1 files changed, 72 insertions, 127 deletions

diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c
index 1d64e277567..0240c60d14e 100644
--- a/drivers/watchdog/wdrtas.c
+++ b/drivers/watchdog/wdrtas.c
@@ -26,6 +26,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/fs.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
@@ -35,9 +37,9 @@
 #include <linux/reboot.h>
 #include <linux/types.h>
 #include <linux/watchdog.h>
+#include <linux/uaccess.h>
 
 #include <asm/rtas.h>
-#include <asm/uaccess.h>
 
 #define WDRTAS_MAGIC_CHAR		42
 #define WDRTAS_SUPPORTED_MASK		(WDIOF_SETTIMEOUT | \
@@ -46,17 +48,10 @@
 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
 MODULE_DESCRIPTION("RTAS watchdog driver");
 MODULE_LICENSE("GPL");
-MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS_MISCDEV(TEMP_MINOR);
-
-#ifdef CONFIG_WATCHDOG_NOWAYOUT
-static int wdrtas_nowayout = 1;
-#else
-static int wdrtas_nowayout = 0;
-#endif
 
+static bool wdrtas_nowayout = WATCHDOG_NOWAYOUT;
 static atomic_t wdrtas_miscdev_open = ATOMIC_INIT(0);
-static char wdrtas_expect_close = 0;
+static char wdrtas_expect_close;
 
 static int wdrtas_interval;
 
@@ -86,8 +81,8 @@ static char wdrtas_logbuffer[WDRTAS_LOGBUFFER_LEN];
  * RTAS function set-indicator (surveillance). The unit of interval is
  * seconds.
  */
-static int
-wdrtas_set_interval(int interval)
+
+static int wdrtas_set_interval(int interval)
 {
 	long result;
 	static int print_msg = 10;
@@ -97,15 +92,17 @@ wdrtas_set_interval(int interval)
 
 	result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL,
 			   WDRTAS_SURVEILLANCE_IND, 0, interval);
-	if ( (result < 0) && (print_msg) ) {
-		printk(KERN_ERR "wdrtas: setting the watchdog to %i "
-		       "timeout failed: %li\n", interval, result);
+	if (result < 0 && print_msg) {
+		pr_err("setting the watchdog to %i timeout failed: %li\n",
+		       interval, result);
 		print_msg--;
 	}
 
 	return result;
 }
 
+#define WDRTAS_SP_SPI_LEN 4
+
 /**
  * wdrtas_get_interval - returns the current watchdog interval
  * @fallback_value: value (in seconds) to use, if the RTAS call fails
@@ -116,18 +113,23 @@ wdrtas_set_interval(int interval)
  * as reported by the RTAS function ibm,get-system-parameter. The unit
  * of the return value is seconds.
  */
-static int
-wdrtas_get_interval(int fallback_value)
+static int wdrtas_get_interval(int fallback_value)
 {
 	long result;
-	char value[4];
+	char value[WDRTAS_SP_SPI_LEN];
 
+	spin_lock(&rtas_data_buf_lock);
+	memset(rtas_data_buf, 0, WDRTAS_SP_SPI_LEN);
 	result = rtas_call(wdrtas_token_get_sp, 3, 1, NULL,
-			   WDRTAS_SP_SPI, (void *)__pa(&value), 4);
-	if ( (value[0] != 0) || (value[1] != 2) || (value[3] != 0) ||
-	     (result < 0) ) {
-		printk(KERN_WARNING "wdrtas: could not get sp_spi watchdog "
-		       "timeout (%li). Continuing\n", result);
+			   WDRTAS_SP_SPI, __pa(rtas_data_buf),
+			   WDRTAS_SP_SPI_LEN);
+
+	memcpy(value, rtas_data_buf, WDRTAS_SP_SPI_LEN);
+	spin_unlock(&rtas_data_buf_lock);
+
+	if (value[0] != 0 || value[1] != 2 || value[3] != 0 || result < 0) {
+		pr_warn("could not get sp_spi watchdog timeout (%li). Continuing\n",
+			result);
 		return fallback_value;
 	}
 
