proc: switch /proc/driver/ray_cs/ray_cs to seq_file interface

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Jean Tourrilhes <jt@hpl.hp.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ray_cs.c

@@ -34,6 +34,7 @@
 #include <linux/kernel.h>
 #include <linux/proc_fs.h>
 #include <linux/ptrace.h>
+#include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/timer.h>
@@ -2582,7 +2583,7 @@ static char *nettype[] = {"Adhoc", "Infra "};
 static char *framing[] = {"Encapsulation", "Translation"}
 ;
 /*===========================================================================*/
-static int ray_cs_proc_read(char *buf, char **start, off_t offset, int len)
+static int ray_cs_proc_show(struct seq_file *m, void *v)
 {
 /* Print current values which are not available via other means
  * eg ifconfig 
@@ -2606,83 +2607,93 @@ static int ray_cs_proc_read(char *buf, char **start, off_t offset, int len)
     if (!local)
     	return 0;
 
-    len = 0;
+    seq_puts(m, "Raylink Wireless LAN driver status\n");
-
+    seq_printf(m, "%s\n", rcsid);
-    len += sprintf(buf + len, "Raylink Wireless LAN driver status\n");
-    len += sprintf(buf + len, "%s\n", rcsid);
     /* build 4 does not report version, and field is 0x55 after memtest */
-    len += sprintf(buf + len, "Firmware version     = ");
+    seq_puts(m, "Firmware version     = ");
     if (local->fw_ver == 0x55)
-        len += sprintf(buf + len, "4 - Use dump_cis for more details\n");
+        seq_puts(m, "4 - Use dump_cis for more details\n");
     else
-        len += sprintf(buf + len, "%2d.%02d.%02d\n",
+        seq_printf(m, "%2d.%02d.%02d\n",
                    local->fw_ver, local->fw_bld, local->fw_var);
 
     for (i=0; i<32; i++) c[i] = local->sparm.b5.a_current_ess_id[i];
     c[32] = 0;
-    len += sprintf(buf + len, "%s network ESSID = \"%s\"\n", 
+    seq_printf(m, "%s network ESSID = \"%s\"\n",
                    nettype[local->sparm.b5.a_network_type], c);
 
     p = local->bss_id;
-    len += sprintf(buf + len, "BSSID                = %s\n",
+    seq_printf(m, "BSSID                = %s\n",
                    print_mac(mac, p));
 
-    len += sprintf(buf + len, "Country code         = %d\n", 
+    seq_printf(m, "Country code         = %d\n",
                    local->sparm.b5.a_curr_country_code);
 
     i = local->card_status;
     if (i < 0) i = 10;
     if (i > 16) i = 10;
-    len += sprintf(buf + len, "Card status          = %s\n", card_status[i]);
+    seq_printf(m, "Card status          = %s\n", card_status[i]);
 
-    len += sprintf(buf + len, "Framing mode         = %s\n",framing[translate]);
+    seq_printf(m, "Framing mode         = %s\n",framing[translate]);
 
-    len += sprintf(buf + len, "Last pkt signal lvl  = %d\n", local->last_rsl);
+    seq_printf(m, "Last pkt signal lvl  = %d\n", local->last_rsl);
 
     if (local->beacon_rxed) {
 	/* Pull some fields out of last beacon received */
-	len += sprintf(buf + len, "Beacon Interval      = %d Kus\n", 
+	seq_printf(m, "Beacon Interval      = %d Kus\n",
 		       local->last_bcn.beacon_intvl[0]
 		       + 256 * local->last_bcn.beacon_intvl[1]);
     
     p = local->last_bcn.elements;
     if (p[0] == C_ESSID_ELEMENT_ID) p += p[1] + 2;
     else {
-        len += sprintf(buf + len, "Parse beacon failed at essid element id = %d\n",p[0]);
+        seq_printf(m, "Parse beacon failed at essid element id = %d\n",p[0]);
-        return len;
+        return 0;
     }
 
     if (p[0] == C_SUPPORTED_RATES_ELEMENT_ID) {
-        len += sprintf(buf + len, "Supported rate codes = ");
+        seq_puts(m, "Supported rate codes = ");
         for (i=2; i<p[1] + 2; i++) 
-            len += sprintf(buf + len, "0x%02x ", p[i]);
+            seq_printf(m, "0x%02x ", p[i]);
-        len += sprintf(buf + len, "\n");
+        seq_putc(m, '\n');
         p += p[1] + 2;
     }
     else {
-        len += sprintf(buf + len, "Parse beacon failed at rates element\n");
+        seq_puts(m, "Parse beacon failed at rates element\n");
-        return len;
+        return 0;
     }
 
 	if (p[0] == C_FH_PARAM_SET_ELEMENT_ID) {
 	    pfh = (struct freq_hop_element *)p;
-	    len += sprintf(buf + len, "Hop dwell            = %d Kus\n",
+	    seq_printf(m, "Hop dwell            = %d Kus\n",
 			   pfh->dwell_time[0] + 256 * pfh->dwell_time[1]);
-	    len += sprintf(buf + len, "Hop set              = %d \n", pfh->hop_set);
+	    seq_printf(m, "Hop set              = %d \n", pfh->hop_set);
-	    len += sprintf(buf + len, "Hop pattern          = %d \n", pfh->hop_pattern);
+	    seq_printf(m, "Hop pattern          = %d \n", pfh->hop_pattern);
-	    len += sprintf(buf + len, "Hop index            = %d \n", pfh->hop_index);
+	    seq_printf(m, "Hop index            = %d \n", pfh->hop_index);
 	    p += p[1] + 2;
 	}
 	else {
-	    len += sprintf(buf + len, "Parse beacon failed at FH param element\n");
+	    seq_puts(m, "Parse beacon failed at FH param element\n");
-	    return len;
+	    return 0;
 	}
     } else {
-	len += sprintf(buf + len, "No beacons received\n");
+	seq_puts(m, "No beacons received\n");
     }
-    return len;
+    return 0;
 }
 
+static int ray_cs_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, ray_cs_proc_show, NULL);
+}
+
+static const struct file_operations ray_cs_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= ray_cs_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
 #endif
 /*===========================================================================*/
 static int build_auth_frame(ray_dev_t *local, UCHAR *dest, int auth_type)
@@ -2815,7 +2826,7 @@ static int __init init_ray_cs(void)
 #ifdef CONFIG_PROC_FS
     proc_mkdir("driver/ray_cs", NULL);
 
-    create_proc_info_entry("driver/ray_cs/ray_cs", 0, NULL, &ray_cs_proc_read);
+    proc_create("driver/ray_cs/ray_cs", 0, NULL, &ray_cs_proc_fops);
     raycs_write("driver/ray_cs/essid", write_essid, NULL);
     raycs_write("driver/ray_cs/net_type", write_int, &net_type);
     raycs_write("driver/ray_cs/translate", write_int, &translate);