linux-kernel - Re: [PATCH 2/2] dma: imx-sdma: Adding tasklet_kill() in sdma

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Message-ID: <20140731120205.GT8181@intel.com>
Date:	Thu, 31 Jul 2014 17:32:05 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Vignesh Raman <Vignesh_Raman@...tor.com>
Cc:	dan.j.williams@...el.com, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jiada_Wang@...tor.com
Subject: Re: [PATCH 2/2] dma: imx-sdma: Adding tasklet_kill() in
 sdma_remove function.

On Wed, Jul 30, 2014 at 06:41:15PM +0530, Vignesh Raman wrote:
> Several dma drivers calls tasklet_kill() in remove function. This is missing in
> imx driver, so adding tasklet_kill() in sdma_remove function.
And why should we do that ?

-- 
~Vinod

> 
> Signed-off-by: Vignesh Raman <Vignesh_Raman@...tor.com>
> ---
>  drivers/dma/imx-sdma.c |    7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 1360b9d..974337f 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -1636,12 +1636,19 @@ static int sdma_remove(struct platform_device *pdev)
>  	struct sdma_engine *sdma = platform_get_drvdata(pdev);
>  	struct resource *iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	int irq = platform_get_irq(pdev, 0);
> +	int i;
>  
>  	dma_async_device_unregister(&sdma->dma_device);
>  	kfree(sdma->script_addrs);
>  	free_irq(irq, sdma);
>  	iounmap(sdma->regs);
>  	release_mem_region(iores->start, resource_size(iores));
> +	/* Kill the tasklet */
> +	for (i = 0; i < MAX_DMA_CHANNELS; i++) {
> +		struct sdma_channel *sdmac = &sdma->channel[i];
> +
> +		tasklet_kill(&sdmac->tasklet);
> +	}
>  	kfree(sdma);
>  
>  	platform_set_drvdata(pdev, NULL);
> -- 
> 1.7.9.5
> 

-- 
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