[PATCH 1/3] of/fdt: fix misleading elfcorehdr reservation success message

[Sang-Heon Jeon <ekffu200098@gmail.com>]

fdt_reserve_elfcorehdr() does not check the return value of
memblock_reserve(), so a success message is falsely printed when the
reservation fails.

Check the return value and warn on failure instead.

Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
---
 drivers/of/fdt.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 26f66046cc32..d985c07d7c5c 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -479,7 +479,10 @@ static void __init fdt_reserve_elfcorehdr(void)
 		return;
 	}
 
-	memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
+	if (memblock_reserve(elfcorehdr_addr, elfcorehdr_size)) {
+		pr_warn("Failed to reserve memory for elfcorehdr\n");
+		return;
+	}
 
 	pr_info("Reserving %llu KiB of memory at 0x%llx for elfcorehdr\n",
 		elfcorehdr_size >> 10, elfcorehdr_addr);
-- 
2.43.0