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Subject[PATCH] [2.4.20-pre1] Watchdog Stuff (1/4)
        Here are four patches for the watchdog drivers.  These patches
are an update to 2.4.20-pre1 of the original set against 2.4.19-pre9.
The first patch (this one) adds WDIOC_SETTIMEOUT support to
wafer5823wdt.c. The second patch adds Matt Domsch's 'nowayout' module
option to the drivers that currently don't have it. The third patch
fixes a bug where most of the "magic close character" capable drivers
don't use get_user(). The fourth patch adds "magic close character"
support to almost all of the remaining drivers. It also adds
WDIOF_MAGICCLOSE to the driver info flags.

Joel

diff -uNr linux-2.4.20-pre1/drivers/char/wafer5823wdt.c linux-2.4.20-pre1-settimeout/drivers/char/wafer5823wdt.c
--- linux-2.4.20-pre1/drivers/char/wafer5823wdt.c Fri Aug 2 17:39:43 2002
+++ linux-2.4.20-pre1-settimeout/drivers/char/wafer5823wdt.c Wed Aug 7 15:24:03 2002
@@ -54,6 +54,7 @@
#define WDT_STOP 0x843

#define WD_TIMO 60 /* 1 minute */
+static int wd_margin = WD_TIMO;

static void wafwdt_ping(void)
{
@@ -67,7 +68,7 @@
static void wafwdt_start(void)
{
/* start up watchdog */
- outb_p(WD_TIMO, WDT_START);
+ outb_p(wd_margin, WDT_START);
inb_p(WDT_START);
}

@@ -94,8 +95,10 @@
static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
{
+ int new_margin;
static struct watchdog_info ident = {
- WDIOF_KEEPALIVEPING, 1, "Wafer 5823 WDT"
+ WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT,
+ 1, "Wafer 5823 WDT"
};
int one=1;

@@ -114,6 +117,18 @@
case WDIOC_KEEPALIVE:
wafwdt_ping();
break;
+
+ case WDIOC_SETTIMEOUT:
+ if (get_user(new_margin, (int *)arg))
+ return -EFAULT;
+ if ((new_margin < 1) || (new_margin > 255))
+ return -EINVAL;
+ wd_margin = new_margin;
+ wafwdt_stop();
+ wafwdt_start();
+ /* Fall */
+ case WDIOC_GETTIMEOUT:
+ return put_user(wd_margin, (int *)arg);

default:
return -ENOTTY;
--

"What do you take me for, an idiot?"
- General Charles de Gaulle, when a journalist asked him
if he was happy.
Joel Becker
Senior Member of Technical Staff
Oracle Corporation
E-mail: joel.becker@oracle.com
Phone: (650) 506-8127
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