[PATCH] 2.6.0-test3 - Watchdog patches (sbc60xxwdt.c and advantechwdt.c)
From: Wim Van Sebroeck
Date: Sat Aug 09 2003 - 09:51:28 EST
Hi Linus,
please do a
bk pull http://linux-watchdog.bkbits.net/linux-2.5-watchdog
This will update the following files:
drivers/char/watchdog/advantechwdt.c | 17 -
drivers/char/watchdog/sbc60xxwdt.c | 332 +++++++++++++++++++++--------------
2 files changed, 209 insertions(+), 140 deletions(-)
through these ChangeSets:
<wim@xxxxxxxxx> (03/08/09 1.1136)
[WATCHDOG] sbc60xxwdt.c patch
general cleanup of trailing spaces and comments
fix possible wdt_is_open race
add KERN_* to printk's
changed watchdog_info to correctly reflect what the driver offers
added WDIOC_GETSTATUS, WDIOC_GETBOOTSTATUS, WDIOC_SETTIMEOUT, WDIOC_GETTIMEOUT, and WDIOC_SETOPTIONS ioctls
made timeout (the emulated heartbeat) a module_param
made the keepalive ping an internal subroutine
added MODULE_AUTHOR and MODULE_DESCRIPTION info
<wim@xxxxxxxxx> (03/08/09 1.1137)
[WATCHDOG] sbc60xxwdt patch2
report default timeout as a number
<wim@xxxxxxxxx> (03/08/09 1.1138)
[WATCHDOG] sbc60xxwdt patch3
make wdt_stop and wdt_start module params
<wim@xxxxxxxxx> (03/08/09 1.1139)
[WATCHDOG] sbc60xxwdt patch4
added extra printk's to report what problem occured
<wim@xxxxxxxxx> (03/08/09 1.1140)
[WATCHDOG] sbc60xxwdt.c patch5
some last clean-ups
<wim@xxxxxxxxx> (03/08/09 1.1141)
[WATCHDOG] advantechwdt.c patch2
some small clean-ups (use PFX + report default timeout as it's value in the MODULE_PARM_DESC)
The ChangeSets can also be looked at on:
http://linux-watchdog.bkbits.net:8080/linux-2.5-watchdog
For completeness, I added the patches below.
Greetings,
Wim.
================================================================================
diff -Nru a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
--- a/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:40:23 2003
+++ b/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:40:23 2003
@@ -7,51 +7,38 @@
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
- *
- * The author does NOT admit liability nor provide warranty for
- * any of this software. This material is provided "AS-IS" in
- * the hope that it may be useful for others.
*
- * (c) Copyright 2000 Jakob Oestergaard <jakob@xxxxxxxxxxxx>
+ * The author does NOT admit liability nor provide warranty for
+ * any of this software. This material is provided "AS-IS" in
+ * the hope that it may be useful for others.
+ *
+ * (c) Copyright 2000 Jakob Oestergaard <jakob@xxxxxxxxxxxxx>
*
* 12/4 - 2000 [Initial revision]
* 25/4 - 2000 Added /dev/watchdog support
* 09/5 - 2001 [smj@xxxxxxx] fixed fop_write to "return 1" on success
+ * 12/4 - 2002 [rob@xxxxxxxxxxxxxx] eliminate fop_read
+ * fix possible wdt_is_open race
+ * add CONFIG_WATCHDOG_NOWAYOUT support
+ * remove lock_kernel/unlock_kernel pairs
+ * added KERN_* to printk's
+ * got rid of extraneous comments
+ * 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@xxxxxxxxx] cleanup of trailing spaces
+ * use module_param
+ * made timeout (the emulated heartbeat) a module_param
+ * made the keepalive ping an internal subroutine
+ * added MODULE_AUTHOR and MODULE_DESCRIPTION info
*
*
- * Theory of operation:
- * A Watchdog Timer (WDT) is a hardware circuit that can
- * reset the computer system in case of a software fault.
- * You probably knew that already.
- *
- * Usually a userspace daemon will notify the kernel WDT driver
- * via the /proc/watchdog special device file that userspace is
- * still alive, at regular intervals. When such a notification
- * occurs, the driver will usually tell the hardware watchdog
- * that everything is in order, and that the watchdog should wait
- * for yet another little while to reset the system.
