diff mbox series

[v2,1/4] rcar-vin: Do not try to stop stream if not running

Message ID 20210115002148.4079591-2-niklas.soderlund+renesas@ragnatech.se (mailing list archive)
State New
Delegated to: Kieran Bingham
Headers show
Series rcar-csi2: Update handling of transfer error | expand

Commit Message

Niklas Söderlund Jan. 15, 2021, 12:21 a.m. UTC
Do not attempt to stop the streaming if the stream is not running.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
---
 drivers/media/platform/rcar-vin/rcar-dma.c | 5 +++++
 1 file changed, 5 insertions(+)

Comments

Jacopo Mondi Jan. 15, 2021, 11:14 a.m. UTC | #1
Hi Niklas,

On Fri, Jan 15, 2021 at 01:21:45AM +0100, Niklas Söderlund wrote:
> Do not attempt to stop the streaming if the stream is not running.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>

With the comment on v1 clarified for the double stoppage case:
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>

Thanks
  j

> ---
>  drivers/media/platform/rcar-vin/rcar-dma.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
> index 48280ddb15b9b0ee..f30dafbdf61ca15f 100644
> --- a/drivers/media/platform/rcar-vin/rcar-dma.c
> +++ b/drivers/media/platform/rcar-vin/rcar-dma.c
> @@ -1301,6 +1301,11 @@ void rvin_stop_streaming(struct rvin_dev *vin)
>
>  	spin_lock_irqsave(&vin->qlock, flags);
>
> +	if (vin->state == STOPPED) {
> +		spin_unlock_irqrestore(&vin->qlock, flags);
> +		return;
> +	}
> +
>  	vin->state = STOPPING;
>
>  	/* Wait until only scratch buffer is used, max 3 interrupts. */
> --
> 2.30.0
>
diff mbox series

Patch

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 48280ddb15b9b0ee..f30dafbdf61ca15f 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -1301,6 +1301,11 @@  void rvin_stop_streaming(struct rvin_dev *vin)
 
 	spin_lock_irqsave(&vin->qlock, flags);
 
+	if (vin->state == STOPPED) {
+		spin_unlock_irqrestore(&vin->qlock, flags);
+		return;
+	}
+
 	vin->state = STOPPING;
 
 	/* Wait until only scratch buffer is used, max 3 interrupts. */