[04/25] media: s5p_cec: decrement usage count if disabled
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Message ID a1c4c8a65061897f66ef119ddfd8ae858eec8a6d.1620207353.git.mchehab+huawei@kernel.org
State New, archived
Headers show
Series
  • Fix some PM runtime issues at the media subsystem
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Commit Message

Mauro Carvalho Chehab May 5, 2021, 9:41 a.m. UTC
There's a bug at s5p_cec_adap_enable(): if called to
disable the device, it should call pm_runtime_put()
instead of pm_runtime_disable(), as the goal here is to
decrement the usage_count and not to disable PM runtime.

Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Fixes: 1bcbf6f4b6b0 ("[media] cec: s5p-cec: Add s5p-cec driver")
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/cec/platform/s5p/s5p_cec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Jonathan Cameron May 5, 2021, 12:24 p.m. UTC | #1
On Wed, 5 May 2021 11:41:54 +0200
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> There's a bug at s5p_cec_adap_enable(): if called to
> disable the device, it should call pm_runtime_put()
> instead of pm_runtime_disable(), as the goal here is to
> decrement the usage_count and not to disable PM runtime.
> 
> Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
> Fixes: 1bcbf6f4b6b0 ("[media] cec: s5p-cec: Add s5p-cec driver")
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/media/cec/platform/s5p/s5p_cec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c
> index 2a3e7ffefe0a..3c7c4c3c798c 100644
> --- a/drivers/media/cec/platform/s5p/s5p_cec.c
> +++ b/drivers/media/cec/platform/s5p/s5p_cec.c
> @@ -51,7 +51,7 @@ static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
>  	} else {
>  		s5p_cec_mask_tx_interrupts(cec);
>  		s5p_cec_mask_rx_interrupts(cec);
> -		pm_runtime_disable(cec->dev);
> +		pm_runtime_put(cec->dev);
>  	}
>  
>  	return 0;

Patch
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diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c
index 2a3e7ffefe0a..3c7c4c3c798c 100644
--- a/drivers/media/cec/platform/s5p/s5p_cec.c
+++ b/drivers/media/cec/platform/s5p/s5p_cec.c
@@ -51,7 +51,7 @@  static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
 	} else {
 		s5p_cec_mask_tx_interrupts(cec);
 		s5p_cec_mask_rx_interrupts(cec);
-		pm_runtime_disable(cec->dev);
+		pm_runtime_put(cec->dev);
 	}
 
 	return 0;