Re: [PATCH] watchdog: iTCO_wdt: Fix detection of SMI-off case

From: Guenter Roeck
Date: Mon Aug 30 2021 - 16:00:28 EST


On 8/30/21 12:47 PM, Jan Kiszka wrote:
On 20.08.21 15:45, Jan Kiszka wrote:
On 26.07.21 13:46, Jan Kiszka wrote:
From: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>

Obviously, the test needs to run against the register content, not its
address.

Fixes: cb011044e34c ("watchdog: iTCO_wdt: Account for rebooting on second timeout")
Reported-by: Mantas Mikulėnas <grawity@xxxxxxxxx>
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
drivers/watchdog/iTCO_wdt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index b3f604669e2c..643c6c2d0b72 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -362,7 +362,7 @@ static int iTCO_wdt_set_timeout(struct watchdog_device *wd_dev, unsigned int t)
* Otherwise, the BIOS generally reboots when the SMI triggers.
*/
if (p->smi_res &&
- (SMI_EN(p) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
+ (inl(SMI_EN(p)) & (TCO_EN | GBL_SMI_EN)) != (TCO_EN | GBL_SMI_EN))
tmrval /= 2;
/* from the specs: */


Ping, this is still missing in master. Stable kernels had the revert,
but 5.14 will need this.


Second reminder: 5.14 is out and now broken. Is the patch queued
somewhere? I do not see it in the watchdog staging branch.


I had it in my own watchdog-next branch for about a month.
Usually Wim picks it up from there or from the mainling list;
he handles all upstreaming. Wim ?

Guenter