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>

13 files changed, 267 insertions, 260 deletions

diff --git a/drivers/isdn/hardware/avm/avmcard.h b/drivers/isdn/hardware/avm/avmcard.h
index d964f07e4a5..a70e8854461 100644
--- a/drivers/isdn/hardware/avm/avmcard.h
+++ b/drivers/isdn/hardware/avm/avmcard.h
@@ -556,8 +556,7 @@ u16  b1_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
 void b1_parse_version(avmctrl_info *card);
 irqreturn_t b1_interrupt(int interrupt, void *devptr);
 
-int b1ctl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl);
+extern const struct file_operations b1ctl_proc_fops;
 
 avmcard_dmainfo *avmcard_dma_alloc(char *name, struct pci_dev *,
 				   long rsize, long ssize);
@@ -577,7 +576,6 @@ void b1dma_register_appl(struct capi_ctr *ctrl,
 				capi_register_params *rp);
 void b1dma_release_appl(struct capi_ctr *ctrl, u16 appl);
 u16  b1dma_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
-int b1dmactl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl);
+extern const struct file_operations b1dmactl_proc_fops;
 
 #endif /* _AVMCARD_H_ */
diff --git a/drivers/isdn/hardware/avm/b1.c b/drivers/isdn/hardware/avm/b1.c
index a7c0083e78a..c38fa0f4c72 100644
--- a/drivers/isdn/hardware/avm/b1.c
+++ b/drivers/isdn/hardware/avm/b1.c
@@ -12,6 +12,8 @@
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/mm.h>
@@ -634,18 +636,17 @@ irqreturn_t b1_interrupt(int interrupt, void *devptr)
 }
 
 /* ------------------------------------------------------------- */
-int b1ctl_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl)
+static int b1ctl_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;
 
-	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);
+	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);
 	switch (card->cardtype) {
 	case avm_b1isa: s = "B1 ISA"; break;
 	case avm_b1pci: s = "B1 PCI"; break;
@@ -658,20 +659,20 @@ int b1ctl_read_proc(char *page, char **start, off_t off,
 	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 (card->cardtype == avm_t1isa)
-	   len += sprintf(page+len, "%-16s %d\n", "cardnr", card->cardnr);
+		seq_printf(m, "%-16s %d\n", "cardnr", card->cardnr);
 	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" : "",
@@ -685,7 +686,7 @@ int b1ctl_read_proc(char *page, char **start, off_t off,
 	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" : "",
@@ -693,16 +694,25 @@ int b1ctl_read_proc(char *page, char **start, off_t off,
 			(flag & 0x04) ? " leased line with D-channel" : ""
 			);
 	}
-	len += sprintf(page+len, "%-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);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
+
+	return 0;
+}
+
+static int b1ctl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, b1ctl_proc_show, PDE(inode)->data);
 }
 
+const struct file_operations b1ctl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= b1ctl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+EXPORT_SYMBOL(b1ctl_proc_fops);
+
 /* ------------------------------------------------------------- */
 
 #ifdef CONFIG_PCI
@@ -781,8 +791,6 @@ EXPORT_SYMBOL(b1_send_message);
 EXPORT_SYMBOL(b1_parse_version);
 EXPORT_SYMBOL(b1_interrupt);
 
-EXPORT_SYMBOL(b1ctl_read_proc);
-
 static int __init b1_init(void)
 {
 	char *p;
diff --git a/drivers/isdn/hardware/avm/b1dma.c b/drivers/isdn/hardware/avm/b1dma.c
index 0e84aaae43f..124550d0dbf 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 @@ u16 b1dma_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
 
 /* ------------------------------------------------------------- */
 
-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 @@ int b1dmactl_read_proc(char *page, char **start, off_t off,
 	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 @@ int b1dmactl_read_proc(char *page, char **start, off_t off,
 	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 @@ int b1dmactl_read_proc(char *page, char **start, off_t off,
 			(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 @@ int b1dmactl_read_proc(char *page, char **start, off_t off,
 
