linux-kernel - [PATCH v6 57/57] dyndbg: fiddle with readback value on LEVEL

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Date:   Sun,  4 Sep 2022 15:41:34 -0600
From:   Jim Cromie <jim.cromie@...il.com>
To:     jbaron@...mai.com, gregkh@...uxfoundation.org,
        dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Cc:     daniel.vetter@...ll.ch, seanpaul@...omium.org, robdclark@...il.com,
        linux@...musvillemoes.dk, joe@...ches.com,
        Jim Cromie <jim.cromie@...il.com>
Subject: [PATCH v6 57/57] dyndbg: fiddle with readback value on LEVEL_NAMES types

my test scripts were writing one val, reading back val+1

  echo L3 > p_level_names
  cat p_level_names
  L4

fix this w a -1 offset.

Signed-off-by: Jim Cromie <jim.cromie@...il.com>
---
 lib/dynamic_debug.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 11fea1f818a7..7d458601a61b 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -830,6 +830,8 @@ int param_get_dyndbg_classes(char *buffer, const struct kernel_param *kp)
 		return scnprintf(buffer, PAGE_SIZE, "0x%lx\n", *dcp->bits);
 
 	case DD_CLASS_TYPE_LEVEL_NAMES:
+		return scnprintf(buffer, PAGE_SIZE, "%d\n", *dcp->lvl - 1);
+
 	case DD_CLASS_TYPE_LEVEL_NUM:
 		return scnprintf(buffer, PAGE_SIZE, "%d\n", *dcp->lvl);
 	default:
-- 
2.37.2