This patch cleans up the debugfs read function for the statistics by
using simple_read_from_buffer instead of its own semi-broken hack.
Also removes a useless member of the minstrel debugfs info struct.
Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
---
--- 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;
}
--
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