[WATCHDOG 51/57] w83877f_wdt: clean up code, coding style, switch to unlocked_ioctl

Review and switch to unlocked_ioctl

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 101 insertions, 98 deletions

diff --git a/drivers/watchdog/w83877f_wdt.c b/drivers/watchdog/w83877f_wdt.c
index f510a3a595e6..75b546d7d8c2 100644
--- a/drivers/watchdog/w83877f_wdt.c
+++ b/drivers/watchdog/w83877f_wdt.c
@@ -23,13 +23,16 @@
  *                            Added KERN_* tags to printks
  *                            add CONFIG_WATCHDOG_NOWAYOUT support
  *                            fix possible wdt_is_open race
- *                            changed watchdog_info to correctly reflect what the driver offers
- *                            added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT,
+ *                            changed watchdog_info to correctly reflect what
+ *                            the driver offers
+ *                            added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS,
+ *                            WDIOC_SETTIMEOUT,
  *                            WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
  *           09/8 - 2003      [wim@iguana.be] cleanup of trailing spaces
  *                            added extra printk's for startup problems
  *                            use module_param
- *                            made timeout (the emulated heartbeat) a module_param
+ *                            made timeout (the emulated heartbeat) a
+ *                            module_param
  *                            made the keepalive ping an internal subroutine
  *
  *  This WDT driver is different from most other Linux WDT
@@ -51,8 +54,8 @@
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/init.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
 #include <asm/system.h>
 
 #define OUR_NAME "w83877f_wdt"
@@ -80,14 +83,19 @@
  */
 
 #define WATCHDOG_TIMEOUT 30            /* 30 sec default timeout */
-static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+/* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
+static int timeout = WATCHDOG_TIMEOUT;
 module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
+MODULE_PARM_DESC(timeout,
+        "Watchdog timeout in seconds. (1<=timeout<=3600, default="
+                                __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
 
 
 static int nowayout = WATCHDOG_NOWAYOUT;
 module_param(nowayout, int, 0);
-MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+MODULE_PARM_DESC(nowayout,
+                "Watchdog cannot be stopped once started (default="
+                                __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
 
 static void wdt_timer_ping(unsigned long);
 static DEFINE_TIMER(timer, wdt_timer_ping, 0, 0);
@@ -105,8 +113,7 @@ static void wdt_timer_ping(unsigned long data)
         /* If we got a heartbeat pulse within the WDT_US_INTERVAL
          * we agree to ping the WDT
          */
-        if(time_before(jiffies, next_heartbeat))
-        {
+        if (time_before(jiffies, next_heartbeat)) {
                 /* Ping the WDT */
                 spin_lock(&wdt_spinlock);
 
@@ -118,9 +125,9 @@ static void wdt_timer_ping(unsigned long data)
 
                 spin_unlock(&wdt_spinlock);
 
-        } else {
-                printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
-        }
+        } else
+                printk(KERN_WARNING PFX
+                        "Heartbeat lost! Will not ping the watchdog\n");
 }
 
 /*
@@ -181,22 +188,21 @@ static void wdt_keepalive(void)
  * /dev/watchdog handling
  */
 
-static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
+static ssize_t fop_write(struct file *file, const char __user *buf,
+                                                size_t count, loff_t *ppos)
 {
         /* See if we got the magic character 'V' and reload the timer */
-        if(count)
-        {
-                if (!nowayout)
-                {
+        if (count) {
+                if (!nowayout) {
                         size_t ofs;
 
-                        /* note: just in case someone wrote the magic character
-                         * five months ago... */
+                        /* note: just in case someone wrote the magic
+                           character five months ago... */
                         wdt_expect_close = 0;
 
-                        /* scan to see whether or not we got the magic character */
-                        for(ofs = 0; ofs != count; ofs++)
-                        {
+                        /* scan to see whether or not we got the
+                           magic character */
+                        for (ofs = 0; ofs != count; ofs++) {
                                 char c;
                                 if (get_user(c, buf + ofs))
                                         return -EFAULT;
@@ -211,10 +217,10 @@ static ssize_t fop_write(struct file * file, const char __user * buf, size_t cou
         return count;
 }
 