- * If userspace fails (RAM error, kernel bug, whatever), the
- * notifications cease to occur, and the hardware watchdog will
- * reset the system (causing a reboot) after the timeout occurs.
- *
- * This WDT driver is different from the other Linux WDT
- * drivers in several ways:
+ * This WDT driver is different from the other Linux WDT
+ * drivers in the following ways:
* *) The driver will ping the watchdog by itself, because this
* particular WDT has a very short timeout (one second) and it
* would be insane to count on any userspace daemon always
* getting scheduled within that time frame.
- * *) This driver expects the userspace daemon to send a specific
- * character code ('V') to /dev/watchdog before closing the
- * /dev/watchdog file. If the userspace daemon closes the file
- * without sending this special character, the driver will assume
- * that the daemon (and userspace in general) died, and will
- * stop pinging the WDT without disabling it first. This will
- * cause a reboot.
- *
- * Why `V' ? Well, `V' is the character in ASCII for the value 86,
- * and we all know that 86 is _the_ most random number in the universe.
- * Therefore it is the letter that has the slightest chance of occurring
- * by chance, when the system becomes corrupted.
*
*/
@@ -73,11 +60,12 @@
#include <asm/system.h>
#define OUR_NAME "sbc60xxwdt"
+#define PFX OUR_NAME ": "
/*
* You must set these - The driver cannot probe for the settings
*/
-
+
#define WDT_STOP 0x45
#define WDT_START 0x443
@@ -92,19 +80,16 @@
/*
* We must not require too good response from the userspace daemon.
* Here we require the userspace daemon to send us a heartbeat
- * char to /dev/watchdog every 10 seconds.
- * If the daemon pulses us every 5 seconds, we can still afford
+ * char to /dev/watchdog every 30 seconds.
+ * If the daemon pulses us every 25 seconds, we can still afford
* a 5 second scheduling delay on the (high priority) daemon. That
* should be sufficient for a box under any load.
*/
-#define WDT_HEARTBEAT (HZ * 10)
-
-static void wdt_timer_ping(unsigned long);
-static struct timer_list timer;
-static unsigned long next_heartbeat;
-static int wdt_is_open;
-static int wdt_expect_close;
+#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 */
+module_param(timeout, int, 0);
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=WATCHDOG_TIMEOUT)");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
@@ -115,6 +100,12 @@
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
+static void wdt_timer_ping(unsigned long);
+static struct timer_list timer;
+static unsigned long next_heartbeat;
+static unsigned long wdt_is_open;
+static char wdt_expect_close;
+
/*
* Whack the dog
*/
@@ -122,9 +113,9 @@
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
+ * we agree to ping the WDT
*/
- if(time_before(jiffies, next_heartbeat))
+ if(time_before(jiffies, next_heartbeat))
{
/* Ping the WDT by reading from WDT_START */
inb_p(WDT_START);
@@ -132,22 +123,22 @@
timer.expires = jiffies + WDT_INTERVAL;
add_timer(&timer);
} else {
- printk(OUR_NAME ": Heartbeat lost! Will not ping the watchdog\n");
+ printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
}
}
-/*
+/*
* Utility routines
*/
static void wdt_startup(void)
{
- next_heartbeat = jiffies + WDT_HEARTBEAT;
+ next_heartbeat = jiffies + (timeout * HZ);
/* Start the timer */
- timer.expires = jiffies + WDT_INTERVAL;
+ timer.expires = jiffies + WDT_INTERVAL;
add_timer(&timer);
- printk(OUR_NAME ": Watchdog timer is now enabled.\n");
+ printk(KERN_INFO PFX "Watchdog timer is now enabled.\n");
}
static void wdt_turnoff(void)
@@ -155,9 +146,14 @@
/* Stop the timer */
del_timer(&timer);
inb_p(WDT_STOP);
- printk(OUR_NAME ": Watchdog timer is now disabled...\n");
+ printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
