diff options
Diffstat (limited to 'fs/sysfs')
| -rw-r--r-- | fs/sysfs/bin.c | 36 |
1 files changed, 15 insertions, 21 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c index d2142c0..60a4e78 100644 --- a/fs/sysfs/bin.c +++ b/fs/sysfs/bin.c @@ -44,30 +44,12 @@ struct bin_buffer { struct hlist_node list; }; -static int -fill_read(struct file *file, char *buffer, loff_t off, size_t count) +static ssize_t +read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off) { struct sysfs_dirent *attr_sd = file->f_path.dentry->d_fsdata; struct bin_attribute *attr = attr_sd->s_bin_attr.bin_attr; struct kobject *kobj = attr_sd->s_parent->s_dir.kobj; - int rc; - - /* need attr_sd for attr, its parent for kobj */ - if (!sysfs_get_active(attr_sd)) - return -ENODEV; - - rc = -EIO; - if (attr->read) - rc = attr->read(file, kobj, attr, buffer, off, count); - - sysfs_put_active(attr_sd); - - return rc; -} - -static ssize_t -read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off) -{ struct bin_buffer *bb = file->private_data; int size = file_inode(file)->i_size; loff_t offs = *off; @@ -88,8 +70,20 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off) if (!buf) return -ENOMEM; + /* need attr_sd for attr, its parent for kobj */ mutex_lock(&bb->mutex); - count = fill_read(file, buf, offs, count); + if (!sysfs_get_active(attr_sd)) { + count = -ENODEV; + mutex_unlock(&bb->mutex); + goto out_free; + } + + if (attr->read) + count = attr->read(file, kobj, attr, buf, offs, count); + else + count = -EIO; + + sysfs_put_active(attr_sd); mutex_unlock(&bb->mutex); if (count < 0) |
