[PATCH 2/2] f2fs: better to wait for fstrim completion

[Jaegeuk Kim]

In android, we'd better wait for fstrim completion instead of issuing the
discard commands asynchronous.

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
 fs/f2fs/segment.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index f96e61e8ddf7..beb15c834a34 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1076,6 +1076,9 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi, bool issue_cond)
 			if (dcc->pend_list_tag[i] & P_TRIM) {
 				__submit_discard_cmd(sbi, dc);
 				issued++;
+
+				if (fatal_signal_pending(current))
+					break;
 				continue;
 			}
 
@@ -1192,7 +1195,7 @@ void stop_discard_thread(struct f2fs_sb_info *sbi)
 	}
 }
 
-/* This comes from f2fs_put_super */
+/* This comes from f2fs_put_super and f2fs_trim_fs */
 void f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
 {
 	__issue_discard_cmd(sbi, false);
@@ -2227,6 +2230,7 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
 	}
 	/* It's time to issue all the filed discards */
 	mark_discard_range_all(sbi);
+	f2fs_wait_discard_bios(sbi);
 out:
 	range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);
 	return err;
-- 
2.14.0.rc1.383.gd1ce394fe2-goog