powerpc/fadump: skip parameter area allocation when fadump is disabled

[Sourabh Jain]

Fadump allocates memory to pass additional kernel command-line argument
to the fadump kernel. However, this allocation is not needed when fadump
is disabled. So avoid allocating memory for the additional parameter
area in such cases.

Cc: Hari Bathini <hbathini at linux.ibm.com>
Cc: Madhavan Srinivasan <maddy at linux.ibm.com>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Signed-off-by: Sourabh Jain <sourabhjain at linux.ibm.com>
---
 arch/powerpc/kernel/fadump.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 5782e743fd27..4ebc333dd786 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1747,6 +1747,9 @@ void __init fadump_setup_param_area(void)
 {
 	phys_addr_t range_start, range_end;
 
+	if (!fw_dump.fadump_enabled)
+		return;
+
 	if (!fw_dump.param_area_supported || fw_dump.dump_active)
 		return;
 
-- 
2.51.0