| Message ID | 20210618195033.3209598-1-grzegorz.jaszczyk@linaro.org |
|---|---|
| Headers | show |
| Series | introduce watchdog_dev_suspend/resume | expand |
On Fri, 18 Jun 2021 at 21:50, Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> wrote: > > Hi All, > > The following is a v2 version of the series [1] that fixes system hang which > occurs when the ping worker fires after wdog suspend and before wdog resume. > This happens because the ping worker can issue low-level ping while the wdog clk > was disabled by the suspend routine (accessing hw wdog registers while they are > not fed by the clk). > > To overcome this issue two patches were introduced. Patch #1 introduces pm > notifier in the watchdog core which will call watchdog_dev_suspend/resume and > actually cancel ping worker during suspend and restore it back, if needed, > during resume. > > Patch #2 introduces relevant changes to imx2_wdt driver and notifies wdog core > to stop ping worker on suspend. > > [1] https://lkml.org/lkml/2021/6/15/542 > > Best regards, > Grzegorz > > Grzegorz Jaszczyk (2): > watchdog: introduce watchdog_dev_suspend/resume > watchdog: imx2_wdg: notify wdog core to stop ping worker on suspend > > drivers/watchdog/imx2_wdt.c | 1 + > drivers/watchdog/watchdog_core.c | 37 +++++++++++++++++++++++++ > drivers/watchdog/watchdog_dev.c | 47 ++++++++++++++++++++++++++++++++ > include/linux/watchdog.h | 10 +++++++ > 4 files changed, 95 insertions(+) > > -- > 2.29.0 > Hi, Gentle reminder about this patch-set. Both patches were reviewed by Guenter Roeck and are on the list for some time, I would be happy if we could get them applied. Thank you in advance, Grzegorz