@@ -141,8 +143,7 @@ wdrtas_get_interval(int fallback_value)
  * wdrtas_timer_start starts the watchdog by calling the RTAS function
  * set-interval (surveillance)
  */
-static void
-wdrtas_timer_start(void)
+static void wdrtas_timer_start(void)
 {
 	wdrtas_set_interval(wdrtas_interval);
 }
@@ -153,47 +154,19 @@ wdrtas_timer_start(void)
  * wdrtas_timer_stop stops the watchdog timer by calling the RTAS function
  * set-interval (surveillance)
  */
-static void
-wdrtas_timer_stop(void)
+static void wdrtas_timer_stop(void)
 {
 	wdrtas_set_interval(0);
 }
 
 /**
- * wdrtas_log_scanned_event - logs an event we received during keepalive
- *
- * wdrtas_log_scanned_event prints a message to the log buffer dumping
- * the results of the last event-scan call
- */
-static void
-wdrtas_log_scanned_event(void)
-{
-	int i;
-
-	for (i = 0; i < WDRTAS_LOGBUFFER_LEN; i += 16)
-		printk(KERN_INFO "wdrtas: dumping event (line %i/%i), data = "
-		       "%02x %02x %02x %02x  %02x %02x %02x %02x   "
-		       "%02x %02x %02x %02x  %02x %02x %02x %02x\n",
-		       (i / 16) + 1, (WDRTAS_LOGBUFFER_LEN / 16),
-		       wdrtas_logbuffer[i + 0], wdrtas_logbuffer[i + 1], 
-		       wdrtas_logbuffer[i + 2], wdrtas_logbuffer[i + 3], 
-		       wdrtas_logbuffer[i + 4], wdrtas_logbuffer[i + 5], 
-		       wdrtas_logbuffer[i + 6], wdrtas_logbuffer[i + 7], 
-		       wdrtas_logbuffer[i + 8], wdrtas_logbuffer[i + 9], 
-		       wdrtas_logbuffer[i + 10], wdrtas_logbuffer[i + 11], 
-		       wdrtas_logbuffer[i + 12], wdrtas_logbuffer[i + 13], 
-		       wdrtas_logbuffer[i + 14], wdrtas_logbuffer[i + 15]);
-}
-
-/**
  * wdrtas_timer_keepalive - resets watchdog timer to keep system alive
  *
  * wdrtas_timer_keepalive restarts the watchdog timer by calling the
  * RTAS function event-scan and repeats these calls as long as there are
  * events available. All events will be dumped.
  */
-static void
-wdrtas_timer_keepalive(void)
+static void wdrtas_timer_keepalive(void)
 {
 	long result;
 
@@ -203,10 +176,11 @@ wdrtas_timer_keepalive(void)
 				   (void *)__pa(wdrtas_logbuffer),
 				   WDRTAS_LOGBUFFER_LEN);
 		if (result < 0)
-			printk(KERN_ERR "wdrtas: event-scan failed: %li\n",
-			       result);
+			pr_err("event-scan failed: %li\n", result);
 		if (result == 0)
-			wdrtas_log_scanned_event();
+			print_hex_dump(KERN_INFO, "dumping event, data: ",
+				DUMP_PREFIX_OFFSET, 16, 1,
+				wdrtas_logbuffer, WDRTAS_LOGBUFFER_LEN, false);
 	} while (result == 0);
 }
 
@@ -218,19 +192,15 @@ wdrtas_timer_keepalive(void)
  * wdrtas_get_temperature returns the current temperature in Fahrenheit. It
  * uses the RTAS call get-sensor-state, token 3 to do so
  */
-static int
-wdrtas_get_temperature(void)
+static int wdrtas_get_temperature(void)
 {
-	long result;
+	int result;
 	int temperature = 0;
 