 	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);
-
-	if (off+count >= len)
-	   *eof = 1;
-	if (len < off)
-           return 0;
-	*start = page + off;
-	return ((count < len-off) ? count : len-off);
+	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);
+
+	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_reset_ctr);
 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)
 {
diff --git a/drivers/isdn/hardware/avm/b1isa.c b/drivers/isdn/hardware/avm/b1isa.c
index 6461a32bc83..ff5390546f9 100644
--- a/drivers/isdn/hardware/avm/b1isa.c
+++ b/drivers/isdn/hardware/avm/b1isa.c
@@ -121,7 +121,7 @@ static int b1isa_probe(struct pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1isa_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/b1pci.c b/drivers/isdn/hardware/avm/b1pci.c
index 5b314a2c404..c97e4315079 100644
--- a/drivers/isdn/hardware/avm/b1pci.c
+++ b/drivers/isdn/hardware/avm/b1pci.c
@@ -112,7 +112,7 @@ static int b1pci_probe(struct capicardparams *p, struct pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pci_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 	cinfo->capi_ctrl.owner         = THIS_MODULE;
 
@@ -251,7 +251,7 @@ static int b1pciv4_probe(struct capicardparams *p, struct pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1dma_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1dma_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pciv4_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1dmactl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1dmactl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/b1pcmcia.c b/drivers/isdn/hardware/avm/b1pcmcia.c
index 7740403b40e..d6391e0afee 100644
--- a/drivers/isdn/hardware/avm/b1pcmcia.c
+++ b/drivers/isdn/hardware/avm/b1pcmcia.c
@@ -108,7 +108,7 @@ static int b1pcmcia_add_card(unsigned int port, unsigned irq,
 	cinfo->capi_ctrl.load_firmware = b1_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = b1pcmcia_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/c4.c b/drivers/isdn/hardware/avm/c4.c
index 6833301a45f..de6e6b31181 100644
--- a/drivers/isdn/hardware/avm/c4.c
+++ b/drivers/isdn/hardware/avm/c4.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>
@@ -1062,19 +1064,18 @@ static char *c4_procinfo(struct capi_ctr *ctrl)
 	return cinfo->infobuf;
 }
 
-static int c4_read_proc(char *page, char **start, off_t off,
-        		int count, int *eof, struct capi_ctr *ctrl)
+static int c4_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;
 
-	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;
@@ -1087,18 +1088,18 @@ static int c4_read_proc(char *page, char **start, off_t off,
 	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" : "",
@@ -1112,7 +1113,7 @@ static int c4_read_proc(char *page, char **start, off_t off,
 	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" : "",
@@ -1120,16 +1121,24 @@ static int c4_read_proc(char *page, char **start, off_t off,
 			(flag & 0x04) ? " leased line with D-channel" : ""
 			);
 	}
-	len += sprintf(page+len, "%-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);
+	seq_printf(m, "%-16s %s\n", "cardname", cinfo->cardname);
+
+	return 0;
 }
 
+static int c4_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, c4_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations c4_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= c4_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /* ------------------------------------------------------------- */
 
 static int c4_add_card(struct capicardparams *p, struct pci_dev *dev,
@@ -1201,7 +1210,7 @@ static int c4_add_card(struct capicardparams *p, struct pci_dev *dev,
 		cinfo->capi_ctrl.load_firmware = c4_load_firmware;
 		cinfo->capi_ctrl.reset_ctr     = c4_reset_ctr;
 		cinfo->capi_ctrl.procinfo      = c4_procinfo;
-		cinfo->capi_ctrl.ctr_read_proc = c4_read_proc;
+		cinfo->capi_ctrl.proc_fops = &c4_proc_fops;
 		strcpy(cinfo->capi_ctrl.name, card->name);
 
 		retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/t1isa.c b/drivers/isdn/hardware/avm/t1isa.c
index 1c53fd49adb..baeeb3c2a3e 100644
--- a/drivers/isdn/hardware/avm/t1isa.c
+++ b/drivers/isdn/hardware/avm/t1isa.c
@@ -429,7 +429,7 @@ static int t1isa_probe(struct pci_dev *pdev, int cardnr)
 	cinfo->capi_ctrl.load_firmware = t1isa_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = t1isa_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = t1isa_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1ctl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/avm/t1pci.c b/drivers/isdn/hardware/avm/t1pci.c
index e6d298d7514..5a3f8309801 100644
--- a/drivers/isdn/hardware/avm/t1pci.c
+++ b/drivers/isdn/hardware/avm/t1pci.c
@@ -119,7 +119,7 @@ static int t1pci_add_card(struct capicardparams *p, struct pci_dev *pdev)
 	cinfo->capi_ctrl.load_firmware = b1dma_load_firmware;
 	cinfo->capi_ctrl.reset_ctr     = b1dma_reset_ctr;
 	cinfo->capi_ctrl.procinfo      = t1pci_procinfo;
-	cinfo->capi_ctrl.ctr_read_proc = b1dmactl_read_proc;
+	cinfo->capi_ctrl.proc_fops = &b1dmactl_proc_fops;
 	strcpy(cinfo->capi_ctrl.name, card->name);
 
