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authorGeert Uytterhoeven <geert+renesas@glider.be>2018-03-29 19:53:32 +0300
committerVinod Koul <vinod.koul@intel.com>2018-04-04 08:54:05 +0300
commit73dcc666d6bd0db56cd556010f93d8f04c1cc70c (patch)
tree77582c98745098f472ad7578b28ca044b61e16ef /drivers/dma/sh
parent3e081628d510b2ddbe493371d9c574d9275da17e (diff)
downloadlinux-73dcc666d6bd0db56cd556010f93d8f04c1cc70c.tar.xz
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>
Diffstat (limited to 'drivers/dma/sh')
-rw-r--r--drivers/dma/sh/rcar-dmac.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index c64f792e8e15..65538c0f4cfc 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1686,8 +1686,8 @@ static const struct dev_pm_ops rcar_dmac_pm = {
* - Wait for the current transfer to complete and stop the device,
* - Resume transfers, if any.
*/
- SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
- pm_runtime_force_resume)
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(rcar_dmac_runtime_suspend, rcar_dmac_runtime_resume,
NULL)
};