On 25-09-03, Frank Li wrote:
> On Wed, Sep 03, 2025 at 03:06:14PM +0200, Marco Felsch wrote:
> > Make use of the devm_add_action_or_reset() to register a custom devm_
> > release hook. This is required since we want to turn of the IRQs before
>
> turn off?
>
> > doing the dma_async_device_unregister().
> >
> > This removes the last goto error handling within the probe function and
>
> Remove the last ..
I rephrased the commit message.
> > further trims the remove() function. Instead of freeing the irq, we can
> > disable it and let the devm-irq do the job to free the irq, since the
> > only purpose was to have the irqs disabled before calling
> > dma_async_device_unregister().
> >
> > Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
> > ---
> > drivers/dma/imx-sdma.c | 19 +++++++++++--------
> > 1 file changed, 11 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> > index 5a571d3f33158813e0c56484600a49b19a6a72e2..f6bb2f88a62781c0431336c365fa30c46f1401ad 100644
> > --- a/drivers/dma/imx-sdma.c
> > +++ b/drivers/dma/imx-sdma.c
> > @@ -2232,6 +2232,14 @@ static struct dma_chan *sdma_xlate(struct of_phandle_args *dma_spec,
> > ofdma->of_node);
> > }
> >
> > +static void sdma_dma_device_unregister_action(void *data)
> > +{
> > + struct sdma_engine *sdma = data;
> > +
> > + disable_irq(sdma->irq);
> > + dma_async_device_unregister(&sdma->dma_device);
> > +}
> > +
> > static int sdma_probe(struct platform_device *pdev)
> > {
> > struct device *dev = &pdev->dev;
> > @@ -2358,10 +2366,12 @@ static int sdma_probe(struct platform_device *pdev)
> > return ret;
> > }
> >
> > + devm_add_action_or_reset(dev, sdma_dma_device_unregister_action, sdma);
> > +
>
> need check return value.
Sure, thanks.
Regards,
Marco
>
> Frank
>
> > ret = of_dma_controller_register(np, sdma_xlate, sdma);
> > if (ret) {
> > dev_err(dev, "failed to register controller\n");
> > - goto err_register;
> > + return ret;
> > }
> >
> > spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
> > @@ -2388,11 +2398,6 @@ static int sdma_probe(struct platform_device *pdev)
> > }
> >
> > return 0;
> > -
> > -err_register:
> > - dma_async_device_unregister(&sdma->dma_device);
> > -
> > - return ret;
> > }
> >
> > static void sdma_remove(struct platform_device *pdev)
> > @@ -2400,8 +2405,6 @@ static void sdma_remove(struct platform_device *pdev)
> > struct sdma_engine *sdma = platform_get_drvdata(pdev);
> > int i;
> >
> > - devm_free_irq(&pdev->dev, sdma->irq, sdma);
> > - dma_async_device_unregister(&sdma->dma_device);
> > /* Kill the tasklet */
> > for (i = 0; i < MAX_DMA_CHANNELS; i++) {
> > struct sdma_channel *sdmac = &sdma->channel[i];
> >
> > --
> > 2.47.2
> >
>