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libfs: make simple attributes interruptible

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Use mutex_lock_interruptible in simple_attr_read/write.

Signed-off-by: Christoph Hellwig <[email protected]>
Cc: <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Greg KH <[email protected]>
Cc: Al Viro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Hellwig 2008-02-08 04:20:27 -08:00 • committed by Linus Torvalds
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))