dmaengine: rcar-dmac: Fix too early/late system suspend/resume callbacks
authorGeert Uytterhoeven <geert+renesas@glider.be>
Thu, 29 Mar 2018 16:53:32 +0000 (18:53 +0200)
committerVinod Koul <vinod.koul@intel.com>
Wed, 4 Apr 2018 05:54:05 +0000 (11:24 +0530)
commit73dcc666d6bd0db56cd556010f93d8f04c1cc70c
tree77582c98745098f472ad7578b28ca044b61e16ef
parent3e081628d510b2ddbe493371d9c574d9275da17e
dmaengine: rcar-dmac: Fix too early/late system suspend/resume callbacks

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
resume.

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.

Reported-by: RVC test team via Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Fixes: 1131b0a4af911de5 ("dmaengine: rcar-dmac: Make DMAC reinit during system resume explicit")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
drivers/dma/sh/rcar-dmac.c