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airo: use simple_write_to_buffer

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Simplify write file operation for /proc files by using
simple_write_to_buffer().

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Akinobu Mita 2010-12-25 15:03:58 +09:00 committed by John W. Linville
parent 52671e43db
commit ad9082adfc
1 changed files with 7 additions and 13 deletions
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20
drivers/net/wireless/airo.c
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@ -4652,24 +4652,18 @@ static ssize_t proc_write( struct file *file,
size_t len,
loff_t *offset )
{
loff_t pos = *offset;
ssize_t ret;
struct proc_data *priv = file->private_data;
if (!priv->wbuffer)
return -EINVAL;
if (pos < 0)
return -EINVAL;
if (pos >= priv->maxwritelen)
return 0;
if (len > priv->maxwritelen - pos)
len = priv->maxwritelen - pos;
if (copy_from_user(priv->wbuffer + pos, buffer, len))
return -EFAULT;
if ( pos + len > priv->writelen )
priv->writelen = len + file->f_pos;
*offset = pos + len;
return len;
ret = simple_write_to_buffer(priv->wbuffer, priv->maxwritelen, offset,
buffer, len);
if (ret > 0)
priv->writelen = max_t(int, priv->writelen, *offset);
return ret;
}
static int proc_status_open(struct inode *inode, struct file *file)