On Tuesday 23 September 2014 09:10 PM, Vinod Koul wrote:
> On Tue, Sep 23, 2014 at 06:20:46PM +0530, Kiran Padwal wrote:
>> This change uses managed resource APIs to allocate resources such as,
>> mem, irq in order to simplify the driver unload or failure cases.
>>
>> Signed-off-by: Kiran Padwal <kiran.padwal@xxxxxxxxxxxxxxx>
>> ---
>> drivers/dma/cppi41.c | 15 ++++-----------
>> 1 file changed, 4 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
>> index 5921ce3..d3700fb 100644
>> --- a/drivers/dma/cppi41.c
>> +++ b/drivers/dma/cppi41.c
>> @@ -938,7 +938,7 @@ static int cppi41_dma_probe(struct platform_device *pdev)
>> if (!glue_info)
>> return -EINVAL;
>>
>> - cdd = kzalloc(sizeof(*cdd), GFP_KERNEL);
>> + cdd = devm_kzalloc(&pdev->dev, sizeof(*cdd), GFP_KERNEL);
>> if (!cdd)
>> return -ENOMEM;
>>
>> @@ -959,10 +959,8 @@ static int cppi41_dma_probe(struct platform_device *pdev)
>> cdd->qmgr_mem = of_iomap(dev->of_node, 3);
>>
>> if (!cdd->usbss_mem || !cdd->ctrl_mem || !cdd->sched_mem ||
>> - !cdd->qmgr_mem) {
>> - ret = -ENXIO;
>> - goto err_remap;
>> - }
>> + !cdd->qmgr_mem)
>> + return -ENXIO;
>>
>> pm_runtime_enable(dev);
>> ret = pm_runtime_get_sync(dev);
>> @@ -989,7 +987,7 @@ static int cppi41_dma_probe(struct platform_device *pdev)
>>
>> cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER);
>>
>> - ret = request_irq(irq, glue_info->isr, IRQF_SHARED,
>> + ret = devm_request_irq(&pdev->dev, irq, glue_info->isr, IRQF_SHARED,
>> dev_name(dev), cdd);
>> if (ret)
>> goto err_irq;
>> @@ -1009,7 +1007,6 @@ static int cppi41_dma_probe(struct platform_device *pdev)
>> err_of:
>> dma_async_device_unregister(&cdd->ddev);
>> err_dma_reg:
>> - free_irq(irq, cdd);
>> err_irq:
>> cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
>> cleanup_chans(cdd);
>> @@ -1023,8 +1020,6 @@ err_get_sync:
>> iounmap(cdd->ctrl_mem);
>> iounmap(cdd->sched_mem);
>> iounmap(cdd->qmgr_mem);
>> -err_remap:
>> - kfree(cdd);
>> return ret;
>> }
>>
>> @@ -1036,7 +1031,6 @@ static int cppi41_dma_remove(struct platform_device *pdev)
>> dma_async_device_unregister(&cdd->ddev);
>>
>> cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
>> - free_irq(cdd->irq, cdd);
> pls use devm_free_irq() explicitly here, other wise your controller is active and able
> to send interrupts and driver object is getting removed. It is the role of
> driver to quiesce device before releasing
>
Thanks, I will take care of that and resend the patch.
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