patch-2.4.27 linux-2.4.27/drivers/net/wireless/airo.c

• Lines: 72
• Date: 2004-08-07 16:26:05.233370569 -0700
• Orig file: linux-2.4.26/drivers/net/wireless/airo.c
• Orig date: 2004-04-14 06:05:30.000000000 -0700

diff -urN linux-2.4.26/drivers/net/wireless/airo.c linux-2.4.27/drivers/net/wireless/airo.c
@@ -3666,19 +3666,22 @@
 			  size_t len,
 			  loff_t *offset )
 {
-	int i;
-	int pos;
+	loff_t pos = *offset;
 	struct proc_data *priv = (struct proc_data*)file->private_data;
 
-	if( !priv->rbuffer ) return -EINVAL;
+	if (!priv->rbuffer)
+		return -EINVAL;
 
-	pos = *offset;
-	for( i = 0; i+pos < priv->readlen && i < len; i++ ) {
-		if (put_user( priv->rbuffer[i+pos], buffer+i ))
-			return -EFAULT;
-	}
-	*offset += i;
-	return i;
+	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;
 }
 
 /*
@@ -3690,24 +3693,24 @@
 			   size_t len,
 			   loff_t *offset )
 {
-	int i;
-	int pos;
+	loff_t pos = *offset;
 	struct proc_data *priv = (struct proc_data*)file->private_data;
 
-	if ( !priv->wbuffer ) {
+	if (!priv->wbuffer)
 		return -EINVAL;
-	}
-
-	pos = *offset;
 
-	for( i = 0; i + pos <  priv->maxwritelen &&
-		     i < len; i++ ) {
-		if (get_user( priv->wbuffer[i+pos], buffer + i ))
-			return -EFAULT;
-	}
-	if ( i+pos > priv->writelen ) priv->writelen = i+file->f_pos;
-	*offset += i;
-	return i;
+	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 = pos + len;
+	*offset = pos + len;
+	return len;
 }
 
 static int proc_status_open( struct inode *inode, struct file *file ) {