[PATCH] fadump: leverage kernel support to re-regisgter FADump

[Hari Bathini]

With kernel commit 0823c68b054b ("powerpc/fadump: re-register firmware-
assisted dump if already registered") support is enabled to re-register
when FADump is alredy registered. Leverage that option in kdump scripts.

Signed-off-by: Hari Bathini 
---
 kdumpctl |   16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/kdumpctl b/kdumpctl
index de6da39..c93c3fa 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -1047,7 +1047,8 @@ reload()
    fi

if [ $DEFAULT_DUMP_MODE == "fadump" ]; then
-		stop_fadump
+		reload_fadump
+		return $?
    else
    	stop_kdump
    fi
@@ -1103,6 +1104,19 @@ stop_kdump()
    return 0
 }

+reload_fadump()
+{
+	start_fadump
+	if [ $? != 0 ]; then
+		# FADump could fail on older kernel where re-register
+		# support is not enabled. Try stop/start from userspace
+		# to handle such scenario.
+		stop_fadump
+		start_fadump
+		return $?
+	fi
+}
+
 stop()
 {
    if [ $DEFAULT_DUMP_MODE == "fadump" ]; then