If the resource of crashk_res has been released, it is better to clear
crashk_res.start and crashk_res.end. Because 'end = start - 1' is not
reasonable, and in some places the test is based on crashk_res.end, not
resource_size(&crashk_res).
Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
---
kernel/kexec_core.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
index d1ab139dd49035e..bcc86a250ab3bf9 100644
--- a/kernel/kexec_core.c
+++ b/kernel/kexec_core.c
@@ -1137,15 +1137,18 @@ int crash_shrink_memory(unsigned long new_size)
end = start + new_size;
crash_free_reserved_phys_range(end, crashk_res.end);
- if (start == end)
- release_resource(&crashk_res);
-
ram_res->start = end;
ram_res->end = crashk_res.end;
ram_res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
ram_res->name = "System RAM";
- crashk_res.end = end - 1;
+ if (start == end) {
+ release_resource(&crashk_res);
+ crashk_res.start = 0;
+ crashk_res.end = 0;
+ } else {
+ crashk_res.end = end - 1;
+ }
insert_resource(&iomem_resource, ram_res);
--
2.25.1
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