From: Ben Pfaff <blp@nicira.com>
Date: Wed, 17 Jun 2009 18:51:55 +0000 (-0700)
Subject: datapath: Make openvswitch_ioctl() have a single point of exit.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e86c8696eb0bc62f4a4ae45df5715cee73533408;hp=330a8abb28a997e8fe2b61cef8f1197d9807afeb;p=openvswitch

datapath: Make openvswitch_ioctl() have a single point of exit.

This makes it easier to insert debug printk() calls in a single place if
necessary, and conforms at least as well with Linux kernel style.
---

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 7299cd17..e545cda0 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -1344,24 +1344,28 @@ static long openvswitch_ioctl(struct file *f, unsigned int cmd,
 	/* Handle commands with special locking requirements up front. */
 	switch (cmd) {
 	case ODP_DP_CREATE:
-		return create_dp(dp_idx, (char __user *)argp);
+		err = create_dp(dp_idx, (char __user *)argp);
+		goto exit;
 
 	case ODP_DP_DESTROY:
-		return destroy_dp(dp_idx);
+		err = destroy_dp(dp_idx);
+		goto exit;
 
 	case ODP_PORT_ADD:
-		return add_port(dp_idx, (struct odp_port __user *)argp);
+		err = add_port(dp_idx, (struct odp_port __user *)argp);
+		goto exit;
 
 	case ODP_PORT_DEL:
 		err = get_user(port_no, (int __user *)argp);
-		if (err)
-			return err;
-		return del_port(dp_idx, port_no);
+		if (!err)
+			err = del_port(dp_idx, port_no);
+		goto exit;
 	}
 
 	dp = get_dp_locked(dp_idx);
+	err = -ENODEV;
 	if (!dp)
-		return -ENODEV;
+		goto exit;
 
 	switch (cmd) {
 	case ODP_DP_STATS:
@@ -1443,6 +1447,7 @@ static long openvswitch_ioctl(struct file *f, unsigned int cmd,
 		break;
 	}
 	mutex_unlock(&dp->mutex);
+exit:
 	return err;
 }