[PATCH 5.5 009/119] spi: qup: call spi_qup_pm_resume_runtime before suspending

From: Greg Kroah-Hartman
Date: Tue Mar 24 2020 - 09:23:01 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 | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index dd3434a407ea6..a364b99497e26 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -1217,6 +1217,11 @@ 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;
@@ -1225,10 +1230,8 @@ static int spi_qup_suspend(struct device *device)
if (ret)
return ret;

- if (!pm_runtime_suspended(device)) {
- clk_disable_unprepare(controller->cclk);
- clk_disable_unprepare(controller->iclk);
- }
+ clk_disable_unprepare(controller->cclk);
+ clk_disable_unprepare(controller->iclk);
return 0;
}

--
2.20.1