[PATCH] pstore/dump: solution pstore data abort.

[Li Pengcheng]

If not return,data abort will happen
when two threads call pstore_dump at the same time.

Signed-off-by: Liu Hailong <liuhailo...@huawei.com>
Signed-off-by: Li Pengcheng <lipengche...@huawei.com>
Signed-off-by: Li Zhong <lizhon...@hisilicon.com>
---
 fs/pstore/platform.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 14984d9..60e6db6 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -493,6 +493,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
                if (!is_locked) {
                        pr_err("pstore dump routine blocked in %s path, may 
corrupt error record\n"
                                       , in_nmi() ? "NMI" : why);
+                       return;
                }
        } else {
                spin_lock_irqsave(&psinfo->buf_lock, flags);
-- 
1.9.1