proc tty: switch synclink to ->proc_fops

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 39 insertions, 59 deletions

diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c
index 0057a8f58cb1..afd0b26ca056 100644
--- a/drivers/char/synclink.c
+++ b/drivers/char/synclink.c
@@ -79,6 +79,7 @@
 #include <linux/ptrace.h>
 #include <linux/ioport.h>
 #include <linux/mm.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/netdevice.h>
@@ -3459,18 +3460,17 @@ cleanup:
  * /proc fs routines....
  */
 
-static inline int line_info(char *buf, struct mgsl_struct *info)
+static inline void line_info(struct seq_file *m, struct mgsl_struct *info)
 {
         char    stat_buf[30];
-        int     ret;
         unsigned long flags;
 
         if (info->bus_type == MGSL_BUS_TYPE_PCI) {
-                ret = sprintf(buf, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
+                seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X",
                         info->device_name, info->io_base, info->irq_level,
                         info->phys_memory_base, info->phys_lcr_base);
         } else {
-                ret = sprintf(buf, "%s:(E)ISA io:%04X irq:%d dma:%d",
+                seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d",
                         info->device_name, info->io_base, 
                         info->irq_level, info->dma_level);
         }
@@ -3497,37 +3497,37 @@ static inline int line_info(char *buf, struct mgsl_struct *info)
 
         if (info->params.mode == MGSL_MODE_HDLC ||
             info->params.mode == MGSL_MODE_RAW ) {
-                ret += sprintf(buf+ret, " HDLC txok:%d rxok:%d",
+                seq_printf(m, " HDLC txok:%d rxok:%d",
                               info->icount.txok, info->icount.rxok);
                 if (info->icount.txunder)
-                        ret += sprintf(buf+ret, " txunder:%d", info->icount.txunder);
+                        seq_printf(m, " txunder:%d", info->icount.txunder);
                 if (info->icount.txabort)
-                        ret += sprintf(buf+ret, " txabort:%d", info->icount.txabort);
+                        seq_printf(m, " txabort:%d", info->icount.txabort);
                 if (info->icount.rxshort)
-                        ret += sprintf(buf+ret, " rxshort:%d", info->icount.rxshort);   
+                        seq_printf(m, " rxshort:%d", info->icount.rxshort);
                 if (info->icount.rxlong)
-                        ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxlong);
+                        seq_printf(m, " rxlong:%d", info->icount.rxlong);
                 if (info->icount.rxover)
-                        ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
+                        seq_printf(m, " rxover:%d", info->icount.rxover);
                 if (info->icount.rxcrc)
-                        ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
+                        seq_printf(m, " rxcrc:%d", info->icount.rxcrc);
         } else {
-                ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
+                seq_printf(m, " ASYNC tx:%d rx:%d",
                               info->icount.tx, info->icount.rx);
                 if (info->icount.frame)
-                        ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
+                        seq_printf(m, " fe:%d", info->icount.frame);
                 if (info->icount.parity)
-                        ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
+                        seq_printf(m, " pe:%d", info->icount.parity);
                 if (info->icount.brk)
-                        ret += sprintf(buf+ret, " brk:%d", info->icount.brk);   
+                        seq_printf(m, " brk:%d", info->icount.brk);
                 if (info->icount.overrun)
-                        ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
+                        seq_printf(m, " oe:%d", info->icount.overrun);
         }
         
         /* Append serial signal status to end */
-        ret += sprintf(buf+ret, " %s\n", stat_buf+1);
+        seq_printf(m, " %s\n", stat_buf+1);
         
-        ret += sprintf(buf+ret, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
+        seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n",
          info->tx_active,info->bh_requested,info->bh_running,
          info->pending_bh);
          
@@ -3544,60 +3544,40 @@ static inline int line_info(char *buf, struct mgsl_struct *info)
         u16 Tmr = usc_InReg( info, TMR );
         u16 Tccr = usc_InReg( info, TCCR );
         u16 Ccar = inw( info->io_base + CCAR );
-        ret += sprintf(buf+ret, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
+        seq_printf(m, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n"
                         "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n",
                         Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar );
         }
         spin_unlock_irqrestore(&info->irq_spinlock,flags);
-        
-        return ret;
-        
-}       /* end of line_info() */
+}
 
-/* mgsl_read_proc()
- * 
- * Called to print information about devices
- * 
- * Arguments:
- *      page    page of memory to hold returned info
- *      start   
- *      off
- *      count
- *      eof
- *      data
- *      
- * Return Value:
- */
-static int mgsl_read_proc(char *page, char **start, off_t off, int count,
-                 int *eof, void *data)
+/* Called to print information about devices */
+static int mgsl_proc_show(struct seq_file *m, void *v)
 {
-        int len = 0, l;
-        off_t   begin = 0;
         struct mgsl_struct *info;
         
-        len += sprintf(page, "synclink driver:%s\n", driver_version);
+        seq_printf(m, "synclink driver:%s\n", driver_version);
         
         info = mgsl_device_list;
         while( info ) {
-                l = line_info(page + len, info);
-                len += l;
-                if (len+begin > off+count)
-                        goto done;
-                if (len+begin < off) {
-                        begin += len;
-                        len = 0;
-                }
+                line_info(m, info);
                 info = info->next_device;
         }
+        return 0;
+}
 
-        *eof = 1;
-done:
-        if (off >= len+begin)
-                return 0;
-        *start = page + (off-begin);
-        return ((count < begin+len-off) ? count : begin+len-off);
-        
-}       /* end of mgsl_read_proc() */
+static int mgsl_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, mgsl_proc_show, NULL);
+}
+
+static const struct file_operations mgsl_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = mgsl_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
 
 /* mgsl_allocate_dma_buffers()
  * 
@@ -4335,13 +4315,13 @@ static const struct tty_operations mgsl_ops = {
         .send_xchar = mgsl_send_xchar,
         .break_ctl = mgsl_break,
         .wait_until_sent = mgsl_wait_until_sent,
-        .read_proc = mgsl_read_proc,
         .set_termios = mgsl_set_termios,
         .stop = mgsl_stop,
         .start = mgsl_start,
         .hangup = mgsl_hangup,
         .tiocmget = tiocmget,
         .tiocmset = tiocmset,
+        .proc_fops = &mgsl_proc_fops,
 };
 
 /*