-static int fop_open(struct inode * inode, struct file * file)
+static int fop_open(struct inode *inode, struct file *file)
 {
         /* Just in case we're already talking to someone... */
-        if(test_and_set_bit(0, &wdt_is_open))
+        if (test_and_set_bit(0, &wdt_is_open))
                 return -EBUSY;
 
         /* Good, fire up the show */
@@ -222,78 +228,78 @@ static int fop_open(struct inode * inode, struct file * file)
         return nonseekable_open(inode, file);
 }
 
-static int fop_close(struct inode * inode, struct file * file)
+static int fop_close(struct inode *inode, struct file *file)
 {
-        if(wdt_expect_close == 42)
+        if (wdt_expect_close == 42)
                 wdt_turnoff();
         else {
                 del_timer(&timer);
-                printk(KERN_CRIT PFX "device file closed unexpectedly. Will not stop the WDT!\n");
+                printk(KERN_CRIT PFX
+                  "device file closed unexpectedly. Will not stop the WDT!\n");
         }
         clear_bit(0, &wdt_is_open);
         wdt_expect_close = 0;
         return 0;
 }
 
-static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-        unsigned long arg)
+static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
         void __user *argp = (void __user *)arg;
         int __user *p = argp;
-        static struct watchdog_info ident=
-        {
-                .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
+        static const struct watchdog_info ident = {
+                .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
+                                                        | WDIOF_MAGICCLOSE,
                 .firmware_version = 1,
                 .identity = "W83877F",
         };
 
-        switch(cmd)
+        switch (cmd) {
+        default:
+                return -ENOTTY;
+        case WDIOC_GETSUPPORT:
+                return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
+        case WDIOC_GETSTATUS:
+        case WDIOC_GETBOOTSTATUS:
+                return put_user(0, p);
+        case WDIOC_KEEPALIVE:
+                wdt_keepalive();
+                return 0;
+        case WDIOC_SETOPTIONS:
         {
-                default:
-                        return -ENOTTY;
-                case WDIOC_GETSUPPORT:
-                        return copy_to_user(argp, &ident, sizeof(ident))?-EFAULT:0;
-                case WDIOC_GETSTATUS:
-                case WDIOC_GETBOOTSTATUS:
-                        return put_user(0, p);
-                case WDIOC_KEEPALIVE:
-                        wdt_keepalive();
-                        return 0;
-                case WDIOC_SETOPTIONS:
-                {
-                        int new_options, retval = -EINVAL;
-
-                        if(get_user(new_options, p))
-                                return -EFAULT;
-
-                        if(new_options & WDIOS_DISABLECARD) {
-                                wdt_turnoff();
-                                retval = 0;
-                        }
+                int new_options, retval = -EINVAL;
 
-                        if(new_options & WDIOS_ENABLECARD) {
-                                wdt_startup();
-                                retval = 0;
-                        }
+                if (get_user(new_options, p))
+                        return -EFAULT;
 
-                        return retval;
+                if (new_options & WDIOS_DISABLECARD) {
+                        wdt_turnoff();
+                        retval = 0;
                 }
-                case WDIOC_SETTIMEOUT:
-                {
-                        int new_timeout;
 
-                        if(get_user(new_timeout, p))
-                                return -EFAULT;
+                if (new_options & WDIOS_ENABLECARD) {
+                        wdt_startup();
+                        retval = 0;
+                }
 
-                        if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
-                                return -EINVAL;
+                return retval;
+        }
+        case WDIOC_SETTIMEOUT:
+        {
+                int new_timeout;
 
-                        timeout = new_timeout;
-                        wdt_keepalive();
-                        /* Fall through */
-                }
-                case WDIOC_GETTIMEOUT:
-                        return put_user(timeout, p);
+                if (get_user(new_timeout, p))
+                        return -EFAULT;
+
+                /* arbitrary upper limit */
+                if (new_timeout < 1 || new_timeout > 3600)
+                        return -EINVAL;
+
+                timeout = new_timeout;
+                wdt_keepalive();
+                /* Fall through */
+        }
+        case WDIOC_GETTIMEOUT:
+                return put_user(timeout, p);
         }
 }
 
