From: Moshe Shemesh <moshe@mellanox.com>
Date: Sun, 8 Apr 2018 14:16:48 +0300
Subject: net/mlx5: Fix dump_command mailbox length printed
Patch-mainline: v4.18-rc1
Git-commit: 12b996d16b83414fbbdde37b661cfd0a622f40cf
References: bsc#1046303 FATE#322944

Dump command mailbox length printed was correct only if data_only flag
was set. For the case that data_only flag was clear the offset to stop
printing at was wrong and so the buffer printed was too short.
Changed the print loop to stop according to number of buffers in
mailbox.

Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters")
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/cmd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -720,9 +720,11 @@ static void dump_command(struct mlx5_cor
 	struct mlx5_cmd_msg *msg = input ? ent->in : ent->out;
 	u16 op = MLX5_GET(mbox_in, ent->lay->in, opcode);
 	struct mlx5_cmd_mailbox *next = msg->next;
+	int n = mlx5_calc_cmd_blocks(msg);
 	int data_only;
 	u32 offset = 0;
 	int dump_len;
+	int i;
 
 	data_only = !!(mlx5_core_debug_mask & (1 << MLX5_CMD_DATA));
 
@@ -749,7 +751,7 @@ static void dump_command(struct mlx5_cor
 		offset += sizeof(*ent->lay);
 	}
 
-	while (next && offset < msg->len) {
+	for (i = 0; i < n && next; i++)  {
 		if (data_only) {
 			dump_len = min_t(int, MLX5_CMD_DATA_BLOCK_SIZE, msg->len - offset);
 			dump_buf(next->buf, dump_len, 1, offset);