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| author | Zhen Lei <thunder.leizhen@huawei.com> | 2022-05-06 19:43:57 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2022-05-07 19:54:33 +0100 |
| commit | 2e5920bb073a4e3e69cf8e581836cafc8ba1b464 (patch) | |
| tree | 703c1312ca48a5031c92b7b8765d297f9f7fe531 /kernel | |
| parent | b2d229d4ddb17db541098b83524d901257e93845 (diff) | |
| download | linux-2e5920bb073a4e3e69cf8e581836cafc8ba1b464.tar.bz2 | |
kdump: return -ENOENT if required cmdline option does not exist
According to the current crashkernel=Y,low support in other ARCHes, it's
an optional command-line option. When it doesn't exist, kernel will try
to allocate minimum required memory below 4G automatically.
However, __parse_crashkernel() returns '-EINVAL' for all error cases. It
can't distinguish the nonexistent option from invalid option.
Change __parse_crashkernel() to return '-ENOENT' for the nonexistent option
case. With this change, crashkernel,low memory will take the default
value if crashkernel=,low is not specified; while crashkernel reservation
will fail and bail out if an invalid option is specified.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Acked-by: Baoquan He <bhe@redhat.com>
Link: https://lore.kernel.org/r/20220506114402.365-2-thunder.leizhen@huawei.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/crash_core.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/kernel/crash_core.c b/kernel/crash_core.c index 256cf6db573c..4d57c03714f4 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); |