 	retval = attach_capi_ctr(&cinfo->capi_ctrl);
diff --git a/drivers/isdn/hardware/eicon/capimain.c b/drivers/isdn/hardware/eicon/capimain.c
index 98fcdfc7ca5..0f073cd7376 100644
--- a/drivers/isdn/hardware/eicon/capimain.c
+++ b/drivers/isdn/hardware/eicon/capimain.c
@@ -13,6 +13,7 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <asm/uaccess.h>
+#include <linux/seq_file.h>
 #include <linux/skbuff.h>
 
 #include "os_capi.h"
@@ -75,25 +76,32 @@ void diva_os_free_message_buffer(diva_os_message_buffer_s * dmb)
 /*
  * proc function for controller info
  */
-static int diva_ctl_read_proc(char *page, char **start, off_t off,
-			      int count, int *eof, struct capi_ctr *ctrl)
+static int diva_ctl_proc_show(struct seq_file *m, void *v)
 {
+	struct capi_ctr *ctrl = m->private;
 	diva_card *card = (diva_card *) ctrl->driverdata;
-	int len = 0;
-
-	len += sprintf(page + len, "%s\n", ctrl->name);
-	len += sprintf(page + len, "Serial No. : %s\n", ctrl->serial);
-	len += sprintf(page + len, "Id         : %d\n", card->Id);
-	len += sprintf(page + len, "Channels   : %d\n", card->d.channels);
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+
+	seq_printf(m, "%s\n", ctrl->name);
+	seq_printf(m, "Serial No. : %s\n", ctrl->serial);
+	seq_printf(m, "Id         : %d\n", card->Id);
+	seq_printf(m, "Channels   : %d\n", card->d.channels);
+
+	return 0;
+}
+
+static int diva_ctl_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, diva_ctl_proc_show, NULL);
 }
 
+static const struct file_operations diva_ctl_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= diva_ctl_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
 /*
  * set additional os settings in capi_ctr struct
  */
@@ -102,7 +110,7 @@ void diva_os_set_controller_struct(struct capi_ctr *ctrl)
 	ctrl->driver_name = DRIVERLNAME;
 	ctrl->load_firmware = NULL;
 	ctrl->reset_ctr = NULL;
-	ctrl->ctr_read_proc = diva_ctl_read_proc;
+	ctrl->proc_fops = &diva_ctl_proc_fops;
 	ctrl->owner = THIS_MODULE;
 }
 
diff --git a/drivers/isdn/hardware/eicon/diva_didd.c b/drivers/isdn/hardware/eicon/diva_didd.c
index 993b14cf177..5d06a743782 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 @@ static char *getrev(const char *revision)
 	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));
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+	seq_printf(m, "revision : %s\n", getrev(tmprev));
+
+	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);
diff --git a/drivers/isdn/hardware/eicon/divasi.c b/drivers/isdn/hardware/eicon/divasi.c
index 69e71ebe784..f577719ab3f 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 @@ static void diva_um_timer_function(unsigned long data);
 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);
-
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+	seq_printf(m, "revision : %s\n", getrev(tmprev));
+	seq_printf(m, "build    : %s\n", DIVA_BUILD);
+	seq_printf(m, "major    : %d\n", major);
+
+	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);
 }
 
diff --git a/drivers/isdn/hardware/eicon/divasproc.c b/drivers/isdn/hardware/eicon/divasproc.c
index 040827288ec..46d44a94262 100644
--- a/drivers/isdn/hardware/eicon/divasproc.c
+++ b/drivers/isdn/hardware/eicon/divasproc.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/poll.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/list.h>
 #include <asm/uaccess.h>
 
@@ -141,14 +142,10 @@ void remove_divas_proc(void)
 	}
 }
 
-/*
-** write group_optimization 
-*/
-static int
-write_grp_opt(struct file *file, const char __user *buffer, unsigned long count,
-	      void *data)
+static ssize_t grp_opt_proc_write(struct file *file, const char __user *buffer,
+				  size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
 	if ((count == 1) || (count == 2)) {
@@ -172,14 +169,10 @@ write_grp_opt(struct file *file, const char __user *buffer, unsigned long count,
 	return (-EINVAL);
 }
 
