dlt-daemon: fix missing application description

Running "dlt-example-user 'test'",
Check "dlt-control -j localhost", will not get application description:
APID:LOG-

Expected:
APID:LOG- Test Application for Logging

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>

2 files changed, 38 insertions, 0 deletions

diff --git a/meta-oe/recipes-extended/dlt-daemon/dlt-daemon/0001-dlt-daemon.c-fix-wrong-len.patch b/meta-oe/recipes-extended/dlt-daemon/dlt-daemon/0001-dlt-daemon.c-fix-wrong-len.patch
new file mode 100644
index 0000000000..bac7691c32
--- /dev/null
+++ b/meta-oe/recipes-extended/dlt-daemon/dlt-daemon/0001-dlt-daemon.c-fix-wrong-len.patch
@@ -0,0 +1,37 @@
+From 7e94c281563ff0eb67e521cf0a6fc3049f732214 Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Wed, 15 Apr 2026 16:52:19 +0800
+Subject: [PATCH] dlt-daemon.c: fix wrong len
+
+Set len to 0 makes the application description always empty.
+One of the failure case:
+Running "dlt-example-user 'test'",
+Check "dlt-control -j localhost", will not get application description:
+APID:LOG-
+
+Expected:
+APID:LOG- Test Application for Logging
+
+Upstream-Status: Backport [https://github.com/COVESA/dlt-daemon/pull/852]
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+---
+ src/daemon/dlt-daemon.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/daemon/dlt-daemon.c b/src/daemon/dlt-daemon.c
+index 8c318a4..38fe824 100644
+--- a/src/daemon/dlt-daemon.c
++++ b/src/daemon/dlt-daemon.c
+@@ -4110,7 +4110,7 @@ int dlt_daemon_process_user_message_register_application(DltDaemon *daemon,
+             to_remove = (uint32_t) temp;
+         }
+ 
+-        len = 0;
++        len = userapp.description_length;
+ 
+         if (len > DLT_DAEMON_DESCSIZE) {
+             len = DLT_DAEMON_DESCSIZE;
+-- 
+2.34.1
+
diff --git a/meta-oe/recipes-extended/dlt-daemon/dlt-daemon_3.0.0.bb b/meta-oe/recipes-extended/dlt-daemon/dlt-daemon_3.0.0.bb
index 141dce57cd..cbeb8c3703 100644
--- a/meta-oe/recipes-extended/dlt-daemon/dlt-daemon_3.0.0.bb
+++ b/meta-oe/recipes-extended/dlt-daemon/dlt-daemon_3.0.0.bb
@@ -24,6 +24,7 @@ SRC_URI = "git://github.com/COVESA/${BPN}.git;protocol=https;branch=master \
            file://0001-Fix-build-failure-with-glibc-2.43.patch \
            file://0001-CMakeLists.txt-make-CONFIGURATION_FILES_DIR-aligned.patch \
            file://0001-warnings-Fix-clang-generated-warnings.patch \
+           file://0001-dlt-daemon.c-fix-wrong-len.patch \
            "
 SRCREV = "f595ea29d1007ca1c3b2d1fd3a88adf7d3db6320"