From 9261303ab7589cda6a3b95f9f80c9063538dc335 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 8 Feb 2008 04:20:27 -0800
Subject: [PATCH] libfs: make simple attributes interruptible
Use mutex_lock_interruptible in simple_attr_read/write.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: <stefano.brivio@polimi.it>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg KH <greg@kroah.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
fs/libfs.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/fs/libfs.c b/fs/libfs.c
index 2319415ddb5e9..d6de56a6e1837 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -634,7 +634,10 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
if (!attr->get)
return -EACCES;
- mutex_lock(&attr->mutex);
+ ret = mutex_lock_interruptible(&attr->mutex);
+ if (ret)
+ return ret;
+
if (*ppos) { /* continued read */
size = strlen(attr->get_buf);
} else { /* first read */
@@ -666,7 +669,10 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
if (!attr->set)
return -EACCES;
- mutex_lock(&attr->mutex);
+ ret = mutex_lock_interruptible(&attr->mutex);
+ if (ret)
+ return ret;
+
ret = -EFAULT;
size = min(sizeof(attr->set_buf) - 1, len);
if (copy_from_user(attr->set_buf, buf, size))
--
GitLab