pm_runtime_get_sync() increases the device's usage count even when
reporting an error, so add a call to pm_runtime_put_noidle() in the
related error branches.
Fixes: 1f50ad2c86cd ("i2c: tegra: Add runtime power-management support")
Signed-off-by: Tobias Jordan <[email protected]>
---
This is one of a number of patches for problems found using coccinelle
scripting in the SIL2LinuxMP project. The patch has been compile-tested;
it's based on linux-next-20180223.
For a discussion of the corresponding issue, see
https://marc.info/?l=linux-pm&m=151904483924999&w=2
drivers/i2c/busses/i2c-tegra.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 60292d243e24..d53136538339 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -484,6 +484,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev)
err = pm_runtime_get_sync(i2c_dev->dev);
if (err < 0) {
dev_err(i2c_dev->dev, "runtime resume failed %d\n", err);
+ pm_runtime_put_noidle(i2c_dev->dev);
return err;
}
@@ -740,6 +741,7 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
ret = pm_runtime_get_sync(i2c_dev->dev);
if (ret < 0) {
dev_err(i2c_dev->dev, "runtime resume failed %d\n", ret);
+ pm_runtime_put_noidle(i2c_dev->dev);
return ret;
}
--
2.11.0
On Sat, Feb 24, 2018 at 11:44:23PM +0100, Tobias Jordan wrote:
> pm_runtime_get_sync() increases the device's usage count even when
> reporting an error, so add a call to pm_runtime_put_noidle() in the
> related error branches.
>
> Fixes: 1f50ad2c86cd ("i2c: tegra: Add runtime power-management support")
> Signed-off-by: Tobias Jordan <[email protected]>
> ---
> This is one of a number of patches for problems found using coccinelle
> scripting in the SIL2LinuxMP project. The patch has been compile-tested;
> it's based on linux-next-20180223.
>
> For a discussion of the corresponding issue, see
> https://marc.info/?l=linux-pm&m=151904483924999&w=2
>
> drivers/i2c/busses/i2c-tegra.c | 2 ++
> 1 file changed, 2 insertions(+)
This seems okay to me, though given the discussion it might be
preferable to just ignore errors rather than fail.
Acked-by: Thierry Reding <[email protected]>