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@xxxxxxxxx>
> ---
> 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@xxxxxx>
>
> 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
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