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authorChristoph Hellwig <hch@lst.de>2008-02-08 04:20:27 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:34 -0800
commit9261303ab7589cda6a3b95f9f80c9063538dc335 (patch)
tree03a46d0bb81dd0d0e56f3f3d73a15a42e698076a /fs/libfs.c
parent8b88b0998e35d239e74446cc30f354bdab86df89 (diff)
downloadlwn-9261303ab7589cda6a3b95f9f80c9063538dc335.tar.gz
lwn-9261303ab7589cda6a3b95f9f80c9063538dc335.zip
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>
Diffstat (limited to 'fs/libfs.c')
-rw-r--r--fs/libfs.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index 2319415ddb5e..d6de56a6e183 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))