-/*
-** write dynamic_l1_down
-*/
-static int
-write_d_l1_down(struct file *file, const char __user *buffer, unsigned long count,
-		void *data)
+static ssize_t d_l1_down_proc_write(struct file *file, const char __user *buffer,
+				    size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
 	if ((count == 1) || (count == 2)) {
@@ -203,63 +196,62 @@ write_d_l1_down(struct file *file, const char __user *buffer, unsigned long coun
 	return (-EINVAL);
 }
 
-
-/*
-** read dynamic_l1_down 
-*/
-static int
-read_d_l1_down(char *page, char **start, off_t off, int count, int *eof,
-	       void *data)
+static int d_l1_down_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len += sprintf(page + len, "%s\n",
+	seq_printf(m, "%s\n",
 		       (IoAdapter->capi_cfg.
 			cfg_1 & DIVA_XDI_CAPI_CFG_1_DYNAMIC_L1_ON) ? "1" :
 		       "0");
+	return 0;
+}
 
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+static int d_l1_down_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, d_l1_down_proc_show, PDE(inode)->data);
 }
 
-/*
-** read group_optimization
-*/
-static int
-read_grp_opt(char *page, char **start, off_t off, int count, int *eof,
-	     void *data)
+static const struct file_operations d_l1_down_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= d_l1_down_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= d_l1_down_proc_write,
+};
+
+static int grp_opt_proc_show(struct seq_file *m, void *v)
 {
-	int len = 0;
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len += sprintf(page + len, "%s\n",
+	seq_printf(m, "%s\n",
 		       (IoAdapter->capi_cfg.
 			cfg_1 & DIVA_XDI_CAPI_CFG_1_GROUP_POPTIMIZATION_ON)
 		       ? "1" : "0");
+	return 0;
+}
 
-	if (off + count >= len)
-		*eof = 1;
-	if (len < off)
-		return 0;
-	*start = page + off;
-	return ((count < len - off) ? count : len - off);
+static int grp_opt_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, grp_opt_proc_show, PDE(inode)->data);
 }
 
-/*
-** info write
-*/
-static int
-info_write(struct file *file, const char __user *buffer, unsigned long count,
-	   void *data)
+static const struct file_operations grp_opt_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= grp_opt_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= grp_opt_proc_write,
+};
+
+static ssize_t info_proc_write(struct file *file, const char __user *buffer,
+			       size_t count, loff_t *pos)
 {
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = PDE(file->f_path.dentry->d_inode)->data;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 	char c[4];
 
@@ -277,63 +269,46 @@ info_write(struct file *file, const char __user *buffer, unsigned long count,
 	return (-EINVAL);
 }
 
-/*
-** info read
-*/
-static int
-info_read(char *page, char **start, off_t off, int count, int *eof,
-	  void *data)
+static int info_proc_show(struct seq_file *m, void *v)
 {
 	int i = 0;
-	int len = 0;
 	char *p;
 	char tmpser[16];
-	diva_os_xdi_adapter_t *a = (diva_os_xdi_adapter_t *) data;
+	diva_os_xdi_adapter_t *a = m->private;
 	PISDN_ADAPTER IoAdapter = IoAdapters[a->controller - 1];
 
