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/diva_didd.c b/drivers/isdn/hardware/eicon/diva_didd.c
index 993b14c..5d06a74 100644
--- a/drivers/isdn/hardware/eicon/diva_didd.c
+++ b/drivers/isdn/hardware/eicon/diva_didd.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <net/net_namespace.h>
#include "platform.h"
@@ -62,39 +63,41 @@
return rev;
}
-static int
-proc_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+static int divadidd_proc_show(struct seq_file *m, void *v)
{
- int len = 0;
char tmprev[32];
strcpy(tmprev, main_revision);
- len += sprintf(page + len, "%s\n", DRIVERNAME);
- len += sprintf(page + len, "name : %s\n", DRIVERLNAME);
- len += sprintf(page + len, "release : %s\n", DRIVERRELEASE_DIDD);
- len += sprintf(page + len, "build : %s(%s)\n",
+ seq_printf(m, "%s\n", DRIVERNAME);
+ seq_printf(m, "name : %s\n", DRIVERLNAME);
+ seq_printf(m, "release : %s\n", DRIVERRELEASE_DIDD);
+ seq_printf(m, "build : %s(%s)\n",
diva_didd_common_code_build, DIVA_BUILD);
- len += sprintf(page + len, "revision : %s\n", getrev(tmprev));
+ seq_printf(m, "revision : %s\n", getrev(tmprev));
- 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 divadidd_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, divadidd_proc_show, NULL);
+}
+
+static const struct file_operations divadidd_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = divadidd_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
static int DIVA_INIT_FUNCTION create_proc(void)
{
proc_net_eicon = proc_mkdir("eicon", init_net.proc_net);
if (proc_net_eicon) {
- if ((proc_didd =
- create_proc_entry(DRIVERLNAME, S_IFREG | S_IRUGO,
- proc_net_eicon))) {
- proc_didd->read_proc = proc_read;
- }
+ proc_didd = proc_create(DRIVERLNAME, S_IRUGO, proc_net_eicon,
+ &divadidd_proc_fops);
return (1);
}
return (0);