Merge branch 'fixes' of master.kernel.org:/pub/scm/linux/kernel/git/linville/wireless-2.6

5 files changed, 28 insertions, 9 deletions

diff --git a/net/mac80211/Kconfig b/net/mac80211/Kconfig
index 09c255002e56..e77592d050ce 100644
--- a/net/mac80211/Kconfig
+++ b/net/mac80211/Kconfig
@@ -98,6 +98,18 @@ config MAC80211_DEBUGFS
 
 	  Say N unless you know you need this.
 
+config MAC80211_DEBUG_PACKET_ALIGNMENT
+	bool "Enable packet alignment debugging"
+	depends on MAC80211
+	help
+	  This option is recommended for driver authors and strongly
+	  discouraged for everybody else, it will trigger a warning
+	  when a driver hands mac80211 a buffer that is aligned in
+	  a way that will cause problems with the IP stack on some
+	  architectures.
+
+	  Say N unless you're writing a mac80211 based driver.
+
 config MAC80211_DEBUG
 	bool "Enable debugging output"
 	depends on MAC80211
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c
index 5dcc2d61551f..67b7c75c430d 100644
--- a/net/mac80211/ieee80211.c
+++ b/net/mac80211/ieee80211.c
@@ -1344,17 +1344,17 @@ static int __init ieee80211_init(void)
 
 	ret = rc80211_simple_init();
 	if (ret)
-		goto fail;
+		goto out;
 
 	ret = rc80211_pid_init();
 	if (ret)
-		goto fail_simple;
+		goto out_cleanup_simple;
 
 	ret = ieee80211_wme_register();
 	if (ret) {
 		printk(KERN_DEBUG "ieee80211_init: failed to "
 		       "initialize WME (err=%d)\n", ret);
-		goto fail_pid;
+		goto out_cleanup_pid;
 	}
 
 	ieee80211_debugfs_netdev_init();
@@ -1362,11 +1362,11 @@ static int __init ieee80211_init(void)
 
 	return 0;
 
- fail_pid:
-	rc80211_simple_exit();
- fail_simple:
+ out_cleanup_pid:
 	rc80211_pid_exit();
- fail:
+ out_cleanup_simple:
+	rc80211_simple_exit();
+ out:
 	return ret;
 }
 
diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index 554c4baed6fb..c339571632b2 100644
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -538,7 +538,7 @@ int __init rc80211_pid_init(void)
 	return ieee80211_rate_control_register(&mac80211_rcpid);
 }
 
-void __exit rc80211_pid_exit(void)
+void rc80211_pid_exit(void)
 {
 	ieee80211_rate_control_unregister(&mac80211_rcpid);
 }
diff --git a/net/mac80211/rc80211_simple.c b/net/mac80211/rc80211_simple.c
index 934676d687d6..9a78b116acff 100644
--- a/net/mac80211/rc80211_simple.c
+++ b/net/mac80211/rc80211_simple.c
@@ -389,7 +389,7 @@ int __init rc80211_simple_init(void)
 	return ieee80211_rate_control_register(&mac80211_rcsimple);
 }
 
-void __exit rc80211_simple_exit(void)
+void rc80211_simple_exit(void)
 {
 	ieee80211_rate_control_unregister(&mac80211_rcsimple);
 }
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index d44c87269bcb..535407d07fa4 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -340,11 +340,15 @@ static u32 ieee80211_rx_load_stats(struct ieee80211_local *local,
 	return load;
 }
 
+#ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT
 static ieee80211_txrx_result
 ieee80211_rx_h_verify_ip_alignment(struct ieee80211_txrx_data *rx)
 {
 	int hdrlen;
 
+	if (!WLAN_FC_DATA_PRESENT(rx->fc))
+		return TXRX_CONTINUE;
+
 	/*
 	 * Drivers are required to align the payload data in a way that
 	 * guarantees that the contained IP header is aligned to a four-
@@ -371,11 +375,14 @@ ieee80211_rx_h_verify_ip_alignment(struct ieee80211_txrx_data *rx)
 
 	return TXRX_CONTINUE;
 }
+#endif
 
 ieee80211_rx_handler ieee80211_rx_pre_handlers[] =
 {
 	ieee80211_rx_h_parse_qos,
+#ifdef CONFIG_MAC80211_DEBUG_PACKET_ALIGNMENT
 	ieee80211_rx_h_verify_ip_alignment,
+#endif
 	NULL
 };