-	len +=
-	    sprintf(page + len, "Name        : %s\n",
-		    IoAdapter->Properties.Name);
-	len += sprintf(page + len, "DSP state   : %08x\n", a->dsp_mask);
-	len += sprintf(page + len, "Channels    : %02d\n",
-		       IoAdapter->Properties.Channels);
-	len += sprintf(page + len, "E. max/used : %03d/%03d\n",
+	seq_printf(m, "Name        : %s\n", IoAdapter->Properties.Name);
+	seq_printf(m, "DSP state   : %08x\n", a->dsp_mask);
+	seq_printf(m, "Channels    : %02d\n", IoAdapter->Properties.Channels);
+	seq_printf(m, "E. max/used : %03d/%03d\n",
 		       IoAdapter->e_max, IoAdapter->e_count);
 	diva_get_vserial_number(IoAdapter, tmpser);
-	len += sprintf(page + len, "Serial      : %s\n", tmpser);
-	len +=
-	    sprintf(page + len, "IRQ         : %d\n",
-		    IoAdapter->irq_info.irq_nr);
-	len += sprintf(page + len, "CardIndex   : %d\n", a->CardIndex);
-	len += sprintf(page + len, "CardOrdinal : %d\n", a->CardOrdinal);
-	len += sprintf(page + len, "Controller  : %d\n", a->controller);
-	len += sprintf(page + len, "Bus-Type    : %s\n",
+	seq_printf(m, "Serial      : %s\n", tmpser);
+	seq_printf(m, "IRQ         : %d\n", IoAdapter->irq_info.irq_nr);
+	seq_printf(m, "CardIndex   : %d\n", a->CardIndex);
+	seq_printf(m, "CardOrdinal : %d\n", a->CardOrdinal);
+	seq_printf(m, "Controller  : %d\n", a->controller);
+	seq_printf(m, "Bus-Type    : %s\n",
 		       (a->Bus ==
 			DIVAS_XDI_ADAPTER_BUS_ISA) ? "ISA" : "PCI");
-	len += sprintf(page + len, "Port-Name   : %s\n", a->port_name);
+	seq_printf(m, "Port-Name   : %s\n", a->port_name);
 	if (a->Bus == DIVAS_XDI_ADAPTER_BUS_PCI) {
-		len +=
-		    sprintf(page + len, "PCI-bus     : %d\n",
-			    a->resources.pci.bus);
-		len +=
-		    sprintf(page + len, "PCI-func    : %d\n",
-			    a->resources.pci.func);
+		seq_printf(m, "PCI-bus     : %d\n", a->resources.pci.bus);
+		seq_printf(m, "PCI-func    : %d\n", a->resources.pci.func);
 		for (i = 0; i < 8; i++) {
 			if (a->resources.pci.bar[i]) {
-				len +=
-				    sprintf(page + len,
+				seq_printf(m,
 					    "Mem / I/O %d : 0x%x / mapped : 0x%lx",
 					    i, a->resources.pci.bar[i],
 					    (unsigned long) a->resources.
 					    pci.addr[i]);
 				if (a->resources.pci.length[i]) {
-					len +=
-					    sprintf(page + len,
+					seq_printf(m,
 						    " / length : %d",
 						    a->resources.pci.
 						    length[i]);
 				}
-				len += sprintf(page + len, "\n");
+				seq_putc(m, '\n');
 			}
 		}
 	}
@@ -353,16 +328,25 @@ info_read(char *page, char **start, off_t off, int count, int *eof,
 	} else {
 		p = "ready";
 	}
-	len += sprintf(page + len, "State       : %s\n", p);
+	seq_printf(m, "State       : %s\n", p);
 
-	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 info_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, info_proc_show, PDE(inode)->data);
 }
 
+static const struct file_operations info_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= info_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+	.write		= info_proc_write,
+};
+
 /*
 ** adapter proc init/de-init
 */
@@ -380,28 +364,20 @@ int create_adapter_proc(diva_os_xdi_adapter_t * a)
 		return (0);
 	a->proc_adapter_dir = (void *) de;
 
-	if (!(pe =
-	     create_proc_entry(info_proc_name, S_IFREG | S_IRUGO | S_IWUSR, de)))
+	pe = proc_create_data(info_proc_name, S_IRUGO | S_IWUSR, de,
+			      &info_proc_fops, a);
+	if (!pe)
 		return (0);
 	a->proc_info = (void *) pe;
-	pe->write_proc = info_write;
-	pe->read_proc = info_read;
-	pe->data = a;
 
-	if ((pe = create_proc_entry(grp_opt_proc_name,
-			       S_IFREG | S_IRUGO | S_IWUSR, de))) {
+	pe = proc_create_data(grp_opt_proc_name, S_IRUGO | S_IWUSR, de,
+			      &grp_opt_proc_fops, a);
+	if (pe)
 		a->proc_grp_opt = (void *) pe;
-		pe->write_proc = write_grp_opt;
-		pe->read_proc = read_grp_opt;
-		pe->data = a;
-	}
-	if ((pe = create_proc_entry(d_l1_down_proc_name,
-			       S_IFREG | S_IRUGO | S_IWUSR, de))) {
+	pe = proc_create_data(d_l1_down_proc_name, S_IRUGO | S_IWUSR, de,
+			      &d_l1_down_proc_fops, a);
+	if (pe)
 		a->proc_d_l1_down = (void *) pe;
-		pe->write_proc = write_d_l1_down;
-		pe->read_proc = read_d_l1_down;
-		pe->data = a;
-	}
 
 	DBG_TRC(("proc entry %s created", tmp));