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/hysdn/hycapi.c b/drivers/isdn/hysdn/hycapi.c
index 4ffaa14..fe874af 100644
--- a/drivers/isdn/hysdn/hycapi.c
+++ b/drivers/isdn/hysdn/hycapi.c
@@ -11,6 +11,8 @@
*/
#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/signal.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
@@ -432,26 +434,16 @@
return retval;
}
-/*********************************************************************
-hycapi_read_proc
-
-Informations provided in the /proc/capi-entries.
-
-*********************************************************************/
-
-static int hycapi_read_proc(char *page, char **start, off_t off,
- int count, int *eof, struct capi_ctr *ctrl)
+static int hycapi_proc_show(struct seq_file *m, void *v)
{
+ struct capi_ctr *ctrl = m->private;
hycapictrl_info *cinfo = (hycapictrl_info *)(ctrl->driverdata);
hysdn_card *card = cinfo->card;
- int len = 0;
char *s;
-#ifdef HYCAPI_PRINTFNAMES
- printk(KERN_NOTICE "hycapi_read_proc\n");
-#endif
- len += sprintf(page+len, "%-16s %s\n", "name", cinfo->cardname);
- len += sprintf(page+len, "%-16s 0x%x\n", "io", card->iobase);
- len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
+
+ seq_printf(m, "%-16s %s\n", "name", cinfo->cardname);
+ seq_printf(m, "%-16s 0x%x\n", "io", card->iobase);
+ seq_printf(m, "%-16s %d\n", "irq", card->irq);
switch (card->brdtype) {
case BD_PCCARD: s = "HYSDN Hycard"; break;
@@ -461,24 +453,32 @@
case BD_PLEXUS: s = "HYSDN Plexus30"; break;
default: s = "???"; break;
}
- len += sprintf(page+len, "%-16s %s\n", "type", s);
+ seq_printf(m, "%-16s %s\n", "type", s);
if ((s = cinfo->version[VER_DRIVER]) != NULL)
- len += sprintf(page+len, "%-16s %s\n", "ver_driver", s);
+ seq_printf(m, "%-16s %s\n", "ver_driver", s);
if ((s = cinfo->version[VER_CARDTYPE]) != NULL)
- len += sprintf(page+len, "%-16s %s\n", "ver_cardtype", s);
+ seq_printf(m, "%-16s %s\n", "ver_cardtype", s);
if ((s = cinfo->version[VER_SERIAL]) != NULL)
- len += sprintf(page+len, "%-16s %s\n", "ver_serial", s);
+ seq_printf(m, "%-16s %s\n", "ver_serial", s);
- len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
+ seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
- 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 hycapi_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, hycapi_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations hycapi_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = hycapi_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
/**************************************************************
hycapi_load_firmware
@@ -774,7 +774,7 @@
ctrl->load_firmware = hycapi_load_firmware;
ctrl->reset_ctr = hycapi_reset_ctr;
ctrl->procinfo = hycapi_procinfo;
- ctrl->ctr_read_proc = hycapi_read_proc;
+ ctrl->proc_fops = &hycapi_proc_fops;
strcpy(ctrl->name, cinfo->cardname);
ctrl->owner = THIS_MODULE;