[PATCH v2] btrfs: return EAGAIN when receiving a pending signal in the defrag loops

[xiakaixu1987]

From: Kaixu Xia <kaixuxia@xxxxxxxxxxx>

The variable ret is overwritten by the following variable defrag_count.
Actually the code should return EAGAIN when receiving a pending signal
in the defrag loops.

Reported-by: Tosk Robot <tencent_os_robot@xxxxxxxxxxx>
Signed-off-by: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
---
v2
 -return EAGAIN instead of remove the EAGAIN error.

 fs/btrfs/ioctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 69a384145dc6..6f13db6d30bd 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1519,7 +1519,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
 		if (btrfs_defrag_cancelled(fs_info)) {
 			btrfs_debug(fs_info, "defrag_file cancelled");
 			ret = -EAGAIN;
-			break;
+			goto out_ra;
 		}
 
 		if (!should_defrag_range(inode, (u64)i << PAGE_SHIFT,
-- 
2.20.0