f2fs: fix to invalidate dcc->f2fs_issue_discard in error path
Commit Message
Otherwise, latter f2fs_stop_discard_thread() may access invalid
dcc->f2fs_issue_discard.
Signed-off-by: Chao Yu <chao@kernel.org>
---
fs/f2fs/segment.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
@@ -2026,8 +2026,10 @@ int f2fs_start_discard_thread(struct f2fs_sb_info *sbi)
dcc->f2fs_issue_discard = kthread_run(issue_discard_thread, sbi,
"f2fs_discard-%u:%u", MAJOR(dev), MINOR(dev));
- if (IS_ERR(dcc->f2fs_issue_discard))
+ if (IS_ERR(dcc->f2fs_issue_discard)) {
err = PTR_ERR(dcc->f2fs_issue_discard);
+ dcc->f2fs_issue_discard = NULL;
+ }
return err;
}