Re: [PATCH] dmaengine: rcar-dmac: Fix too early/late system suspend/resume callbacks
From: Vinod Koul
Date: Wed Apr 04 2018 - 01:50:10 EST
On Thu, Mar 29, 2018 at 06:53:32PM +0200, Geert Uytterhoeven wrote:
> If serial console wake-up is enabled ("echo enabled >
> /sys/.../ttySC0/power/wakeup"), and any serial input is received while
> the system is suspended, serial port input no longer works after system
> Note that:
> 1) The system can still be woken up using the serial console,
> 2) Serial port input keeps working if the system is woken up in some
> other way (e.g. Wake-on-LAN or gpio-keys), and no serial input was
> received while suspended.
> To fix this, replace SET_LATE_SYSTEM_SLEEP_PM_OPS() by
> SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(), as the callbacks installed by the
> former happen too early resp. late in the suspend resp. resume process.