Observed that the w83627hf watchdog timer start counting during reboot.
If the system load the driver after 5 minutes, it rebooted immediately because of timer expired.
For example, fsck took more than 5 minutes to run, then the computer reboot as soon as the driver was loaded.
Signed-off-by: Tony Chung <tonychung00@xxxxxxxxx>
---
drivers/watchdog/w83627hf_wdt.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/w83627hf_wdt.c b/drivers/watchdog/w83627hf_wdt.c
index 8f1111d..7eaa226 100644
--- a/drivers/watchdog/w83627hf_wdt.c
+++ b/drivers/watchdog/w83627hf_wdt.c
@@ -168,14 +168,16 @@ static void w83627hf_init(void)
pr_info("Watchdog already running. Resetting timeout to %d sec\n",
wdt_get_timeout_secs(timeout));
outb_p(timeout, WDT_EFDR); /* Write back to CRF6 */
+ } else {
+ outb_p(0, WDT_EFDR); /* disable to prevent reboot */
}
w83627hf_setup_crf5();
outb_p(0xF7, WDT_EFER); /* Select CRF7 */
t = inb_p(WDT_EFDR); /* read CRF7 */
- t &= ~0xC0; /* disable keyboard & mouse turning off
- watchdog */
+ t &= ~0xD0; /* clear timeout occurred and disable keyboard
+ & mouse turning off watchdog */
outb_p(t, WDT_EFDR); /* Write back to CRF7 */
w83627hf_unselect_wd_register();
--
1.7.0.4
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