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Date: Thu, 11 Apr 2013 14:28:02 +0100
From: David Howells <dhowells@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: devel@...verdev.osuosl.org,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Andrea Merello <andreamrl@...cali.it>,
linux-wireless@...r.kernel.org,
YAMANE Toshiaki <yamanetoshi@...il.com>,
Bill Pemberton <wfp5p@...ginia.edu>,
Maxim Mikityanskiy <maxtram95@...il.com>,
viro@...IV.linux.org.uk
Subject: [PATCH 03/26] rtl8187se: Don't use create_proc_read_entry() [RFC]
Don't use create_proc_read_entry() as that is deprecated, but rather use
proc_create_data() and seq_file instead. Whilst we're at it, reduce the
number of show functions where we can share them.
Question: Do any of the registers read by proc_get_registers() have side
effects upon reading? If so, locking will be required.
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
cc: Maxim Mikityanskiy <maxtram95@...il.com>
cc: YAMANE Toshiaki <yamanetoshi@...il.com>
cc: Bill Pemberton <wfp5p@...ginia.edu>
cc: Andrea Merello <andreamrl@...cali.it>
cc: linux-wireless@...r.kernel.org
cc: devel@...verdev.osuosl.org
---
drivers/staging/rtl8187se/r8180_core.c | 135 +++++++++++++++-----------------
1 file changed, 64 insertions(+), 71 deletions(-)
diff --git a/drivers/staging/rtl8187se/r8180_core.c b/drivers/staging/rtl8187se/r8180_core.c
index d10d75e..a9bc82b 100644
--- a/drivers/staging/rtl8187se/r8180_core.c
+++ b/drivers/staging/rtl8187se/r8180_core.c
@@ -36,6 +36,8 @@
#include <linux/syscalls.h>
#include <linux/eeprom_93cx6.h>
#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include "r8180_hw.h"
#include "r8180.h"
@@ -204,51 +206,35 @@ void rtl8180_start_tx_beacon(struct net_device *dev);
static struct proc_dir_entry *rtl8180_proc;
-static int proc_get_registers(char *page, char **start,
- off_t offset, int count,
- int *eof, void *data)
+static int proc_get_registers(struct seq_file *m, void *v)
{
- struct net_device *dev = data;
- int len = 0;
- int i, n;
- int max = 0xff;
+ struct net_device *dev = m->private;
+ int i, n, max = 0xff;
/* This dump the current register page */
for (n = 0; n <= max;) {
- len += snprintf(page + len, count - len, "\nD: %2x > ", n);
+ seq_printf(m, "\nD: %2x > ", n);
for (i = 0; i < 16 && n <= max; i++, n++)
- len += snprintf(page + len, count - len, "%2x ",
- read_nic_byte(dev, n));
+ seq_printf(m, "%2x ", read_nic_byte(dev, n));
}
- len += snprintf(page + len, count - len, "\n");
-
- *eof = 1;
- return len;
+ seq_putc(m, '\n');
+ return 0;
}
int get_curr_tx_free_desc(struct net_device *dev, int priority);
-static int proc_get_stats_hw(char *page, char **start,
- off_t offset, int count,
- int *eof, void *data)
+static int proc_get_stats_hw(struct seq_file *m, void *v)
{
- int len = 0;
-
- *eof = 1;
- return len;
+ return 0;
}
-static int proc_get_stats_rx(char *page, char **start,
- off_t offset, int count,
- int *eof, void *data)
+static int proc_get_stats_rx(struct seq_file *m, void *v)
{
- struct net_device *dev = data;
+ struct net_device *dev = m->private;
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
- int len = 0;
-
- len += snprintf(page + len, count - len,
+ seq_printf(m,
"RX OK: %lu\n"
"RX Retry: %lu\n"
"RX CRC Error(0-500): %lu\n"
@@ -263,22 +249,17 @@ static int proc_get_stats_rx(char *page, char **start,
priv->stats.rxicverr
);
- *eof = 1;
- return len;
+ return 0;
}
-static int proc_get_stats_tx(char *page, char **start,
- off_t offset, int count,
- int *eof, void *data)
+static int proc_get_stats_tx(struct seq_file *m, void *v)
{
- struct net_device *dev = data;
+ struct net_device *dev = m->private;
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
-
- int len = 0;
unsigned long totalOK;
totalOK = priv->stats.txnpokint+priv->stats.txhpokint+priv->stats.txlpokint;
- len += snprintf(page + len, count - len,
+ seq_printf(m,
"TX OK: %lu\n"
"TX Error: %lu\n"
"TX Retry: %lu\n"
@@ -291,8 +272,7 @@ static int proc_get_stats_tx(char *page, char **start,
priv->stats.txbeaconerr
);
- *eof = 1;
- return len;
+ return 0;
}
void rtl8180_proc_module_init(void)
@@ -318,9 +298,44 @@ void rtl8180_proc_remove_one(struct net_device *dev)
}
}
+/*
+ * seq_file wrappers for procfile show routines.
