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-rw-r--r--package/mac80211/patches/570-minstrel_debugfs_cleanup.patch80
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;
+ }
+