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.

Fixes: f4892c6 ("powerpc/fadump: allocate memory for additional parameters early")
Reviewed-by: Hari Bathini <[email protected]>
Signed-off-by: Sourabh Jain <[email protected]>
Fixes: f4892c6 ("powerpc/fadump: allocate memory for additional  parameters early")
Signed-off-by: Madhavan Srinivasan <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: sourabhjains

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;