}
+static void wdt_keepalive(void)
+{
+ /* user land ping */
+ next_heartbeat = jiffies + (timeout * HZ);
+}
/*
* /dev/watchdog handling
@@ -169,63 +165,58 @@
if(ppos != &file->f_pos)
return -ESPIPE;
- /* See if we got the magic character */
- if(count)
+ /* See if we got the magic character 'V' and reload the timer */
+ if(count)
{
- size_t ofs;
-
- /* note: just in case someone wrote the magic character
- * five months ago... */
- wdt_expect_close = 0;
-
- /* now scan */
- for(ofs = 0; ofs != count; ofs++)
+ if (!nowayout)
{
- char c;
- if(get_user(c, buf+ofs))
- return -EFAULT;
- if(c == 'V')
- wdt_expect_close = 1;
+ size_t ofs;
+
+ /* note: just in case someone wrote the magic character
+ * five months ago... */
+ wdt_expect_close = 0;
+
+ /* scan to see wether or not we got the magic character */
+ for(ofs = 0; ofs != count; ofs++)
+ {
+ char c;
+ if(get_user(c, buf+ofs))
+ return -EFAULT;
+ if(c == 'V')
+ wdt_expect_close = 42;
+ }
}
+
/* Well, anyhow someone wrote to us, we should return that favour */
- next_heartbeat = jiffies + WDT_HEARTBEAT;
- return 1;
+ wdt_keepalive();
}
- return 0;
+ return count;
}
static int fop_open(struct inode * inode, struct file * file)
{
- switch(minor(inode->i_rdev))
- {
- case WATCHDOG_MINOR:
- /* Just in case we're already talking to someone... */
- if(wdt_is_open)
- return -EBUSY;
- if (nowayout)
- __module_get(THIS_MODULE);
- /* Good, fire up the show */
- wdt_is_open = 1;
- wdt_startup();
- return 0;
+ /* Just in case we're already talking to someone... */
+ if(test_and_set_bit(0, &wdt_is_open))
+ return -EBUSY;
- default:
- return -ENODEV;
- }
+ if (nowayout)
+ __module_get(THIS_MODULE);
+
+ /* Good, fire up the show */
+ wdt_startup();
+ return 0;
}
static int fop_close(struct inode * inode, struct file * file)
{
- if(minor(inode->i_rdev) == WATCHDOG_MINOR)
- {
- if(wdt_expect_close && !nowayout)
- wdt_turnoff();
- else {
- del_timer(&timer);
- printk(OUR_NAME ": device file closed unexpectedly. Will not stop the WDT!\n");
- }
+ 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");
}
- wdt_is_open = 0;
+ clear_bit(0, &wdt_is_open);
+ wdt_expect_close = 0;
return 0;
}
@@ -234,20 +225,58 @@
{
static struct watchdog_info ident=
{
- .options = WDIOF_MAGICCLOSE,
+ .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
.firmware_version = 1,
- .identity = "SB60xx"
+ .identity = "SBC60xx",
};
-
+
switch(cmd)
{
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
return copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))?-EFAULT:0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0, (int *)arg);
case WDIOC_KEEPALIVE:
- next_heartbeat = jiffies + WDT_HEARTBEAT;
+ wdt_keepalive();
return 0;
+ case WDIOC_SETOPTIONS:
+ {
+ int new_options, retval = -EINVAL;
+
+ if(get_user(new_options, (int *)arg))
+ return -EFAULT;
+
+ if(new_options & WDIOS_DISABLECARD) {
+ wdt_turnoff();
+ retval = 0;
+ }
+
+ if(new_options & WDIOS_ENABLECARD) {
+ wdt_startup();
+ retval = 0;
+ }
+
+ return retval;
+ }
+ case WDIOC_SETTIMEOUT:
+ {
+ int new_timeout;
+
+ if(get_user(new_timeout, (int *)arg))
+ return -EFAULT;
+
+ if(new_timeout < 1 || new_timeout > 3600) /* arbitrary upper limit */
+ return -EINVAL;
+
+ timeout = new_timeout;
+ wdt_keepalive();
+ /* Fall through */
+ }
+ case WDIOC_GETTIMEOUT:
+ return put_user(timeout, (int *)arg);
}
}
@@ -257,13 +286,13 @@
.write = fop_write,
.open = fop_open,
.release = fop_close,
- .ioctl = fop_ioctl
+ .ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
- .fops = &wdt_fops
+ .fops = &wdt_fops,
};
/*
@@ -273,21 +302,21 @@
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;
}
-
+
/*
* The WDT needs to learn about soft shutdowns in order to
- * turn the timebomb registers off.
+ * turn the timebomb registers off.
