[PATCH] I8K: convert to seqfile

I8K: Change proc code to use seq_file.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 22 insertions, 42 deletions

diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 81d2f675fb7..1599456bdb6 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -20,13 +20,14 @@
 #include <linux/types.h>
 #include <linux/init.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/dmi.h>
 #include <asm/uaccess.h>
 #include <asm/io.h>
 
 #include <linux/i8k.h>
 
-#define I8K_VERSION             "1.13 14/05/2002"
+#define I8K_VERSION             "1.14 21/02/2005"
 
 #define I8K_SMM_FN_STATUS       0x0025
 #define I8K_SMM_POWER_STATUS    0x0069
@@ -74,13 +75,16 @@ static int power_status;
 module_param(power_status, bool, 0600);
 MODULE_PARM_DESC(power_status, "Report power status in /proc/i8k");
 
-static ssize_t i8k_read(struct file *, char __user *, size_t, loff_t *);
+static int i8k_open_fs(struct inode *inode, struct file *file);
 static int i8k_ioctl(struct inode *, struct file *, unsigned int,
                      unsigned long);
 
 static struct file_operations i8k_fops = {
-        .read = i8k_read,
-        .ioctl = i8k_ioctl,
+        .open           = i8k_open_fs,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+        .ioctl          = i8k_ioctl,
 };
 
 typedef struct {
@@ -400,9 +404,9 @@ static int i8k_ioctl(struct inode *ip, struct file *fp, unsigned int cmd,
 /*
  * Print the information for /proc/i8k.
  */
-static int i8k_get_info(char *buffer, char **start, off_t fpos, int length)
+static int i8k_proc_show(struct seq_file *seq, void *offset)
 {
-        int n, fn_key, cpu_temp, ac_power;
+        int fn_key, cpu_temp, ac_power;
         int left_fan, right_fan, left_speed, right_speed;
 
         cpu_temp        = i8k_get_cpu_temp();                   /* 11100 µs */
@@ -431,42 +435,18 @@ static int i8k_get_info(char *buffer, char **start, off_t fpos, int length)
          * 9)  AC power
          * 10) Fn Key status
          */
-        n = sprintf(buffer, "%s %s %s %d %d %d %d %d %d %d\n",
-                    I8K_PROC_FMT,
-                    bios_version,
-                    dmi_get_system_info(DMI_PRODUCT_SERIAL) ? : "N/A",
-                    cpu_temp,
-                    left_fan, right_fan, left_speed, right_speed,
-                    ac_power, fn_key);
-
-        return n;
+        return seq_printf(seq, "%s %s %s %d %d %d %d %d %d %d\n",
+                          I8K_PROC_FMT,
+                          bios_version,
+                          dmi_get_system_info(DMI_PRODUCT_SERIAL) ? : "N/A",
+                          cpu_temp,
+                          left_fan, right_fan, left_speed, right_speed,
+                          ac_power, fn_key);
 }
 
-static ssize_t i8k_read(struct file *f, char __user * buffer, size_t len,
-                        loff_t * fpos)
+static int i8k_open_fs(struct inode *inode, struct file *file)
 {
-        int n;
-        char info[128];
-
-        n = i8k_get_info(info, NULL, 0, 128);
-        if (n <= 0) {
-                return n;
-        }
-
-        if (*fpos >= n) {
-                return 0;
-        }
-
-        if ((*fpos + len) >= n) {
-                len = n - *fpos;
-        }
-
-        if (copy_to_user(buffer, info, len) != 0) {
-                return -EFAULT;
-        }
-
-        *fpos += len;
-        return len;
+        return single_open(file, i8k_proc_show, NULL);
 }
 
 static struct dmi_system_id __initdata i8k_dmi_table[] = {
@@ -560,10 +540,10 @@ int __init i8k_init(void)
                 return -ENODEV;
 
         /* Register the proc entry */
-        proc_i8k = create_proc_info_entry("i8k", 0, NULL, i8k_get_info);
-        if (!proc_i8k) {
+        proc_i8k = create_proc_entry("i8k", 0, NULL);
+        if (!proc_i8k)
                 return -ENOENT;
-        }
+
         proc_i8k->proc_fops = &i8k_fops;
         proc_i8k->owner = THIS_MODULE;