From: Jim Garlick <garlick@llnl.gov>
Date: Tue, 3 Jan 2012 21:27:50 +0000 (-0600)
Subject: fs/9p: check schedule_timeout_interruptible return value
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=a0ea787b027b79cf2e01c6758e5246db06520158;p=linux-beck.git

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>
---

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 */