diff options
| author | Tejun Heo <tj@kernel.org> | 2013-10-01 17:42:04 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-05 17:27:40 -0700 |
| commit | 3ff65d3cb09ee642363bcaf12c6c38670263d93a (patch) | |
| tree | 27b7b3d5e36be401ae301bb889c4e66a2fc9bb76 /fs/sysfs/bin.c | |
| parent | 91270162bf8a86bee756da7e931591d9953cb5a8 (diff) | |
sysfs: collapse fs/sysfs/bin.c::fill_read() into read()
read() is simple enough and fill_read() being in a separate function
doesn't add anything. Let's collapse it into read(). This will make
merging bin file handling with regular file.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs/bin.c')
| -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 d2142c0648e..60a4e787dc4 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) |