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* [PATCH v2] dmaengine: ti: edma: add missed operations
@ 2019-11-24  5:28 Chuhong Yuan
  2019-11-25  9:41 ` Peter Ujfalusi
  0 siblings, 1 reply; 2+ messages in thread
From: Chuhong Yuan @ 2019-11-24  5:28 UTC (permalink / raw)
  To: unlisted-recipients:; (no To-header on input)
  Cc: Vinod Koul, Dan Williams, Peter Ujfalusi, dmaengine,
	linux-kernel, Chuhong Yuan

The driver forgets to call pm_runtime_disable and pm_runtime_put_sync in
probe failure and remove.
Add the calls and modify probe failure handling to fix it.

To simplify the fix, the patch adjusts the calling order and merges checks
for devm_kcalloc.

Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
---
Changes in v2:
  - Add the missed pm_runtime_put_sync.
  - Simplify the patch.
  - Rebase to dma-next.

 drivers/dma/ti/edma.c | 37 ++++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)

diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
index 756a3c951dc7..0628ee4bf1b4 100644
--- a/drivers/dma/ti/edma.c
+++ b/drivers/dma/ti/edma.c
@@ -2289,13 +2289,6 @@ static int edma_probe(struct platform_device *pdev)
 	if (!info)
 		return -ENODEV;
 
-	pm_runtime_enable(dev);
-	ret = pm_runtime_get_sync(dev);
-	if (ret < 0) {
-		dev_err(dev, "pm_runtime_get_sync() failed\n");
-		return ret;
-	}
-
 	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
 	if (ret)
 		return ret;
@@ -2326,27 +2319,31 @@ static int edma_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, ecc);
 
+	pm_runtime_enable(dev);
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0) {
+		dev_err(dev, "pm_runtime_get_sync() failed\n");
+		pm_runtime_disable(dev);
+		return ret;
+	}
+
 	/* Get eDMA3 configuration from IP */
 	ret = edma_setup_from_hw(dev, info, ecc);
 	if (ret)
-		return ret;
+		goto err_disable_pm;
 
 	/* Allocate memory based on the information we got from the IP */
 	ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
 					sizeof(*ecc->slave_chans), GFP_KERNEL);
-	if (!ecc->slave_chans)
-		return -ENOMEM;
 
 	ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
 				       sizeof(unsigned long), GFP_KERNEL);
-	if (!ecc->slot_inuse)
-		return -ENOMEM;
 
 	ecc->channels_mask = devm_kcalloc(dev,
 					   BITS_TO_LONGS(ecc->num_channels),
 					   sizeof(unsigned long), GFP_KERNEL);
-	if (!ecc->channels_mask)
-		return -ENOMEM;
+	if (!ecc->slave_chans || !ecc->slot_inuse || !ecc->channels_mask)
+		goto err_disable_pm;
 
 	/* Mark all channels available initially */
 	bitmap_fill(ecc->channels_mask, ecc->num_channels);
@@ -2388,7 +2385,7 @@ static int edma_probe(struct platform_device *pdev)
 				       ecc);
 		if (ret) {
 			dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
-			return ret;
+			goto err_disable_pm;
 		}
 		ecc->ccint = irq;
 	}
@@ -2404,7 +2401,7 @@ static int edma_probe(struct platform_device *pdev)
 				       ecc);
 		if (ret) {
 			dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
-			return ret;
+			goto err_disable_pm;
 		}
 		ecc->ccerrint = irq;
 	}
@@ -2412,7 +2409,8 @@ static int edma_probe(struct platform_device *pdev)
 	ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
 	if (ecc->dummy_slot < 0) {
 		dev_err(dev, "Can't allocate PaRAM dummy slot\n");
-		return ecc->dummy_slot;
+		ret = ecc->dummy_slot;
+		goto err_disable_pm;
 	}
 
 	queue_priority_mapping = info->queue_priority_mapping;
@@ -2512,6 +2510,9 @@ static int edma_probe(struct platform_device *pdev)
 
 err_reg1:
 	edma_free_slot(ecc, ecc->dummy_slot);
+err_disable_pm:
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
 	return ret;
 }
 
@@ -2542,6 +2543,8 @@ static int edma_remove(struct platform_device *pdev)
 	if (ecc->dma_memcpy)
 		dma_async_device_unregister(ecc->dma_memcpy);
 	edma_free_slot(ecc, ecc->dummy_slot);
+	pm_runtime_put_sync(dev);
+	pm_runtime_disable(dev);
 
 	return 0;
 }
-- 
2.24.0


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: [PATCH v2] dmaengine: ti: edma: add missed operations
  2019-11-24  5:28 [PATCH v2] dmaengine: ti: edma: add missed operations Chuhong Yuan
@ 2019-11-25  9:41 ` Peter Ujfalusi
  0 siblings, 0 replies; 2+ messages in thread
From: Peter Ujfalusi @ 2019-11-25  9:41 UTC (permalink / raw)
  To: Chuhong Yuan; +Cc: Vinod Koul, Dan Williams, dmaengine, linux-kernel



On 24/11/2019 7.28, Chuhong Yuan wrote:
> The driver forgets to call pm_runtime_disable and pm_runtime_put_sync in
> probe failure and remove.
> Add the calls and modify probe failure handling to fix it.
> 
> To simplify the fix, the patch adjusts the calling order and merges checks
> for devm_kcalloc.
> 
> Fixes: 2b6b3b742019 ("ARM/dmaengine: edma: Merge the two drivers under drivers/dma/")
> Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
> ---
> Changes in v2:
>   - Add the missed pm_runtime_put_sync.
>   - Simplify the patch.
>   - Rebase to dma-next.

