diff options
| author | David Lin <dtwlin@google.com> | 2016-07-26 23:27:28 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2016-07-27 03:58:37 (GMT) |
| commit | 7c4a0edb38ba734bd89efbda4262698a58839c26 (patch) | |
| tree | a0c4cfc896bbfc7d4198f71a75047e4279533569 /drivers/staging/greybus/Documentation/sysfs-bus-greybus | |
| parent | 6136cce89ca5d344d5183d36e887f0ff46896f1c (diff) | |
| download | linux-7c4a0edb38ba734bd89efbda4262698a58839c26.tar.xz | |
greybus: svc_watchdog: Add sysfs file to change the behavior of bite
Currently, AP performs unipro_reset if SVC fails to response to its
ping. While this error recovery is best suited for the end-user
experience, errors in the UniPro network could potentially go unnoticed
by the QA and fishfooders in the development phase of the project. This
patch adds an option to trigger a kernel panic so logs can be collected
for analysis.
Testing Done:
- Reproduce issue and observe kernel panic when
watchdob_control is changed to 'panic'
Signed-off-by: David Lin <dtwlin@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/Documentation/sysfs-bus-greybus')
| -rw-r--r-- | drivers/staging/greybus/Documentation/sysfs-bus-greybus | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/staging/greybus/Documentation/sysfs-bus-greybus b/drivers/staging/greybus/Documentation/sysfs-bus-greybus index e202eac..c49c81b 100644 --- a/drivers/staging/greybus/Documentation/sysfs-bus-greybus +++ b/drivers/staging/greybus/Documentation/sysfs-bus-greybus @@ -257,3 +257,19 @@ Contact: Greg Kroah-Hartman <greg@kroah.com> Description: If the SVC watchdog is enabled or not. Writing 0 to this file will disable the watchdog, writing 1 will enable it. + +What: /sys/bus/greybus/devices/N-svc/watchdog_action +Date: July 2016 +KernelVersion: 4.XX +Contact: Greg Kroah-Hartman <greg@kroah.com> +Description: + This attribute indicates the action to be performed upon SVC + watchdog bite. + + The action can be one of the "reset" or "panic". Writing either + one of the "reset" or "panic" will change the behavior of SVC + watchdog bite. Default value is "reset". + + "reset" means the UniPro subsystem is to be reset. + + "panic" means SVC watchdog bite will cause kernel to panic. |