net/mlx5: Collect command failures data only for known commands

commit 2a0a935fb64ee8af253b9c6133bb6702fb152ac2 upstream.

DEVX can issue a general command, which is not used by mlx5 driver.
In case such command is failed, mlx5 is trying to collect the failure
data, However, mlx5 doesn't create a storage for this command, since
mlx5 doesn't use it. This lead to array-index-out-of-bounds error.

Fix it by checking whether the command is known before collecting the
failure data.

Fixes: 34f46ae0d4b3 ("net/mlx5: Add command failures data to debugfs")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index b00e33ed05e9177460260436c560bd37f3817fe8..4d6a94ab1f4147349945bff62ebbf9e99d043366 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -1920,9 +1920,10 @@ static void mlx5_cmd_err_trace(struct mlx5_core_dev *dev, u16 opcode, u16 op_mod
 static void cmd_status_log(struct mlx5_core_dev *dev, u16 opcode, u8 status,
                           u32 syndrome, int err)
 {
+       const char *namep = mlx5_command_str(opcode);
        struct mlx5_cmd_stats *stats;
 
-       if (!err)
+       if (!err || !(strcmp(namep, "unknown command opcode")))
                return;
 
        stats = &dev->cmd.stats[opcode];