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/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c
index 0e84aaa..124550d 100644
--- a/drivers/isdn/hardware/avm/b1dma.c
+++ b/drivers/isdn/hardware/avm/b1dma.c
@@ -11,6 +11,8 @@
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
@@ -855,21 +857,20 @@
/* ------------------------------------------------------------- */
-int b1dmactl_read_proc(char *page, char **start, off_t off,
- int count, int *eof, struct capi_ctr *ctrl)
+static int b1dmactl_proc_show(struct seq_file *m, void *v)
{
+ struct capi_ctr *ctrl = m->private;
avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
avmcard *card = cinfo->card;
u8 flag;
- int len = 0;
char *s;
u32 txoff, txlen, rxoff, rxlen, csr;
unsigned long flags;
- len += sprintf(page+len, "%-16s %s\n", "name", card->name);
- len += sprintf(page+len, "%-16s 0x%x\n", "io", card->port);
- len += sprintf(page+len, "%-16s %d\n", "irq", card->irq);
- len += sprintf(page+len, "%-16s 0x%lx\n", "membase", card->membase);
+ seq_printf(m, "%-16s %s\n", "name", card->name);
+ seq_printf(m, "%-16s 0x%x\n", "io", card->port);
+ seq_printf(m, "%-16s %d\n", "irq", card->irq);
+ seq_printf(m, "%-16s 0x%lx\n", "membase", card->membase);
switch (card->cardtype) {
case avm_b1isa: s = "B1 ISA"; break;
case avm_b1pci: s = "B1 PCI"; break;
@@ -882,18 +883,18 @@
case avm_c2: s = "C2"; 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);
if (card->cardtype != avm_m1) {
flag = ((u8 *)(ctrl->profile.manu))[3];
if (flag)
- len += sprintf(page+len, "%-16s%s%s%s%s%s%s%s\n",
+ seq_printf(m, "%-16s%s%s%s%s%s%s%s\n",
"protocol",
(flag & 0x01) ? " DSS1" : "",
(flag & 0x02) ? " CT1" : "",
@@ -907,7 +908,7 @@
if (card->cardtype != avm_m1) {
flag = ((u8 *)(ctrl->profile.manu))[5];
if (flag)
- len += sprintf(page+len, "%-16s%s%s%s%s\n",
+ seq_printf(m, "%-16s%s%s%s%s\n",
"linetype",
(flag & 0x01) ? " point to point" : "",
(flag & 0x02) ? " point to multipoint" : "",
@@ -915,7 +916,7 @@
(flag & 0x04) ? " leased line with D-channel" : ""
);
}
- len += sprintf(page+len, "%-16s %s\n", "cardname", cinfo->cardname);
+ seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
spin_lock_irqsave(&card->lock, flags);
@@ -930,27 +931,30 @@
spin_unlock_irqrestore(&card->lock, flags);
- len += sprintf(page+len, "%-16s 0x%lx\n",
- "csr (cached)", (unsigned long)card->csr);
- len += sprintf(page+len, "%-16s 0x%lx\n",
- "csr", (unsigned long)csr);
- len += sprintf(page+len, "%-16s %lu\n",
- "txoff", (unsigned long)txoff);
- len += sprintf(page+len, "%-16s %lu\n",
- "txlen", (unsigned long)txlen);
- len += sprintf(page+len, "%-16s %lu\n",
- "rxoff", (unsigned long)rxoff);
- len += sprintf(page+len, "%-16s %lu\n",
- "rxlen", (unsigned long)rxlen);
+ seq_printf(m, "%-16s 0x%lx\n", "csr (cached)", (unsigned long)card->csr);
+ seq_printf(m, "%-16s 0x%lx\n", "csr", (unsigned long)csr);
+ seq_printf(m, "%-16s %lu\n", "txoff", (unsigned long)txoff);
+ seq_printf(m, "%-16s %lu\n", "txlen", (unsigned long)txlen);
+ seq_printf(m, "%-16s %lu\n", "rxoff", (unsigned long)rxoff);
+ seq_printf(m, "%-16s %lu\n", "rxlen", (unsigned long)rxlen);
- 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 b1dmactl_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, b1dmactl_proc_show, PDE(inode)->data);
+}
+
+const struct file_operations b1dmactl_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = b1dmactl_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+EXPORT_SYMBOL(b1dmactl_proc_fops);
+
/* ------------------------------------------------------------- */
EXPORT_SYMBOL(b1dma_reset);
@@ -963,7 +967,6 @@
EXPORT_SYMBOL(b1dma_register_appl);
EXPORT_SYMBOL(b1dma_release_appl);
EXPORT_SYMBOL(b1dma_send_message);
-EXPORT_SYMBOL(b1dmactl_read_proc);
static int __init b1dma_init(void)
{