Thank you,

Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

> 
>  drivers/dma/ti/edma.c | 37 ++++++++++++++++++++-----------------
>  1 file changed, 20 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> index 756a3c951dc7..0628ee4bf1b4 100644
> --- a/drivers/dma/ti/edma.c
> +++ b/drivers/dma/ti/edma.c
> @@ -2289,13 +2289,6 @@ static int edma_probe(struct platform_device *pdev)
>  	if (!info)
>  		return -ENODEV;
>  
> -	pm_runtime_enable(dev);
> -	ret = pm_runtime_get_sync(dev);
> -	if (ret < 0) {
> -		dev_err(dev, "pm_runtime_get_sync() failed\n");
> -		return ret;
> -	}
> -
>  	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
>  	if (ret)
>  		return ret;
> @@ -2326,27 +2319,31 @@ static int edma_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, ecc);
>  
> +	pm_runtime_enable(dev);
> +	ret = pm_runtime_get_sync(dev);
> +	if (ret < 0) {
> +		dev_err(dev, "pm_runtime_get_sync() failed\n");
> +		pm_runtime_disable(dev);
> +		return ret;
> +	}
> +
>  	/* Get eDMA3 configuration from IP */
>  	ret = edma_setup_from_hw(dev, info, ecc);
>  	if (ret)
> -		return ret;
> +		goto err_disable_pm;
>  
>  	/* Allocate memory based on the information we got from the IP */
>  	ecc->slave_chans = devm_kcalloc(dev, ecc->num_channels,
>  					sizeof(*ecc->slave_chans), GFP_KERNEL);
> -	if (!ecc->slave_chans)
> -		return -ENOMEM;
>  
>  	ecc->slot_inuse = devm_kcalloc(dev, BITS_TO_LONGS(ecc->num_slots),
>  				       sizeof(unsigned long), GFP_KERNEL);
> -	if (!ecc->slot_inuse)
> -		return -ENOMEM;
>  
>  	ecc->channels_mask = devm_kcalloc(dev,
>  					   BITS_TO_LONGS(ecc->num_channels),
>  					   sizeof(unsigned long), GFP_KERNEL);
> -	if (!ecc->channels_mask)
> -		return -ENOMEM;
> +	if (!ecc->slave_chans || !ecc->slot_inuse || !ecc->channels_mask)
> +		goto err_disable_pm;
>  
>  	/* Mark all channels available initially */
>  	bitmap_fill(ecc->channels_mask, ecc->num_channels);
> @@ -2388,7 +2385,7 @@ static int edma_probe(struct platform_device *pdev)
>  				       ecc);
>  		if (ret) {
>  			dev_err(dev, "CCINT (%d) failed --> %d\n", irq, ret);
> -			return ret;
> +			goto err_disable_pm;
>  		}
>  		ecc->ccint = irq;
>  	}
> @@ -2404,7 +2401,7 @@ static int edma_probe(struct platform_device *pdev)
>  				       ecc);
>  		if (ret) {
>  			dev_err(dev, "CCERRINT (%d) failed --> %d\n", irq, ret);
> -			return ret;
> +			goto err_disable_pm;
>  		}
>  		ecc->ccerrint = irq;
>  	}
> @@ -2412,7 +2409,8 @@ static int edma_probe(struct platform_device *pdev)
>  	ecc->dummy_slot = edma_alloc_slot(ecc, EDMA_SLOT_ANY);
>  	if (ecc->dummy_slot < 0) {
>  		dev_err(dev, "Can't allocate PaRAM dummy slot\n");
> -		return ecc->dummy_slot;
> +		ret = ecc->dummy_slot;
> +		goto err_disable_pm;
>  	}
>  
>  	queue_priority_mapping = info->queue_priority_mapping;
> @@ -2512,6 +2510,9 @@ static int edma_probe(struct platform_device *pdev)
>  
>  err_reg1:
>  	edma_free_slot(ecc, ecc->dummy_slot);
> +err_disable_pm:
> +	pm_runtime_put_sync(dev);
> +	pm_runtime_disable(dev);
>  	return ret;
>  }
>  
> @@ -2542,6 +2543,8 @@ static int edma_remove(struct platform_device *pdev)
>  	if (ecc->dma_memcpy)
>  		dma_async_device_unregister(ecc->dma_memcpy);
>  	edma_free_slot(ecc, ecc->dummy_slot);
> +	pm_runtime_put_sync(dev);
> +	pm_runtime_disable(dev);
>  
>  	return 0;
>  }
> 

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki

^ permalink raw reply	[flat|nested] 2+ messages in thread

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2019-11-24  5:28 [PATCH v2] dmaengine: ti: edma: add missed operations Chuhong Yuan
2019-11-25  9:41 ` Peter Ujfalusi

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