fs/9p: check schedule_timeout_interruptible return value

In v9fs_file_do_lock() we need to check return value of
schedule_timeout_interruptible() and exit the loop when it
returns nonzero, otherwise the loop is not really interruptible
and after the signal, the loop is no longer throttled by
P9_LOCK_TIMEOUT.

Signed-off-by: Jim Garlick <garlick.jim@gmail.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 62857a810a79..a7ac45d5bd2c 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -204,7 +204,8 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
                         break;
                 if (status == P9_LOCK_BLOCKED && !IS_SETLKW(cmd))
                         break;
-                schedule_timeout_interruptible(P9_LOCK_TIMEOUT);
+                if (schedule_timeout_interruptible(P9_LOCK_TIMEOUT) != 0)
+                        break;
         }
 
         /* map 9p status to VFS status */