proc_fops: convert drivers/isdn/ to seq_file
Convert code away from ->read_proc/->write_proc interfaces. Switch to
proc_create()/proc_create_data() which make addition of proc entries
reliable wrt NULL ->proc_fops, NULL ->data and so on.
Problem with ->read_proc et al is described here commit
786d7e1612f0b0adb6046f19b906609e4fe8b1ba "Fix rmmod/read/write races in
/proc entries"
[akpm@linux-foundation.org: CONFIG_PROC_FS=n build fix]
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: Karsten Keil <keil@b1-systems.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hardware/eicon/divasi.c b/drivers/isdn/hardware/eicon/divasi.c
index 69e71eb..f577719 100644
--- a/drivers/isdn/hardware/eicon/divasi.c
+++ b/drivers/isdn/hardware/eicon/divasi.c
@@ -17,6 +17,7 @@
#include <linux/poll.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
+#include <linux/seq_file.h>
#include <linux/smp_lock.h>
#include <asm/uaccess.h>
@@ -86,39 +87,40 @@
extern struct proc_dir_entry *proc_net_eicon;
static struct proc_dir_entry *um_idi_proc_entry = NULL;
-static int
-um_idi_proc_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int um_idi_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
char tmprev[32];
- len += sprintf(page + len, "%s\n", DRIVERNAME);
- len += sprintf(page + len, "name : %s\n", DRIVERLNAME);
- len += sprintf(page + len, "release : %s\n", DRIVERRELEASE_IDI);
+ seq_printf(m, "%s\n", DRIVERNAME);
+ seq_printf(m, "name : %s\n", DRIVERLNAME);
+ seq_printf(m, "release : %s\n", DRIVERRELEASE_IDI);
strcpy(tmprev, main_revision);
- len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
- len += sprintf(page + len, "build : %s\n", DIVA_BUILD);
- len += sprintf(page + len, "major : %d\n", major);
+ seq_printf(m, "revision : %s\n", getrev(tmprev));
+ seq_printf(m, "build : %s\n", DIVA_BUILD);
+ seq_printf(m, "major : %d\n", major);
- if (off + count >= len)
- *eof = 1;
- if (len < off)
- return 0;
- *start = page + off;
- return ((count < len - off) ? count : len - off);
+ return 0;
}
+static int um_idi_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, um_idi_proc_show, NULL);
+}
+
+static const struct file_operations um_idi_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = um_idi_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static int DIVA_INIT_FUNCTION create_um_idi_proc(void)
{
- um_idi_proc_entry = create_proc_entry(DRIVERLNAME,
- S_IFREG | S_IRUGO | S_IWUSR,
- proc_net_eicon);
+ um_idi_proc_entry = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
+ &um_idi_proc_fops);
if (!um_idi_proc_entry)
return (0);
-
- um_idi_proc_entry->read_proc = um_idi_proc_read;
-
return (1);
}