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

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: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Fixes: f4892c68ecc1 ("powerpc/fadump: allocate memory for additional parameters early")
Reviewed-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Sourabh Jain <redacted>
---

Changelog:

v1 -> v2
 - Added fixes and reviewed-by tag

---
 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