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| author |   Sudeep Holla <sudeep.holla@arm.com> | 2016-08-25 13:33:28 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2016-09-01 21:29:11 +0100 |
| commit | 9d04d8bc4c18765f6a1f7b632fffe47b4578fb26 (patch) | |
| tree | 5bb2734ab752524128532123c8c267da95221f67 /drivers/spi/spi-qup.c | |
| parent | Linux 4.8-rc1 (diff) | |
| download | linux-dev-9d04d8bc4c18765f6a1f7b632fffe47b4578fb26.tar.xz linux-dev-9d04d8bc4c18765f6a1f7b632fffe47b4578fb26.zip | |
spi: qup: skip clk_disable_unprepare if the device is already runtime suspended
If the spi device is already runtime suspended, if spi_qup_suspend is
executed during suspend-to-idle or suspend-to-ram it will result in the
a splat from unpreparing a non-prepared clock.
This patch fixes the issue by executing clk_disable_unprepare conditionally
in spi_qup_suspend.
[Reworded commit message to remove irrelevant backtrace -- broonie]
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Tested-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-qup.c')
| -rw-r--r-- | drivers/spi/spi-qup.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index c338ef1136f6..a047e9882da8 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -982,8 +982,10 @@ static int spi_qup_suspend(struct device *device) if (ret) return ret; - clk_disable_unprepare(controller->cclk); - clk_disable_unprepare(controller->iclk); + if (!pm_runtime_suspended(device)) { + clk_disable_unprepare(controller->cclk); + clk_disable_unprepare(controller->iclk); + } return 0; } |