wdctl: always query device node when sysfs is unavailable

When there is no sysfs at all for the watchdog, fall back to reading
from the device node.
This is also useful if the legacy compat /dev/watchdog device which
never has a sysfs interface.

Closes: #3073
Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
(cherry picked from commit 8bd4d796f4d6a0480c0744302ca40fa5ad5de070)

diff --git a/sys-utils/wdctl.c b/sys-utils/wdctl.c
index 86119248aa95f0cd2344508d9b7c9f697a477b50..e4ed3839995a547931cfe702ba5f6b50c3f9801c 100644 (file)
--- a/sys-utils/wdctl.c
+++ b/sys-utils/wdctl.c
@@ -608,6 +608,9 @@ static int read_governors(struct wd_device *wd)
 
 static bool should_read_from_device(struct wd_device *wd)
 {
+       if (wd->no_sysfs)
+               return true;
+
        if (!wd->has_nowayout)
                return false;