@@ -303,7 +309,7 @@ static const struct file_operations wdt_fops = {
         .write          = fop_write,
         .open           = fop_open,
         .release        = fop_close,
-        .ioctl          = fop_ioctl,
+        .unlocked_ioctl = fop_ioctl,
 };
 
 static struct miscdevice wdt_miscdev = {
@@ -319,7 +325,7 @@ static struct miscdevice wdt_miscdev = {
 static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
         void *unused)
 {
-        if(code==SYS_DOWN || code==SYS_HALT)
+        if (code == SYS_DOWN || code == SYS_HALT)
                 wdt_turnoff();
         return NOTIFY_DONE;
 }
@@ -329,8 +335,7 @@ static int wdt_notify_sys(struct notifier_block *this, unsigned long code,
  *      turn the timebomb registers off.
  */
 
-static struct notifier_block wdt_notifier=
-{
+static struct notifier_block wdt_notifier = {
         .notifier_call = wdt_notify_sys,
 };
 
@@ -342,31 +347,29 @@ static void __exit w83877f_wdt_unload(void)
         misc_deregister(&wdt_miscdev);
 
         unregister_reboot_notifier(&wdt_notifier);
-        release_region(WDT_PING,1);
-        release_region(ENABLE_W83877F_PORT,2);
+        release_region(WDT_PING, 1);
+        release_region(ENABLE_W83877F_PORT, 2);
 }
 
 static int __init w83877f_wdt_init(void)
 {
         int rc = -EBUSY;
 
-        if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
-        {
+        if (timeout < 1 || timeout > 3600) { /* arbitrary upper limit */
                 timeout = WATCHDOG_TIMEOUT;
-                printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
-                        timeout);
+                printk(KERN_INFO PFX
+                        "timeout value must be 1 <= x <= 3600, using %d\n",
+                                                        timeout);
         }
 
-        if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT"))
-        {
+        if (!request_region(ENABLE_W83877F_PORT, 2, "W83877F WDT")) {
                 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
                         ENABLE_W83877F_PORT);
                 rc = -EIO;
                 goto err_out;
         }
 
-        if (!request_region(WDT_PING, 1, "W8387FF WDT"))
-        {
+        if (!request_region(WDT_PING, 1, "W8387FF WDT")) {
                 printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
                         WDT_PING);
                 rc = -EIO;
@@ -374,22 +377,22 @@ static int __init w83877f_wdt_init(void)
         }
 
         rc = register_reboot_notifier(&wdt_notifier);
-        if (rc)
-        {
-                printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
-                        rc);
+        if (rc) {
+                printk(KERN_ERR PFX
+                        "cannot register reboot notifier (err=%d)\n", rc);
                 goto err_out_region2;
         }
 
         rc = misc_register(&wdt_miscdev);
-        if (rc)
-        {
-                printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
-                        wdt_miscdev.minor, rc);
+        if (rc) {
+                printk(KERN_ERR PFX
+                        "cannot register miscdev on minor=%d (err=%d)\n",
+                                                        wdt_miscdev.minor, rc);
                 goto err_out_reboot;
         }
 
-        printk(KERN_INFO PFX "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
+        printk(KERN_INFO PFX
+          "WDT driver for W83877F initialised. timeout=%d sec (nowayout=%d)\n",
                 timeout, nowayout);
 
         return 0;
@@ -397,9 +400,9 @@ static int __init w83877f_wdt_init(void)
 err_out_reboot:
         unregister_reboot_notifier(&wdt_notifier);
 err_out_region2:
-        release_region(WDT_PING,1);
+        release_region(WDT_PING, 1);
 err_out_region1:
-        release_region(ENABLE_W83877F_PORT,2);
+        release_region(ENABLE_W83877F_PORT, 2);
 err_out:
         return rc;
 }