netdev - [PATCH net-next 2/2] mlxsw: spectrum: Only require minimum firmware version

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Date:   Thu,  9 Jan 2020 21:27:22 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jiri@...lanox.com, mlxsw@...lanox.com,
        Ido Schimmel <idosch@...lanox.com>
Subject: [PATCH net-next 2/2] mlxsw: spectrum: Only require minimum firmware version

From: Ido Schimmel <idosch@...lanox.com>

Currently, the driver ensures that the firmware version found on the
device matches the branch of the required version.

Remove this limitation so that the driver will accept the required
version or a newer version, from any branch.

This will allow us to reduce the frequency in which we need to update
the required version. New firmware versions that include necessary bug
fixes will be able to work with the driver, even if they are not from
the required branch.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Acked-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index 38d16042e7a8..2f0b516ee03f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -45,8 +45,6 @@
 #include "spectrum_ptp.h"
 #include "../mlxfw/mlxfw.h"
 
-#define MLXSW_SP_FWREV_MINOR_TO_BRANCH(minor) ((minor) / 100)
-
 #define MLXSW_SP1_FWREV_MAJOR 13
 #define MLXSW_SP1_FWREV_MINOR 2000
 #define MLXSW_SP1_FWREV_SUBMINOR 2714
@@ -423,13 +421,12 @@ static int mlxsw_sp_fw_rev_validate(struct mlxsw_sp *mlxsw_sp)
 		     rev->major, req_rev->major);
 		return -EINVAL;
 	}
-	if (MLXSW_SP_FWREV_MINOR_TO_BRANCH(rev->minor) ==
-	    MLXSW_SP_FWREV_MINOR_TO_BRANCH(req_rev->minor) &&
-	    mlxsw_core_fw_rev_minor_subminor_validate(rev, req_rev))
+	if (mlxsw_core_fw_rev_minor_subminor_validate(rev, req_rev))
 		return 0;
 
-	dev_info(mlxsw_sp->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver\n",
-		 rev->major, rev->minor, rev->subminor);
+	dev_err(mlxsw_sp->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n",
+		rev->major, rev->minor, rev->subminor, req_rev->major,
+		req_rev->minor, req_rev->subminor);
 	dev_info(mlxsw_sp->bus_info->dev, "Flashing firmware using file %s\n",
 		 fw_filename);
 
-- 
2.24.1