-	result = rtas_call(wdrtas_token_get_sensor_state, 2, 2,
-			   (void *)__pa(&temperature),
-			   WDRTAS_THERMAL_SENSOR, 0);
+	result = rtas_get_sensor(WDRTAS_THERMAL_SENSOR, 0, &temperature);
 
 	if (result < 0)
-		printk(KERN_WARNING "wdrtas: reading the thermal sensor "
-		       "faild: %li\n", result);
+		pr_warn("reading the thermal sensor failed: %i\n", result);
 	else
 		temperature = ((temperature * 9) / 5) + 32; /* fahrenheit */
 
@@ -243,8 +213,7 @@ wdrtas_get_temperature(void)
  * returns a bitmask of defines WDIOF_... as defined in
  * include/linux/watchdog.h
  */
-static int
-wdrtas_get_status(void)
+static int wdrtas_get_status(void)
 {
 	return 0; /* TODO */
 }
@@ -255,8 +224,7 @@ wdrtas_get_status(void)
  * returns a bitmask of defines WDIOF_... as defined in
  * include/linux/watchdog.h, indicating why the watchdog rebooted the system
  */
-static int
-wdrtas_get_boot_status(void)
+static int wdrtas_get_boot_status(void)
 {
 	return 0; /* TODO */
 }
@@ -276,8 +244,7 @@ wdrtas_get_boot_status(void)
  * character 'V'. This character allows the watchdog device to be closed
  * properly.
  */
-static ssize_t
-wdrtas_write(struct file *file, const char __user *buf,
+static ssize_t wdrtas_write(struct file *file, const char __user *buf,
 	     size_t len, loff_t *ppos)
 {
 	int i;
@@ -306,7 +273,6 @@ out:
 
 /**
  * wdrtas_ioctl - ioctl function for the watchdog device
- * @inode: inode structure
  * @file: file structure
  * @cmd: command for ioctl
  * @arg: argument pointer
@@ -315,16 +281,16 @@ out:
  *
  * wdrtas_ioctl implements the watchdog API ioctls
  */
-static int
-wdrtas_ioctl(struct inode *inode, struct file *file,
-	     unsigned int cmd, unsigned long arg)
+
+static long wdrtas_ioctl(struct file *file, unsigned int cmd,
+							unsigned long arg)
 {
 	int __user *argp = (void __user *)arg;
 	int i;
-	static struct watchdog_info wdinfo = {
+	static const struct watchdog_info wdinfo = {
 		.options = WDRTAS_SUPPORTED_MASK,
 		.firmware_version = 0,
-		.identity = "wdrtas"
+		.identity = "wdrtas",
 	};
 
 	switch (cmd) {
@@ -357,9 +323,9 @@ wdrtas_ioctl(struct inode *inode, struct file *file,
 			wdrtas_timer_keepalive();
 			wdrtas_timer_start();
 		}
+		/* not implemented. Done by H8
 		if (i & WDIOS_TEMPPANIC) {
-			/* not implemented. Done by H8 */
-		}
+		} */
 		return 0;
 
 	case WDIOC_KEEPALIVE:
@@ -399,8 +365,7 @@ wdrtas_ioctl(struct inode *inode, struct file *file,
  *
  * function called when watchdog device is opened
  */
-static int
-wdrtas_open(struct inode *inode, struct file *file)
+static int wdrtas_open(struct inode *inode, struct file *file)
 {
 	/* only open once */
 	if (atomic_inc_return(&wdrtas_miscdev_open) > 1) {
@@ -423,15 +388,13 @@ wdrtas_open(struct inode *inode, struct file *file)
  *
  * close function. Always succeeds
  */
-static int
-wdrtas_close(struct inode *inode, struct file *file)
+static int wdrtas_close(struct inode *inode, struct file *file)
 {
 	/* only stop watchdog, if this was announced using 'V' before */
 	if (wdrtas_expect_close == WDRTAS_MAGIC_CHAR)
 		wdrtas_timer_stop();
 	else {
-		printk(KERN_WARNING "wdrtas: got unexpected close. Watchdog "
-		       "not stopped.\n");
+		pr_warn("got unexpected close. Watchdog not stopped.\n");
 		wdrtas_timer_keepalive();
 	}
 