+ */
+static int rtl8180_proc_open(struct inode *inode, struct file *file)
+{
+ struct proc_dir_entry *e = PDE(inode);
+ struct net_device *dev = e->parent->data;
+ int (*show)(struct seq_file *, void *) = e->data;
+
+ return single_open(file, show, dev);
+}
+
+static const struct file_operations rtl8180_proc_fops = {
+ .open = rtl8180_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+/*
+ * Table of proc files we need to create.
+ */
+struct rtl8180_proc_file {
+ char name[12];
+ int (*show)(struct seq_file *, void *);
+};
+
+static const struct rtl8180_proc_file rtl8180_proc_files[] = {
+ { "stats-hw", &proc_get_stats_hw },
+ { "stats-rx", &proc_get_stats_rx },
+ { "stats-tx", &proc_get_stats_tx },
+ { "registers", &proc_get_registers },
+ { "" }
+};
+
void rtl8180_proc_init_one(struct net_device *dev)
{
- struct proc_dir_entry *e;
+ const struct rtl8180_proc_file *f;
struct r8180_priv *priv = (struct r8180_priv *)ieee80211_priv(dev);
priv->dir_dev = rtl8180_proc;
@@ -329,38 +344,16 @@ void rtl8180_proc_init_one(struct net_device *dev)
dev->name);
return;
}
+ priv->dir_dev->data = dev;
- e = create_proc_read_entry("stats-hw", S_IFREG | S_IRUGO,
- priv->dir_dev, proc_get_stats_hw, dev);
- if (!e) {
- DMESGE("Unable to initialize "
- "/proc/net/r8180/%s/stats-hw\n",
- dev->name);
- }
-
- e = create_proc_read_entry("stats-rx", S_IFREG | S_IRUGO,
- priv->dir_dev, proc_get_stats_rx, dev);
- if (!e) {
- DMESGE("Unable to initialize "
- "/proc/net/r8180/%s/stats-rx\n",
- dev->name);
- }
-
-
- e = create_proc_read_entry("stats-tx", S_IFREG | S_IRUGO,
- priv->dir_dev, proc_get_stats_tx, dev);
- if (!e) {
- DMESGE("Unable to initialize "
- "/proc/net/r8180/%s/stats-tx\n",
- dev->name);
- }
-
- e = create_proc_read_entry("registers", S_IFREG | S_IRUGO,
- priv->dir_dev, proc_get_registers, dev);
- if (!e) {
- DMESGE("Unable to initialize "
- "/proc/net/r8180/%s/registers\n",
- dev->name);
+ for (f = rtl8180_proc_files; f->name[0]; f++) {
+ if (!proc_create_data(f->name, S_IFREG | S_IRUGO,
+ priv->dir_dev,
+ &rtl8180_proc_fops, f->show)) {
+ DMESGE("Unable to initialize /proc/net/r8180/%s\n",
+ f->name);
+ return;
+ }
}
}
--
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