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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>
This commit is contained in:
Tejun Heo 2013-10-01 17:42:04 -04:00 committed by Greg Kroah-Hartman
parent 91270162bf
commit 3ff65d3cb0
1 changed files with 15 additions and 21 deletions
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36
fs/sysfs/bin.c
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@ -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)