[PATCH 4.4 01/91] spi: qup: call spi_qup_pm_resume_runtime before suspending

From: Greg Kroah-Hartman
Date: Wed Apr 01 2020 - 12:29:30 EST


From: Yuji Sasaki <sasakiy@xxxxxxxxxxxx>

[ Upstream commit 136b5cd2e2f97581ae560cff0db2a3b5369112da ]

spi_qup_suspend() will cause synchronous external abort when
runtime suspend is enabled and applied, as it tries to
access SPI controller register while clock is already disabled
in spi_qup_pm_suspend_runtime().

Signed-off-by: Yuji sasaki <sasakiy@xxxxxxxxxxxx>
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200214074340.2286170-1-vkoul@xxxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/spi/spi-qup.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 810a7fae34798..2487a91c4cfdb 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -961,6 +961,11 @@ static int spi_qup_suspend(struct device *device)
struct spi_qup *controller = spi_master_get_devdata(master);
int ret;

+ if (pm_runtime_suspended(device)) {
+ ret = spi_qup_pm_resume_runtime(device);
+ if (ret)
+ return ret;
+ }
ret = spi_master_suspend(master);
if (ret)
return ret;
--
2.20.1