* [PATCH] [v2] i2c: imx-lpi2c: Fix runtime PM imbalance on error
@ 2020-05-31 3:17 ` Dinghao Liu
0 siblings, 0 replies; 2+ messages in thread
From: Dinghao Liu @ 2020-05-31 3:17 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: Dong Aisheng, Shawn Guo, Sascha Hauer, Pengutronix Kernel Team,
Fabio Estevam, NXP Linux Team, linux-i2c, linux-arm-kernel,
linux-kernel
pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
Changelog:
v2: - Use pm_runtime_put_noidle() instead of
pm_runtime_put_autosuspend().
---
drivers/i2c/busses/i2c-imx-lpi2c.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 94743ba581fe..bdee02dff284 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -260,8 +260,10 @@ static int lpi2c_imx_master_enable(struct lpi2c_imx_struct *lpi2c_imx)
int ret;
ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_noidle(lpi2c_imx->adapter.dev.parent);
return ret;
+ }
temp = MCR_RST;
writel(temp, lpi2c_imx->base + LPI2C_MCR);
--
2.17.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] [v2] i2c: imx-lpi2c: Fix runtime PM imbalance on error
@ 2020-05-31 3:17 ` Dinghao Liu
0 siblings, 0 replies; 2+ messages in thread
From: Dinghao Liu @ 2020-05-31 3:17 UTC (permalink / raw)
To: dinghao.liu, kjlu
Cc: Dong Aisheng, Shawn Guo, Sascha Hauer, linux-kernel,
NXP Linux Team, Pengutronix Kernel Team, Fabio Estevam,
linux-arm-kernel, linux-i2c
pm_runtime_get_sync() increments the runtime PM usage counter even
the call returns an error code. Thus a pairing decrement is needed
on the error handling path to keep the counter balanced.
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
Changelog:
v2: - Use pm_runtime_put_noidle() instead of
pm_runtime_put_autosuspend().
---
drivers/i2c/busses/i2c-imx-lpi2c.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
index 94743ba581fe..bdee02dff284 100644
--- a/drivers/i2c/busses/i2c-imx-lpi2c.c
+++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
@@ -260,8 +260,10 @@ static int lpi2c_imx_master_enable(struct lpi2c_imx_struct *lpi2c_imx)
int ret;
ret = pm_runtime_get_sync(lpi2c_imx->adapter.dev.parent);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_noidle(lpi2c_imx->adapter.dev.parent);
return ret;
+ }
temp = MCR_RST;
writel(temp, lpi2c_imx->base + LPI2C_MCR);
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-05-31 3:25 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-05-31 3:17 [PATCH] [v2] i2c: imx-lpi2c: Fix runtime PM imbalance on error Dinghao Liu
2020-05-31 3:17 ` Dinghao Liu
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.