airo: use simple_read_from_buffer()

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Dan Williams <dcbw@redhat.com>
Cc: Michal Schmidt <mschmidt@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 12 deletions

diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index 1e1446bf4b48..e30f8b79ea89 100644
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -4561,22 +4561,13 @@ static ssize_t proc_read( struct file *file,
                           size_t len,
                           loff_t *offset )
 {
-        loff_t pos = *offset;
-        struct proc_data *priv = (struct proc_data*)file->private_data;
+        struct proc_data *priv = file->private_data;
 
         if (!priv->rbuffer)
                 return -EINVAL;
 
-        if (pos < 0)
-                return -EINVAL;
-        if (pos >= priv->readlen)
-                return 0;
-        if (len > priv->readlen - pos)
-                len = priv->readlen - pos;
-        if (copy_to_user(buffer, priv->rbuffer + pos, len))
-                return -EFAULT;
-        *offset = pos + len;
-        return len;
+        return simple_read_from_buffer(buffer, len, offset, priv->rbuffer,
+                                        priv->readlen);
 }
 
 /*