@@ -453,8 +416,7 @@ wdrtas_close(struct inode *inode, struct file *file)
  * wdrtas_temp_read gives the temperature to the users by copying this
  * value as one byte into the user space buffer. The unit is Fahrenheit...
  */
-static ssize_t
-wdrtas_temp_read(struct file *file, char __user *buf,
+static ssize_t wdrtas_temp_read(struct file *file, char __user *buf,
 		 size_t count, loff_t *ppos)
 {
 	int temperature = 0;
@@ -478,8 +440,7 @@ wdrtas_temp_read(struct file *file, char __user *buf,
  *
  * function called when temperature device is opened
  */
-static int
-wdrtas_temp_open(struct inode *inode, struct file *file)
+static int wdrtas_temp_open(struct inode *inode, struct file *file)
 {
 	return nonseekable_open(inode, file);
 }
@@ -493,8 +454,7 @@ wdrtas_temp_open(struct inode *inode, struct file *file)
  *
  * close function. Always succeeds
  */
-static int
-wdrtas_temp_close(struct inode *inode, struct file *file)
+static int wdrtas_temp_close(struct inode *inode, struct file *file)
 {
 	return 0;
 }
@@ -509,10 +469,10 @@ wdrtas_temp_close(struct inode *inode, struct file *file)
  *
  * wdrtas_reboot stops the watchdog in case of a reboot
  */
-static int
-wdrtas_reboot(struct notifier_block *this, unsigned long code, void *ptr)
+static int wdrtas_reboot(struct notifier_block *this,
+					unsigned long code, void *ptr)
 {
-	if ( (code==SYS_DOWN) || (code==SYS_HALT) )
+	if (code == SYS_DOWN || code == SYS_HALT)
 		wdrtas_timer_stop();
 
 	return NOTIFY_DONE;
@@ -524,7 +484,7 @@ static const struct file_operations wdrtas_fops = {
 	.owner		= THIS_MODULE,
 	.llseek		= no_llseek,
 	.write		= wdrtas_write,
-	.ioctl		= wdrtas_ioctl,
+	.unlocked_ioctl	= wdrtas_ioctl,
 	.open		= wdrtas_open,
 	.release	= wdrtas_close,
 };
@@ -556,41 +516,34 @@ static struct notifier_block wdrtas_notifier = {
 /**
  * wdrtas_get_tokens - reads in RTAS tokens
  *
- * returns 0 on succes, <0 on failure
+ * returns 0 on success, <0 on failure
  *
  * wdrtas_get_tokens reads in the tokens for the RTAS calls used in
  * this watchdog driver. It tolerates, if "get-sensor-state" and
  * "ibm,get-system-parameter" are not available.
  */
-static int
-wdrtas_get_tokens(void)
+static int wdrtas_get_tokens(void)
 {
 	wdrtas_token_get_sensor_state = rtas_token("get-sensor-state");
 	if (wdrtas_token_get_sensor_state == RTAS_UNKNOWN_SERVICE) {
-		printk(KERN_WARNING "wdrtas: couldn't get token for "
-		       "get-sensor-state. Trying to continue without "
-		       "temperature support.\n");
+		pr_warn("couldn't get token for get-sensor-state. Trying to continue without temperature support.\n");
 	}
 
 	wdrtas_token_get_sp = rtas_token("ibm,get-system-parameter");
 	if (wdrtas_token_get_sp == RTAS_UNKNOWN_SERVICE) {
-		printk(KERN_WARNING "wdrtas: couldn't get token for "
-		       "ibm,get-system-parameter. Trying to continue with "
-		       "a default timeout value of %i seconds.\n",
-		       WDRTAS_DEFAULT_INTERVAL);
+		pr_warn("couldn't get token for ibm,get-system-parameter. Trying to continue with a default timeout value of %i seconds.\n",
+			WDRTAS_DEFAULT_INTERVAL);
 	}
 
