[PATCH 5.19 137/155] arm64/kexec: Fix missing extra range for crashkres_low.

[Greg Kroah-Hartman]

From: Levi Yun <ppbuk5246@xxxxxxxxx>

commit 4831be702b95047c89b3fa5728d07091e9e9f7c9 upstream.

Like crashk_res, Calling crash_exclude_mem_range function with
crashk_low_res area would need extra crash_mem range too.

Add one more extra cmem slot in case of crashk_low_res is used.

Signed-off-by: Levi Yun <ppbuk5246@xxxxxxxxx>
Fixes: 944a45abfabc ("arm64: kdump: Reimplement crashkernel=X")
Cc: <stable@xxxxxxxxxxxxxxx> # 5.19.x
Acked-by: Baoquan He <bhe@xxxxxxxxxx>
Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Link: https://lore.kernel.org/r/20220831103913.12661-1-ppbuk5246@xxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 arch/arm64/kernel/machine_kexec_file.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm64/kernel/machine_kexec_file.c
+++ b/arch/arm64/kernel/machine_kexec_file.c
@@ -47,7 +47,7 @@ static int prepare_elf_headers(void **ad
 	u64 i;
 	phys_addr_t start, end;
 
-	nr_ranges = 1; /* for exclusion of crashkernel region */
+	nr_ranges = 2; /* for exclusion of crashkernel region */
 	for_each_mem_range(i, &start, &end)
 		nr_ranges++;