*/
-
+
static struct notifier_block wdt_notifier=
{
.notifier_call = wdt_notify_sys,
.next = NULL,
- .priority = 0
+ .priority = 0,
};
static void __exit sbc60xxwdt_unload(void)
@@ -312,6 +341,13 @@
if (!request_region(WDT_START, 1, "SBC 60XX WDT"))
goto err_out_region1;
+ 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);
+ }
+
init_timer(&timer);
timer.function = wdt_timer_ping;
timer.data = 0;
@@ -324,8 +360,8 @@
if (rc)
goto err_out_miscdev;
- printk(KERN_INFO OUR_NAME ": WDT driver for 60XX single board computer initialised.\n");
-
+ printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised.\n");
+
return 0;
err_out_miscdev:
@@ -341,4 +377,6 @@
module_init(sbc60xxwdt_init);
module_exit(sbc60xxwdt_unload);
+MODULE_AUTHOR("Jakob Oestergaard <jakob@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("60xx Single Board Computer Watchdog Timer driver");
MODULE_LICENSE("GPL");
diff -Nru a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
--- a/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:40:42 2003
+++ b/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:40:42 2003
@@ -89,7 +89,7 @@
#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 */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=WATCHDOG_TIMEOUT)");
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
diff -Nru a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
--- a/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:01 2003
+++ b/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:01 2003
@@ -30,6 +30,7 @@
* use module_param
* made timeout (the emulated heartbeat) a module_param
* made the keepalive ping an internal subroutine
+ * made wdt_stop and wdt_start module params
* added MODULE_AUTHOR and MODULE_DESCRIPTION info
*
*
@@ -66,8 +67,13 @@
* You must set these - The driver cannot probe for the settings
*/
-#define WDT_STOP 0x45
-#define WDT_START 0x443
+static int wdt_stop = 0x45;
+module_param(wdt_stop, int, 0);
+MODULE_PARM_DESC(wdt_stop, "SBC60xx WDT 'stop' io port (default 0x45)");
+
+static int wdt_start = 0x443;
+module_param(wdt_start, int, 0);
+MODULE_PARM_DESC(wdt_start, "SBC60xx WDT 'start' io port (default 0x443)");
/*
* The 60xx board can use watchdog timeout values from one second
@@ -117,8 +123,8 @@
*/
if(time_before(jiffies, next_heartbeat))
{
- /* Ping the WDT by reading from WDT_START */
- inb_p(WDT_START);
+ /* Ping the WDT by reading from wdt_start */
+ inb_p(wdt_start);
/* Re-set the timer interval */
timer.expires = jiffies + WDT_INTERVAL;
add_timer(&timer);
@@ -145,7 +151,7 @@
{
/* Stop the timer */
del_timer(&timer);
- inb_p(WDT_STOP);
+ inb_p(wdt_stop);
printk(KERN_INFO PFX "Watchdog timer is now disabled...\n");
}
@@ -327,19 +333,24 @@
misc_deregister(&wdt_miscdev);
unregister_reboot_notifier(&wdt_notifier);
- release_region(WDT_START,1);
-// release_region(WDT_STOP,1);
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ release_region(wdt_stop,1);
+ release_region(wdt_start,1);
}
static int __init sbc60xxwdt_init(void)
{
int rc = -EBUSY;
-// We cannot reserve 0x45 - the kernel already has!
