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watchdog/hpwdt: Have core ping watchdog.

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Instead of stopping the hw timer during probe, have the core update
the timer if the timer is already running.

Signed-off-by: Jerry Hoemann <jerry.hoemann@hpe.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Jerry Hoemann 2019-05-17 14:59:40 -06:00 committed by Wim Van Sebroeck
parent c22d8e38e4
commit bb721d6b9e
1 changed files with 10 additions and 2 deletions
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12
drivers/watchdog/hpwdt.c
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@ -55,6 +55,11 @@ static const struct pci_device_id hpwdt_blacklist[] = {
/*
* Watchdog operations
*/
static int hpwdt_hw_is_running(void)
{
return ioread8(hpwdt_timer_con) & 0x01;
}
static int hpwdt_start(struct watchdog_device *wdd)
{
int control = 0x81 | (pretimeout ? 0x4 : 0);
@ -298,8 +303,11 @@ static int hpwdt_init_one(struct pci_dev *dev,
hpwdt_timer_reg = pci_mem_addr + 0x70;
hpwdt_timer_con = pci_mem_addr + 0x72;
/* Make sure that timer is disabled until /dev/watchdog is opened */
hpwdt_stop();
/* Have the core update running timer until user space is ready */
if (hpwdt_hw_is_running()) {
dev_info(&dev->dev, "timer is running\n");
set_bit(WDOG_HW_RUNNING, &hpwdt_dev.status);
}
/* Initialize NMI Decoding functionality */
retval = hpwdt_init_nmi_decoding(dev);