mac80211: add the new 802.11n minstrel rate control implementation (optional, not used by default)

SVN-Revision: 19943

1 files changed, 80 insertions, 0 deletions

diff --git a/package/mac80211/patches/570-minstrel_debugfs_cleanup.patch b/package/mac80211/patches/570-minstrel_debugfs_cleanup.patch
new file mode 100644
index 0000000000..9a13bae70b
--- /dev/null
+++ b/package/mac80211/patches/570-minstrel_debugfs_cleanup.patch
@@ -0,0 +1,80 @@
+--- a/net/mac80211/rc80211_minstrel.h
++++ b/net/mac80211/rc80211_minstrel.h
+@@ -80,6 +80,11 @@ struct minstrel_priv {
+ 	unsigned int lookaround_rate_mrr;
+ };
+ 
++struct minstrel_debugfs_info {
++	size_t len;
++	char buf[];
++};
++
+ void minstrel_add_sta_debugfs(void *priv, void *priv_sta, struct dentry *dir);
+ void minstrel_remove_sta_debugfs(void *priv, void *priv_sta);
+ 
+--- a/net/mac80211/rc80211_minstrel_debugfs.c
++++ b/net/mac80211/rc80211_minstrel_debugfs.c
+@@ -52,21 +52,15 @@
+ #include <net/mac80211.h>
+ #include "rc80211_minstrel.h"
+ 
+-struct minstrel_stats_info {
+-	struct minstrel_sta_info *mi;
+-	char buf[4096];
+-	size_t len;
+-};
+-
+ static int
+ minstrel_stats_open(struct inode *inode, struct file *file)
+ {
+ 	struct minstrel_sta_info *mi = inode->i_private;
+-	struct minstrel_stats_info *ms;
++	struct minstrel_debugfs_info *ms;
+ 	unsigned int i, tp, prob, eprob;
+ 	char *p;
+ 
+-	ms = kmalloc(sizeof(*ms), GFP_KERNEL);
++	ms = kmalloc(sizeof(*ms) + 4096, GFP_KERNEL);
+ 	if (!ms)
+ 		return -ENOMEM;
+ 
+@@ -107,35 +101,18 @@ minstrel_stats_open(struct inode *inode,
+ }
+ 
+ static ssize_t
+-minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *o)
++minstrel_stats_read(struct file *file, char __user *buf, size_t len, loff_t *ppos)
+ {
+-	struct minstrel_stats_info *ms;
+-	char *src;
++	struct minstrel_debugfs_info *ms;
+ 
+ 	ms = file->private_data;
+-	src = ms->buf;
+-
+-	len = min(len, ms->len);
+-	if (len <= *o)
+-		return 0;
+-
+-	src += *o;
+-	len -= *o;
+-	*o += len;
+-
+-	if (copy_to_user(buf, src, len))
+-		return -EFAULT;
+-
+-	return len;
++	return simple_read_from_buffer(buf, len, ppos, ms->buf, ms->len);
+ }
+ 
+ static int
+ minstrel_stats_release(struct inode *inode, struct file *file)
+ {
+-	struct minstrel_stats_info *ms = file->private_data;
+-
+-	kfree(ms);
+-
++	kfree(file->private_data);
+ 	return 0;
+ }
+