From: Vinod Koul <vkoul@kernel.org>
To: Mark Brown <broonie@kernel.org>
Cc: linux-arm-msm@vger.kernel.org,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Yuji Sasaki <sasakiy@chromium.org>,
Andy Gross <agross@kernel.org>,
linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
Vinod Koul <vkoul@kernel.org>
Subject: [PATCH] spi: qup: call spi_qup_pm_resume_runtime before suspending
Date: Fri, 14 Feb 2020 13:13:40 +0530 [thread overview]
Message-ID: <20200214074340.2286170-1-vkoul@kernel.org> (raw)
From: Yuji Sasaki <sasakiy@chromium.org>
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@chromium.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
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 dd3434a407ea..a364b99497e2 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;
}
--
2.24.1
next reply other threads:[~2020-02-14 7:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-14 7:43 Vinod Koul [this message]
[not found] ` <20200214074340.2286170-1-vkoul-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2020-02-21 14:21 ` Applied "spi: qup: call spi_qup_pm_resume_runtime before suspending" to the spi tree Mark Brown
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