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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 2 Dec 2019 14:22:55 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r355288 - head/sys/dev/mlx5/mlx5_core
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Author: kib
Date: Mon Dec  2 14:22:55 2019
New Revision: 355288
URL: https://svnweb.freebsd.org/changeset/base/355288

Log:
  mlx5: Do not try to enable fwdumps if scan space did not responded.
  
  Sponsored by:	Mellanox Technologies
  MFC after:	1 week

Modified:
  head/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c

Modified: head/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c
==============================================================================
--- head/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c	Mon Dec  2 14:21:40 2019	(r355287)
+++ head/sys/dev/mlx5/mlx5_core/mlx5_fwdump.c	Mon Dec  2 14:22:55 2019	(r355288)
@@ -111,6 +111,10 @@ mlx5_fwdump_prep(struct mlx5_core_dev *mdev)
 			sz++;
 		addr = next_addr;
 	}
+	if (sz == 1) {
+		mlx5_core_warn(mdev, "no output from scan space\n");
+		goto unlock_vsc;
+	}
 	mdev->dump_rege = malloc(sz * sizeof(struct mlx5_crspace_regmap),
 	    M_MLX5_DUMP, M_WAITOK | M_ZERO);