[PATCH v21 1/5] kdump: return -ENOENT if required cmdline option does not exist

Zhen Lei
2022-02-27T03:08:03Z

The crashkernel=Y,low is an optional command-line option. When it doesn't
exist, kernel will try to allocate minimum required memory below 4G
automatically. Give it a unique error code to distinguish it from other
error scenarios.

Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
---
kernel/crash_core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/crash_core.c b/kernel/crash_core.c
index 256cf6db573cd09..4d57c03714f4e13 100644
--- a/kernel/crash_core.c
+++ b/kernel/crash_core.c
@@ -243,9 +243,8 @@ static int __init __parse_crashkernel(char *cmdline,
*crash_base = 0;

ck_cmdline = get_last_crashkernel(cmdline, name, suffix);
-
if (!ck_cmdline)
- return -EINVAL;
+ return -ENOENT;

ck_cmdline += strlen(name);

--
2.25.1