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| author | Li Zhong <zhong@linux.vnet.ibm.com> | 2014-11-17 05:52:30 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2014-11-19 08:09:13 +0300 |
| commit | a49ab6eeebe5624d51466969a7bac611231eede8 (patch) | |
| tree | 5f907029857ad1aad276376699bbbdfd04f3f6cc /arch | |
| parent | 35891d40bfc4f41fc627abb757c0894c0028f3ab (diff) | |
| download | linux-a49ab6eeebe5624d51466969a7bac611231eede8.tar.xz | |
powerpc/pseries: Initialise nvram_pstore_info's buf_lock
nvram_pstore_info's buf_lock is not initialized before registering,
which is clearly incorrect.
It causes some strange behavior when trying to obtain the lock during
kdump process.
On a UP configuration, the console stopped for a couple of seconds, then
"lockup suspected" warning printed out, but then it continued to run.
So try lock fails, and lockup reported, but then arch_spin_lock()
passes.
Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com>
[mpe: Edited changelog]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/pseries/nvram.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c index 11a3b617ef5d..054a0ed5c7ee 100644 --- a/arch/powerpc/platforms/pseries/nvram.c +++ b/arch/powerpc/platforms/pseries/nvram.c @@ -715,6 +715,8 @@ static int nvram_pstore_init(void) nvram_pstore_info.buf = oops_data; nvram_pstore_info.bufsize = oops_data_sz; + spin_lock_init(&nvram_pstore_info.buf_lock); + rc = pstore_register(&nvram_pstore_info); if (rc != 0) pr_err("nvram: pstore_register() failed, defaults to " |