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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>
This commit is contained in:
Christoph Hellwig 2008-02-08 04:20:27 -08:00 committed by Linus Torvalds
parent 8b88b0998e
commit 9261303ab7
1 changed files with 8 additions and 2 deletions
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10
fs/libfs.c
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@ -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))