 	wdrtas_token_set_indicator = rtas_token("set-indicator");
 	if (wdrtas_token_set_indicator == RTAS_UNKNOWN_SERVICE) {
-		printk(KERN_ERR "wdrtas: couldn't get token for "
-		       "set-indicator. Terminating watchdog code.\n");
+		pr_err("couldn't get token for set-indicator. Terminating watchdog code.\n");
 		return -EIO;
 	}
 
 	wdrtas_token_event_scan = rtas_token("event-scan");
 	if (wdrtas_token_event_scan == RTAS_UNKNOWN_SERVICE) {
-		printk(KERN_ERR "wdrtas: couldn't get token for event-scan. "
-		       "Terminating watchdog code.\n");
+		pr_err("couldn't get token for event-scan. Terminating watchdog code.\n");
 		return -EIO;
 	}
 
@@ -603,8 +556,7 @@ wdrtas_get_tokens(void)
  * wdrtas_register_devs unregisters the watchdog and temperature watchdog
  * misc devs
  */
-static void
-wdrtas_unregister_devs(void)
+static void wdrtas_unregister_devs(void)
 {
 	misc_deregister(&wdrtas_miscdev);
 	if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE)
@@ -614,29 +566,25 @@ wdrtas_unregister_devs(void)
 /**
  * wdrtas_register_devs - registers the misc dev handlers
  *
- * returns 0 on succes, <0 on failure
+ * returns 0 on success, <0 on failure
  *
  * wdrtas_register_devs registers the watchdog and temperature watchdog
  * misc devs
  */
-static int
-wdrtas_register_devs(void)
+static int wdrtas_register_devs(void)
 {
 	int result;
 
 	result = misc_register(&wdrtas_miscdev);
 	if (result) {
-		printk(KERN_ERR "wdrtas: couldn't register watchdog misc "
-		       "device. Terminating watchdog code.\n");
+		pr_err("couldn't register watchdog misc device. Terminating watchdog code.\n");
 		return result;
 	}
 
 	if (wdrtas_token_get_sensor_state != RTAS_UNKNOWN_SERVICE) {
 		result = misc_register(&wdrtas_tempdev);
 		if (result) {
-			printk(KERN_WARNING "wdrtas: couldn't register "
-			       "watchdog temperature misc device. Continuing "
-			       "without temperature support.\n");
+			pr_warn("couldn't register watchdog temperature misc device. Continuing without temperature support.\n");
 			wdrtas_token_get_sensor_state = RTAS_UNKNOWN_SERVICE;
 		}
 	}
@@ -647,12 +595,11 @@ wdrtas_register_devs(void)
 /**
  * wdrtas_init - init function of the watchdog driver
  *
- * returns 0 on succes, <0 on failure
+ * returns 0 on success, <0 on failure
  *
  * registers the file handlers and the reboot notifier
  */
-static int __init
-wdrtas_init(void)
+static int __init wdrtas_init(void)
 {
 	if (wdrtas_get_tokens())
 		return -ENODEV;
@@ -661,8 +608,7 @@ wdrtas_init(void)
 		return -ENODEV;
 
 	if (register_reboot_notifier(&wdrtas_notifier)) {
-		printk(KERN_ERR "wdrtas: could not register reboot notifier. "
-		       "Terminating watchdog code.\n");
+		pr_err("could not register reboot notifier. Terminating watchdog code.\n");
 		wdrtas_unregister_devs();
 		return -ENODEV;
 	}
@@ -680,8 +626,7 @@ wdrtas_init(void)
  *
  * unregisters the file handlers and the reboot notifier
  */
-static void __exit
-wdrtas_exit(void)
+static void __exit wdrtas_exit(void)
 {
 	if (!wdrtas_nowayout)
 		wdrtas_timer_stop();