 	u8 width;
 	int err;
@@ -498,6 +499,7 @@  mlxsw_sp_port_module_info_get(struct mlxsw_sp *mlxsw_sp, u16 local_port,
 	module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0);
 	width = mlxsw_reg_pmlp_width_get(pmlp_pl);
 	separate_rxtx = mlxsw_reg_pmlp_rxtx_get(pmlp_pl);
+	first_lane = mlxsw_reg_pmlp_tx_lane_get(pmlp_pl, 0);
 
 	if (width && !is_power_of_2(width)) {
 		dev_err(mlxsw_sp->bus_info->dev, "Port %d: Unsupported module config: width value is not power of 2\n",
@@ -518,7 +520,7 @@  mlxsw_sp_port_module_info_get(struct mlxsw_sp *mlxsw_sp, u16 local_port,
 				local_port);
 			return -EINVAL;
 		}
-		if (mlxsw_reg_pmlp_tx_lane_get(pmlp_pl, i) != i) {
+		if (mlxsw_reg_pmlp_tx_lane_get(pmlp_pl, i) != i + first_lane) {
 			dev_err(mlxsw_sp->bus_info->dev, "Port %d: Unsupported module config: TX and RX lane numbers are not sequential\n",
 				local_port);
 			return -EINVAL;