lkml.org 
[lkml]   [2020]   [Nov]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v4] watchdog: qcom_wdt: set WDOG_HW_RUNNING bit when appropriate
From
Date

On 11/2/2020 10:33 AM, Guenter Roeck wrote:
> On 11/1/20 7:58 PM, Kathiravan T wrote:
>> On 10/31/2020 7:38 PM, Guenter Roeck wrote:
>>> On 10/31/20 5:11 AM, Robert Marko wrote:
>>>> If the watchdog hardware is enabled/running during boot, e.g.
>>>> due to a boot loader configuring it, we must tell the
>>>> watchdog framework about this fact so that it can ping the
>>>> watchdog until userspace opens the device and takes over
>>>> control.
>>>>
>>>> Do so using the WDOG_HW_RUNNING flag that exists for exactly
>>>> that use-case.
>>>>
>>>> Signed-off-by: Robert Marko <robert.marko@sartura.hr>
>>> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
>> Thanks for addressing the comments and now the patch looks good to me. One more suggestion, can we make the initcall level of the driver to subsys_initcall_sync so that the driver gets registered immediately after the watchdog_core is registered and watchdog_core starts pinging the WDT?
>>
> That would mean to replace module_platform_driver(), which would be a whole
> different discussion, is not widely needed, and would potentially interfere
> with the subsys_initcall_sync() in the watchdog core. This will require
> specific evidence that a problem is seen in the field, and that it is truly
> needed. Plus, it would have to be a different patch (which you could submit
> yourself, with evidence). Let's stick with one logical change per patch,
> please.
>
> Guenter
Yeah, of course I don't want to squash the initcall level change with
this one. Just made a suggestion to consider it. Anyway I will try to
collect some data and post the patch by own on that suggestion. Thanks
Guenter.

--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

\
 
 \ /
  Last update: 2020-11-02 06:20    [W:0.064 / U:1.080 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site