-// if (!request_region(WDT_STOP, 1, "SBC 60XX WDT"))
-// goto err_out;
- if (!request_region(WDT_START, 1, "SBC 60XX WDT"))
- goto err_out_region1;
+ if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
+ goto err_out;
+
+ /* We cannot reserve 0x45 - the kernel already has! */
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ {
+ if (!request_region(wdt_stop, 1, "SBC 60XX WDT"))
+ goto err_out_region1;
+ }
if(timeout < 1 || timeout > 3600) /* arbitrary upper limit */
{
@@ -367,10 +378,11 @@
err_out_miscdev:
misc_deregister(&wdt_miscdev);
err_out_region2:
- release_region(WDT_START,1);
+ if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
+ release_region(wdt_stop,1);
err_out_region1:
- release_region(WDT_STOP,1);
-/* err_out: */
+ release_region(wdt_start,1);
+err_out:
return rc;
}
diff -Nru a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
--- a/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:20 2003
+++ b/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:20 2003
@@ -343,19 +343,28 @@
int rc = -EBUSY;
if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_start);
+ rc = -EIO;
goto err_out;
+ }
/* We cannot reserve 0x45 - the kernel already has! */
if ((wdt_stop != 0x45) && (wdt_stop != wdt_start))
{
if (!request_region(wdt_stop, 1, "SBC 60XX WDT"))
+ {
+ printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
+ wdt_stop);
goto err_out_region1;
+ }
}
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",
+ printk(KERN_INFO PFX "timeout value must be 1<=x<=3600, using %d\n",
timeout);
}
@@ -365,11 +374,19 @@
rc = misc_register(&wdt_miscdev);
if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
+ wdt_miscdev.minor, rc);
goto err_out_region2;
+ }
rc = register_reboot_notifier(&wdt_notifier);
if (rc)
+ {
+ printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
+ rc);
goto err_out_miscdev;
+ }
printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised.\n");
diff -Nru a/drivers/char/watchdog/sbc60xxwdt.c b/drivers/char/watchdog/sbc60xxwdt.c
--- a/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:39 2003
+++ b/drivers/char/watchdog/sbc60xxwdt.c Sat Aug 9 16:41:39 2003
@@ -342,6 +342,13 @@
{
int rc = -EBUSY;
+ 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);
+ }
+
if (!request_region(wdt_start, 1, "SBC 60XX WDT"))
{
printk(KERN_ERR PFX "I/O address 0x%04x already in use\n",
@@ -361,13 +368,6 @@
}
}
- 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);
- }
-
init_timer(&timer);
timer.function = wdt_timer_ping;
timer.data = 0;
@@ -388,7 +388,8 @@
goto err_out_miscdev;
}
- printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised.\n");
+ printk(KERN_INFO PFX "WDT driver for 60XX single board computer initialised. timeout=%d sec (nowayout=%d)\n",
+ timeout, nowayout);
return 0;
diff -Nru a/drivers/char/watchdog/advantechwdt.c b/drivers/char/watchdog/advantechwdt.c
--- a/drivers/char/watchdog/advantechwdt.c Sat Aug 9 16:41:58 2003
+++ b/drivers/char/watchdog/advantechwdt.c Sat Aug 9 16:41:58 2003
@@ -44,6 +44,7 @@
#include <asm/system.h>
#define WATCHDOG_NAME "Advantech WDT"
+#define PFX WATCHDOG_NAME ": "
#define WATCHDOG_TIMEOUT 60 /* 60 sec default timeout */
static unsigned long advwdt_is_open;
@@ -70,7 +71,7 @@
static int timeout = WATCHDOG_TIMEOUT; /* in seconds */
module_param(timeout, int, 0);
-MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=60.");
+MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=63, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ".");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
@@ -206,7 +207,7 @@
if (adv_expect_close == 42) {
advwdt_disable();
} else {
- printk(KERN_CRIT WATCHDOG_NAME ": Unexpected close, not stopping watchdog!\n");
+ printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
advwdt_ping();
}
clear_bit(0, &advwdt_is_open);
@@ -268,13 +269,13 @@
if (timeout < 1 || timeout > 63) {
timeout = WATCHDOG_TIMEOUT;
- printk (KERN_INFO WATCHDOG_NAME ": timeout value must be 1<=x<=63, using %d\n",
+ printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n",
timeout);
}
if (wdt_stop != wdt_start) {
if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR WATCHDOG_NAME ": I/O address 0x%04x already in use\n",
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_stop);
ret = -EIO;
goto out;
@@ -282,7 +283,7 @@
}
if (!request_region(wdt_start, 1, WATCHDOG_NAME)) {
- printk (KERN_ERR WATCHDOG_NAME ": I/O address 0x%04x already in use\n",
+ printk (KERN_ERR PFX "I/O address 0x%04x already in use\n",
wdt_start);
ret = -EIO;
goto unreg_stop;
@@ -290,19 +291,19 @@
ret = register_reboot_notifier(&advwdt_notifier);
if (ret != 0) {
- printk (KERN_ERR WATCHDOG_NAME ": cannot register reboot notifier (err=%d)\n",
+ printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
ret);
goto unreg_regions;
}
ret = misc_register(&advwdt_miscdev);
if (ret != 0) {
- printk (KERN_ERR WATCHDOG_NAME ": cannot register miscdev on minor=%d (err=%d)\n",
+ printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, ret);
goto unreg_reboot;
}
- printk (KERN_INFO WATCHDOG_NAME ": initialized. timeout=%d sec (nowayout=%d)\n",
+ printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
out:
-
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